diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-05-26 12:32:41 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-05-26 12:32:41 -0700 |
commit | 98931dd95fd489fcbfa97da563505a6f071d7c77 (patch) | |
tree | 44683fc4a92efa614acdca2742a7ff19d26da1e3 /tools/testing | |
parent | df202b452fe6c6d6f1351bad485e2367ef1e644e (diff) | |
parent | f403f22f8ccb12860b2b62fec3173c6ccd45938b (diff) |
Merge tag 'mm-stable-2022-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
"Almost all of MM here. A few things are still getting finished off,
reviewed, etc.
- Yang Shi has improved the behaviour of khugepaged collapsing of
readonly file-backed transparent hugepages.
- Johannes Weiner has arranged for zswap memory use to be tracked and
managed on a per-cgroup basis.
- Munchun Song adds a /proc knob ("hugetlb_optimize_vmemmap") for
runtime enablement of the recent huge page vmemmap optimization
feature.
- Baolin Wang contributes a series to fix some issues around hugetlb
pagetable invalidation.
- Zhenwei Pi has fixed some interactions between hwpoisoned pages and
virtualization.
- Tong Tiangen has enabled the use of the presently x86-only
page_table_check debugging feature on arm64 and riscv.
- David Vernet has done some fixup work on the memcg selftests.
- Peter Xu has taught userfaultfd to handle write protection faults
against shmem- and hugetlbfs-backed files.
- More DAMON development from SeongJae Park - adding online tuning of
the feature and support for monitoring of fixed virtual address
ranges. Also easier discovery of which monitoring operations are
available.
- Nadav Amit has done some optimization of TLB flushing during
mprotect().
- Neil Brown continues to labor away at improving our swap-over-NFS
support.
- David Hildenbrand has some fixes to anon page COWing versus
get_user_pages().
- Peng Liu fixed some errors in the core hugetlb code.
- Joao Martins has reduced the amount of memory consumed by
device-dax's compound devmaps.
- Some cleanups of the arch-specific pagemap code from Anshuman
Khandual.
- Muchun Song has found and fixed some errors in the TLB flushing of
transparent hugepages.
- Roman Gushchin has done more work on the memcg selftests.
... and, of course, many smaller fixes and cleanups. Notably, the
customary million cleanup serieses from Miaohe Lin"
* tag 'mm-stable-2022-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (381 commits)
mm: kfence: use PAGE_ALIGNED helper
selftests: vm: add the "settings" file with timeout variable
selftests: vm: add "test_hmm.sh" to TEST_FILES
selftests: vm: check numa_available() before operating "merge_across_nodes" in ksm_tests
selftests: vm: add migration to the .gitignore
selftests/vm/pkeys: fix typo in comment
ksm: fix typo in comment
selftests: vm: add process_mrelease tests
Revert "mm/vmscan: never demote for memcg reclaim"
mm/kfence: print disabling or re-enabling message
include/trace/events/percpu.h: cleanup for "percpu: improve percpu_alloc_percpu event trace"
include/trace/events/mmflags.h: cleanup for "tracing: incorrect gfp_t conversion"
mm: fix a potential infinite loop in start_isolate_page_range()
MAINTAINERS: add Muchun as co-maintainer for HugeTLB
zram: fix Kconfig dependency warning
mm/shmem: fix shmem folio swapoff hang
cgroup: fix an error handling path in alloc_pagecache_max_30M()
mm: damon: use HPAGE_PMD_SIZE
tracing: incorrect isolate_mote_t cast in mm_vmscan_lru_isolate
nodemask.h: fix compilation error with GCC12
...
Diffstat (limited to 'tools/testing')
21 files changed, 1008 insertions, 616 deletions
diff --git a/tools/testing/selftests/cgroup/cgroup_util.c b/tools/testing/selftests/cgroup/cgroup_util.c index 4297d580e3f8..4c52cc6f2f9c 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.c +++ b/tools/testing/selftests/cgroup/cgroup_util.c @@ -19,6 +19,7 @@ #include "cgroup_util.h" #include "../clone3/clone3_selftests.h" +/* Returns read len on success, or -errno on failure. */ static ssize_t read_text(const char *path, char *buf, size_t max_len) { ssize_t len; @@ -26,35 +27,29 @@ static ssize_t read_text(const char *path, char *buf, size_t max_len) fd = open(path, O_RDONLY); if (fd < 0) - return fd; + return -errno; len = read(fd, buf, max_len - 1); - if (len < 0) - goto out; - buf[len] = 0; -out: + if (len >= 0) + buf[len] = 0; + close(fd); - return len; + return len < 0 ? -errno : len; } +/* Returns written len on success, or -errno on failure. */ static ssize_t write_text(const char *path, char *buf, ssize_t len) { int fd; fd = open(path, O_WRONLY | O_APPEND); if (fd < 0) - return fd; + return -errno; len = write(fd, buf, len); - if (len < 0) { - close(fd); - return len; - } - close(fd); - - return len; + return len < 0 ? -errno : len; } char *cg_name(const char *root, const char *name) @@ -87,16 +82,16 @@ char *cg_control(const char *cgroup, const char *control) return ret; } +/* Returns 0 on success, or -errno on failure. */ int cg_read(const char *cgroup, const char *control, char *buf, size_t len) { char path[PATH_MAX]; + ssize_t ret; snprintf(path, sizeof(path), "%s/%s", cgroup, control); - if (read_text(path, buf, len) >= 0) - return 0; - - return -1; + ret = read_text(path, buf, len); + return ret >= 0 ? 0 : ret; } int cg_read_strcmp(const char *cgroup, const char *control, @@ -177,17 +172,15 @@ long cg_read_lc(const char *cgroup, const char *control) return cnt; } +/* Returns 0 on success, or -errno on failure. */ int cg_write(const char *cgroup, const char *control, char *buf) { char path[PATH_MAX]; - ssize_t len = strlen(buf); + ssize_t len = strlen(buf), ret; snprintf(path, sizeof(path), "%s/%s", cgroup, control); - - if (write_text(path, buf, len) == len) - return 0; - - return -1; + ret = write_text(path, buf, len); + return ret == len ? 0 : ret; } int cg_write_numeric(const char *cgroup, const char *control, long value) @@ -547,6 +540,18 @@ int set_oom_adj_score(int pid, int score) return 0; } +int proc_mount_contains(const char *option) +{ + char buf[4 * PAGE_SIZE]; + ssize_t read; + + read = read_text("/proc/mounts", buf, sizeof(buf)); + if (read < 0) + return read; + + return strstr(buf, option) != NULL; +} + ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size) { char path[PATH_MAX]; @@ -557,7 +562,8 @@ ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t else snprintf(path, sizeof(path), "/proc/%d/%s", pid, item); - return read_text(path, buf, size); + size = read_text(path, buf, size); + return size < 0 ? -1 : size; } int proc_read_strstr(int pid, bool thread, const char *item, const char *needle) diff --git a/tools/testing/selftests/cgroup/cgroup_util.h b/tools/testing/selftests/cgroup/cgroup_util.h index 2ee2119281d7..c92df4e5d395 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.h +++ b/tools/testing/selftests/cgroup/cgroup_util.h @@ -52,6 +52,7 @@ extern int is_swap_enabled(void); extern int set_oom_adj_score(int pid, int score); extern int cg_wait_for_proc_count(const char *cgroup, int count); extern int cg_killall(const char *cgroup); +int proc_mount_contains(const char *option); extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size); extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle); extern pid_t clone_into_cgroup(int cgroup_fd); diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c index 36ccf2322e21..44a974ec472c 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -21,6 +21,9 @@ #include "../kselftest.h" #include "cgroup_util.h" +static bool has_localevents; +static bool has_recursiveprot; + /* * This test creates two nested cgroups with and without enabling * the memory controller. @@ -211,13 +214,17 @@ static int alloc_pagecache_50M_noexit(const char *cgroup, void *arg) static int alloc_anon_noexit(const char *cgroup, void *arg) { int ppid = getppid(); + size_t size = (unsigned long)arg; + char *buf, *ptr; - if (alloc_anon(cgroup, arg)) - return -1; + buf = malloc(size); + for (ptr = buf; ptr < buf + size; ptr += PAGE_SIZE) + *ptr = 0; while (getppid() == ppid) sleep(1); + free(buf); return 0; } @@ -244,8 +251,8 @@ static int cg_test_proc_killed(const char *cgroup) * A/B memory.min = 50M, memory.current = 50M * A/B/C memory.min = 75M, memory.current = 50M * A/B/D memory.min = 25M, memory.current = 50M - * A/B/E memory.min = 500M, memory.current = 0 - * A/B/F memory.min = 0, memory.current = 50M + * A/B/E memory.min = 0, memory.current = 50M + * A/B/F memory.min = 500M, memory.current = 0 * * Usages are pagecache, but the test keeps a running * process in every leaf cgroup. @@ -255,7 +262,7 @@ static int cg_test_proc_killed(const char *cgroup) * A/B memory.current ~= 50M * A/B/C memory.current ~= 33M * A/B/D memory.current ~= 17M - * A/B/E memory.current ~= 0 + * A/B/F memory.current ~= 0 * * After that it tries to allocate more than there is * unprotected memory in A available, and checks @@ -321,7 +328,7 @@ static int test_memcg_min(const char *root) if (cg_create(children[i])) goto cleanup; - if (i == 2) + if (i > 2) continue; cg_run_nowait(children[i], alloc_pagecache_50M_noexit, @@ -336,9 +343,9 @@ static int test_memcg_min(const char *root) goto cleanup; if (cg_write(children[1], "memory.min", "25M")) goto cleanup; - if (cg_write(children[2], "memory.min", "500M")) + if (cg_write(children[2], "memory.min", "0")) goto cleanup; - if (cg_write(children[3], "memory.min", "0")) + if (cg_write(children[3], "memory.min", "500M")) goto cleanup; attempts = 0; @@ -364,7 +371,7 @@ static int test_memcg_min(const char *root) if (!values_close(c[1], MB(17), 10)) goto cleanup; - if (!values_close(c[2], 0, 1)) + if (c[3] != 0) goto cleanup; if (!cg_run(parent[2], alloc_anon, (void *)MB(170))) @@ -401,8 +408,8 @@ cleanup: * A/B memory.low = 50M, memory.current = 50M * A/B/C memory.low = 75M, memory.current = 50M * A/B/D memory.low = 25M, memory.current = 50M - * A/B/E memory.low = 500M, memory.current = 0 - * A/B/F memory.low = 0, memory.current = 50M + * A/B/E memory.low = 0, memory.current = 50M + * A/B/F memory.low = 500M, memory.current = 0 * * Usages are pagecache. * Then it creates A/G an creates a significant @@ -412,7 +419,7 @@ cleanup: * A/B memory.current ~= 50M * A/B/ memory.current ~= 33M * A/B/D memory.current ~= 17M - * A/B/E memory.current ~= 0 + * A/B/F memory.current ~= 0 * * After that it tries to allocate more than there is * unprotected memory in A available, @@ -476,7 +483,7 @@ static int test_memcg_low(const char *root) if (cg_create(children[i])) goto cleanup; - if (i == 2) + if (i > 2) continue; if (cg_run(children[i], alloc_pagecache_50M, (void *)(long)fd)) @@ -491,9 +498,9 @@ static int test_memcg_low(const char *root) goto cleanup; if (cg_write(children[1], "memory.low", "25M")) goto cleanup; - if (cg_write(children[2], "memory.low", "500M")) + if (cg_write(children[2], "memory.low", "0")) goto cleanup; - if (cg_write(children[3], "memory.low", "0")) + if (cg_write(children[3], "memory.low", "500M")) goto cleanup; if (cg_run(parent[2], alloc_anon, (void *)MB(148))) @@ -511,7 +518,7 @@ static int test_memcg_low(const char *root) if (!values_close(c[1], MB(17), 10)) goto cleanup; - if (!values_close(c[2], 0, 1)) + if (c[3] != 0) goto cleanup; if (cg_run(parent[2], alloc_anon, (void *)MB(166))) { @@ -521,15 +528,18 @@ static int test_memcg_low(const char *root) } for (i = 0; i < ARRAY_SIZE(children); i++) { + int no_low_events_index = has_recursiveprot ? 2 : 1; + oom = cg_read_key_long(children[i], "memory.events", "oom "); low = cg_read_key_long(children[i], "memory.events", "low "); if (oom) goto cleanup; - if (i < 2 && low <= 0) + if (i <= no_low_events_index && low <= 0) goto cleanup; - if (i >= 2 && low) + if (i > no_low_events_index && low) goto cleanup; + } ret = KSFT_PASS; @@ -558,9 +568,14 @@ static int alloc_pagecache_max_30M(const char *cgroup, void *arg) { size_t size = MB(50); int ret = -1; - long current; + long current, high, max; int fd; + high = cg_read_long(cgroup, "memory.high"); + max = cg_read_long(cgroup, "memory.max"); + if (high != MB(30) && max != MB(30)) + return -1; + fd = get_temp_fd(); if (fd < 0) return -1; @@ -569,7 +584,7 @@ static int alloc_pagecache_max_30M(const char *cgroup, void *arg) goto cleanup; current = cg_read_long(cgroup, "memory.current"); - if (current <= MB(29) || current > MB(30)) + if (!values_close(current, MB(30), 5)) goto cleanup; ret = 0; @@ -607,7 +622,7 @@ static int test_memcg_high(const char *root) if (cg_write(memcg, "memory.high", "30M")) goto cleanup; - if (cg_run(memcg, alloc_anon, (void *)MB(100))) + if (cg_run(memcg, alloc_anon, (void *)MB(31))) goto cleanup; if (!cg_run(memcg, alloc_pagecache_50M_check, NULL)) @@ -756,6 +771,111 @@ cleanup: return ret; } +/* + * This test checks that memory.reclaim reclaims the given + * amount of memory (from both anon and file, if possible). + */ +static int test_memcg_reclaim(const char *root) +{ + int ret = KSFT_FAIL, fd, retries; + char *memcg; + long current, expected_usage, to_reclaim; + char buf[64]; + + memcg = cg_name(root, "memcg_test"); + if (!memcg) + goto cleanup; + + if (cg_create(memcg)) + goto cleanup; + + current = cg_read_long(memcg, "memory.current"); + if (current != 0) + goto cleanup; + + fd = get_temp_fd(); + if (fd < 0) + goto cleanup; + + cg_run_nowait(memcg, alloc_pagecache_50M_noexit, (void *)(long)fd); + + /* + * If swap is enabled, try to reclaim from both anon and file, else try + * to reclaim from file only. + */ + if (is_swap_enabled()) { + cg_run_nowait(memcg, alloc_anon_noexit, (void *) MB(50)); + expected_usage = MB(100); + } else + expected_usage = MB(50); + + /* + * Wait until current usage reaches the expected usage (or we run out of + * retries). + */ + retries = 5; + while (!values_close(cg_read_long(memcg, "memory.current"), + expected_usage, 10)) { + if (retries--) { + sleep(1); + continue; + } else { + fprintf(stderr, + "failed to allocate %ld for memcg reclaim test\n", + expected_usage); + goto cleanup; + } + } + + /* + * Reclaim until current reaches 30M, this makes sure we hit both anon + * and file if swap is enabled. + */ + retries = 5; + while (true) { + int err; + + current = cg_read_long(memcg, "memory.current"); + to_reclaim = current - MB(30); + + /* + * We only keep looping if we get EAGAIN, which means we could + * not reclaim the full amount. + */ + if (to_reclaim <= 0) + goto cleanup; + + + snprintf(buf, sizeof(buf), "%ld", to_reclaim); + err = cg_write(memcg, "memory.reclaim", buf); + if (!err) { + /* + * If writing succeeds, then the written amount should have been + * fully reclaimed (and maybe more). + */ + current = cg_read_long(memcg, "memory.current"); + if (!values_close(current, MB(30), 3) && current > MB(30)) + goto cleanup; + break; + } + + /* The kernel could not reclaim the full amount, try again. */ + if (err == -EAGAIN && retries--) + continue; + + /* We got an unexpected error or ran out of retries. */ + goto cleanup; + } + + ret = KSFT_PASS; +cleanup: + cg_destroy(memcg); + free(memcg); + close(fd); + + return ret; +} + static int alloc_anon_50M_check_swap(const char *cgroup, void *arg) { long mem_max = (long)arg; @@ -987,9 +1107,6 @@ static int tcp_client(const char *cgroup, unsigned short port) if (current < 0 || sock < 0) goto close_sk; - if (current < sock) - goto close_sk; - if (values_close(current, sock, 10)) { ret = KSFT_PASS; break; @@ -1079,12 +1196,14 @@ cleanup: /* * This test disables swapping and tries to allocate anonymous memory * up to OOM with memory.group.oom set. Then it checks that all - * processes in the leaf (but not the parent) were killed. + * processes in the leaf were killed. It also checks that oom_events + * were propagated to the parent level. */ static int test_memcg_oom_group_leaf_events(const char *root) { int ret = KSFT_FAIL; char *parent, *child; + long parent_oom_events; parent = cg_name(root, "memcg_test_0"); child = cg_name(root, "memcg_test_0/memcg_test_1"); @@ -1122,7 +1241,7 @@ static int test_memcg_oom_group_leaf_events(const char *root) if (cg_read_key_long(child, "memory.events", "oom_kill ") <= 0) goto cleanup; - if (cg_read_key_long(parent, "memory.events", "oom_kill ") != 0) + if (cg_read_key_long(parent, "memory.events", "oom_kill ") <= 0) goto cleanup; ret = KSFT_PASS; @@ -1230,14 +1349,20 @@ static int test_memcg_oom_group_score_events(const char *root) if (!cg_run(memcg, alloc_anon, (void *)MB(100))) goto cleanup; - if (cg_read_key_long(memcg, "memory.events", "oom_kill ") != 3) - goto cleanup; + parent_oom_events = cg_read_key_long( + parent, "memory.events", "oom_kill "); + /* + * If memory_localevents is not enabled (the default), the parent should + * count OOM events in its children groups. Otherwise, it should not + * have observed any events. + */ + if ((has_localevents && parent_oom_events == 0) || + parent_oom_events > 0) + ret = KSFT_PASS; if (kill(safe_pid, SIGKILL)) goto cleanup; - ret = KSFT_PASS; - cleanup: if (memcg) cg_destroy(memcg); @@ -1246,7 +1371,6 @@ cleanup: return ret; } - #define T(x) { x, #x } struct memcg_test { int (*fn)(const char *root); @@ -1259,6 +1383,7 @@ struct memcg_test { T(test_memcg_high), T(test_memcg_high_sync), T(test_memcg_max), + T(test_memcg_reclaim), T(test_memcg_oom_events), T(test_memcg_swap_max), T(test_memcg_sock), @@ -1271,7 +1396,7 @@ struct memcg_test { int main(int argc, char **argv) { char root[PATH_MAX]; - int i, ret = EXIT_SUCCESS; + int i, proc_status, ret = EXIT_SUCCESS; if (cg_find_unified_root(root, sizeof(root))) ksft_exit_skip("cgroup v2 isn't mounted\n"); @@ -1287,6 +1412,16 @@ int main(int argc, char **argv) if (cg_write(root, "cgroup.subtree_control", "+memory")) ksft_exit_skip("Failed to set memory controller\n"); + proc_status = proc_mount_contains("memory_recursiveprot"); + if (proc_status < 0) + ksft_exit_skip("Failed to query cgroup mount option\n"); + has_recursiveprot = proc_status; + + proc_status = proc_mount_contains("memory_localevents"); + if (proc_status < 0) + ksft_exit_skip("Failed to query cgroup mount option\n"); + has_localevents = proc_status; + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: diff --git a/tools/testing/selftests/damon/sysfs.sh b/tools/testing/selftests/damon/sysfs.sh index 2e3ae77cb6db..89592c64462f 100644 --- a/tools/testing/selftests/damon/sysfs.sh +++ b/tools/testing/selftests/damon/sysfs.sh @@ -231,6 +231,7 @@ test_context() { context_dir=$1 ensure_dir "$context_dir" "exist" + ensure_file "$context_dir/avail_operations" "exit" 400 ensure_file "$context_dir/operations" "exist" 600 test_monitoring_attrs "$context_dir/monitoring_attrs" test_targets "$context_dir/targets" diff --git a/tools/testing/selftests/vm/.gitignore b/tools/testing/selftests/vm/.gitignore index d7507f3c7c76..31e5eea2a9b9 100644 --- a/tools/testing/selftests/vm/.gitignore +++ b/tools/testing/selftests/vm/.gitignore @@ -9,7 +9,9 @@ map_hugetlb map_populate thuge-gen compaction_test +migration mlock2-tests +mrelease_test mremap_dontunmap mremap_test on-fault-limit @@ -29,5 +31,6 @@ write_to_hugetlbfs hmm-tests memfd_secret local_config.* +soft-dirty split_huge_page_test ksm_tests diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index 5b1ecd00695b..44f25acfbeca 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -36,20 +36,23 @@ TEST_GEN_FILES += hugepage-mremap TEST_GEN_FILES += hugepage-shm TEST_GEN_FILES += hugepage-vmemmap TEST_GEN_FILES += khugepaged -TEST_GEN_FILES += madv_populate +TEST_GEN_PROGS = madv_populate TEST_GEN_FILES += map_fixed_noreplace TEST_GEN_FILES += map_hugetlb TEST_GEN_FILES += map_populate TEST_GEN_FILES += memfd_secret +TEST_GEN_FILES += migration TEST_GEN_FILES += mlock-random-test TEST_GEN_FILES += mlock2-tests +TEST_GEN_FILES += mrelease_test TEST_GEN_FILES += mremap_dontunmap TEST_GEN_FILES += mremap_test TEST_GEN_FILES += on-fault-limit TEST_GEN_FILES += thuge-gen TEST_GEN_FILES += transhuge-stress TEST_GEN_FILES += userfaultfd -TEST_GEN_FILES += split_huge_page_test +TEST_GEN_PROGS += soft-dirty +TEST_GEN_PROGS += split_huge_page_test TEST_GEN_FILES += ksm_tests ifeq ($(MACHINE),x86_64) @@ -89,10 +92,15 @@ endif TEST_PROGS := run_vmtests.sh TEST_FILES := test_vmalloc.sh +TEST_FILES += test_hmm.sh KSFT_KHDR_INSTALL := 1 include ../lib.mk +$(OUTPUT)/madv_populate: vm_util.c +$(OUTPUT)/soft-dirty: vm_util.c +$(OUTPUT)/split_huge_page_test: vm_util.c + ifeq ($(MACHINE),x86_64) BINARIES_32 := $(patsubst %,$(OUTPUT)/%,$(BINARIES_32)) BINARIES_64 := $(patsubst %,$(OUTPUT)/%,$(BINARIES_64)) @@ -149,6 +157,8 @@ $(OUTPUT)/hmm-tests: LDLIBS += $(HMM_EXTRA_LIBS) $(OUTPUT)/ksm_tests: LDLIBS += -lnuma +$(OUTPUT)/migration: LDLIBS += -lnuma + local_config.mk local_config.h: check_config.sh /bin/sh ./check_config.sh $(CC) diff --git a/tools/testing/selftests/vm/config b/tools/testing/selftests/vm/config index 60e82da0de85..be087c4bc396 100644 --- a/tools/testing/selftests/vm/config +++ b/tools/testing/selftests/vm/config @@ -4,3 +4,5 @@ CONFIG_TEST_VMALLOC=m CONFIG_DEVICE_PRIVATE=y CONFIG_TEST_HMM=m CONFIG_GUP_TEST=y +CONFIG_TRANSPARENT_HUGEPAGE=y +CONFIG_MEM_SOFT_DIRTY=y diff --git a/tools/testing/selftests/vm/gup_test.c b/tools/testing/selftests/vm/gup_test.c index cda837a14736..6bb36ca71cb5 100644 --- a/tools/testing/selftests/vm/gup_test.c +++ b/tools/testing/selftests/vm/gup_test.c @@ -1,7 +1,9 @@ #include <fcntl.h> +#include <errno.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> +#include <dirent.h> #include <sys/ioctl.h> #include <sys/mman.h> #include <sys/stat.h> @@ -9,6 +11,7 @@ #include <pthread.h> #include <assert.h> #include "../../../../mm/gup_test.h" +#include "../kselftest.h" #include "util.h" @@ -18,6 +21,8 @@ #define FOLL_WRITE 0x01 /* check pte is writable */ #define FOLL_TOUCH 0x02 /* mark page accessed */ +#define GUP_TEST_FILE "/sys/kernel/debug/gup_test" + static unsigned long cmd = GUP_FAST_BENCHMARK; static int gup_fd, repeats = 1; static unsigned long size = 128 * MB; @@ -206,8 +211,23 @@ int main(int argc, char **argv) gup_fd = open("/sys/kernel/debug/gup_test", O_RDWR); if (gup_fd == -1) { - perror("open"); - exit(1); + switch (errno) { + case EACCES: + if (getuid()) + printf("Please run this test as root\n"); + break; + case ENOENT: + if (opendir("/sys/kernel/debug") == NULL) { + printf("mount debugfs at /sys/kernel/debug\n"); + break; + } + printf("check if CONFIG_GUP_TEST is enabled in kernel config\n"); + break; + default: + perror("failed to open /sys/kernel/debug/gup_test"); + break; + } + exit(KSFT_SKIP); } p = mmap(NULL, size, PROT_READ | PROT_WRITE, flags, filed, 0); diff --git a/tools/testing/selftests/vm/hugepage-mremap.c b/tools/testing/selftests/vm/hugepage-mremap.c index 1d689084a54b..585978f181ed 100644 --- a/tools/testing/selftests/vm/hugepage-mremap.c +++ b/tools/testing/selftests/vm/hugepage-mremap.c @@ -178,6 +178,12 @@ int main(int argc, char *argv[]) munmap(addr, length); + addr = mremap(addr, length, length, 0); + if (addr != MAP_FAILED) { + printf("mremap: Expected failure, but call succeeded\n"); + exit(1); + } + close(fd); unlink(argv[argc-1]); diff --git a/tools/testing/selftests/vm/ksm_tests.c b/tools/testing/selftests/vm/ksm_tests.c index fd85f15869d1..2fcf24312da8 100644 --- a/tools/testing/selftests/vm/ksm_tests.c +++ b/tools/testing/selftests/vm/ksm_tests.c @@ -221,7 +221,8 @@ static bool assert_ksm_pages_count(long dupl_page_count) static int ksm_save_def(struct ksm_sysfs *ksm_sysfs) { if (ksm_read_sysfs(KSM_FP("max_page_sharing"), &ksm_sysfs->max_page_sharing) || - ksm_read_sysfs(KSM_FP("merge_across_nodes"), &ksm_sysfs->merge_across_nodes) || + numa_available() ? 0 : + ksm_read_sysfs(KSM_FP("merge_across_nodes"), &ksm_sysfs->merge_across_nodes) || ksm_read_sysfs(KSM_FP("sleep_millisecs"), &ksm_sysfs->sleep_millisecs) || ksm_read_sysfs(KSM_FP("pages_to_scan"), &ksm_sysfs->pages_to_scan) || ksm_read_sysfs(KSM_FP("run"), &ksm_sysfs->run) || @@ -236,7 +237,8 @@ static int ksm_save_def(struct ksm_sysfs *ksm_sysfs) static int ksm_restore(struct ksm_sysfs *ksm_sysfs) { if (ksm_write_sysfs(KSM_FP("max_page_sharing"), ksm_sysfs->max_page_sharing) || - ksm_write_sysfs(KSM_FP("merge_across_nodes"), ksm_sysfs->merge_across_nodes) || + numa_available() ? 0 : + ksm_write_sysfs(KSM_FP("merge_across_nodes"), ksm_sysfs->merge_across_nodes) || ksm_write_sysfs(KSM_FP("pages_to_scan"), ksm_sysfs->pages_to_scan) || ksm_write_sysfs(KSM_FP("run"), ksm_sysfs->run) || ksm_write_sysfs(KSM_FP("sleep_millisecs"), ksm_sysfs->sleep_millisecs) || @@ -720,7 +722,8 @@ int main(int argc, char *argv[]) if (ksm_write_sysfs(KSM_FP("run"), 2) || ksm_write_sysfs(KSM_FP("sleep_millisecs"), 0) || - ksm_write_sysfs(KSM_FP("merge_across_nodes"), 1) || + numa_available() ? 0 : + ksm_write_sysfs(KSM_FP("merge_across_nodes"), 1) || ksm_write_sysfs(KSM_FP("pages_to_scan"), page_count)) return KSFT_FAIL; diff --git a/tools/testing/selftests/vm/madv_populate.c b/tools/testing/selftests/vm/madv_populate.c index 3ee0e8275600..715a42e8e2cd 100644 --- a/tools/testing/selftests/vm/madv_populate.c +++ b/tools/testing/selftests/vm/madv_populate.c @@ -18,6 +18,7 @@ #include <sys/mman.h> #include "../kselftest.h" +#include "vm_util.h" /* * For now, we're using 2 MiB of private anonymous memory for all tests. @@ -26,18 +27,6 @@ static size_t pagesize; -static uint64_t pagemap_get_entry(int fd, char *start) -{ - const unsigned long pfn = (unsigned long)start / pagesize; - uint64_t entry; - int ret; - - ret = pread(fd, &entry, sizeof(entry), pfn * sizeof(entry)); - if (ret != sizeof(entry)) - ksft_exit_fail_msg("reading pagemap failed\n"); - return entry; -} - static bool pagemap_is_populated(int fd, char *start) { uint64_t entry = pagemap_get_entry(fd, start); @@ -46,13 +35,6 @@ static bool pagemap_is_populated(int fd, char *start) return entry & 0xc000000000000000ull; } -static bool pagemap_is_softdirty(int fd, char *start) -{ - uint64_t entry = pagemap_get_entry(fd, start); - - return entry & 0x0080000000000000ull; -} - static void sense_support(void) { char *addr; @@ -258,20 +240,6 @@ static bool range_is_not_softdirty(char *start, ssize_t size) return ret; } -static void clear_softdirty(void) -{ - int fd = open("/proc/self/clear_refs", O_WRONLY); - const char *ctrl = "4"; - int ret; - - if (fd < 0) - ksft_exit_fail_msg("opening clear_refs failed\n"); - ret = write(fd, ctrl, strlen(ctrl)); - if (ret != strlen(ctrl)) - ksft_exit_fail_msg("writing clear_refs failed\n"); - close(fd); -} - static void test_softdirty(void) { char *addr; diff --git a/tools/testing/selftests/vm/migration.c b/tools/testing/selftests/vm/migration.c new file mode 100644 index 000000000000..1cec8425e3ca --- /dev/null +++ b/tools/testing/selftests/vm/migration.c @@ -0,0 +1,193 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * The main purpose of the tests here is to exercise the migration entry code + * paths in the kernel. + */ + +#include "../kselftest_harness.h" +#include <strings.h> +#include <pthread.h> +#include <numa.h> +#include <numaif.h> +#include <sys/mman.h> +#include <sys/types.h> +#include <signal.h> +#include <time.h> + +#define TWOMEG (2<<20) +#define RUNTIME (60) + +#define ALIGN(x, a) (((x) + (a - 1)) & (~((a) - 1))) + +FIXTURE(migration) +{ + pthread_t *threads; + pid_t *pids; + int nthreads; + int n1; + int n2; +}; + +FIXTURE_SETUP(migration) +{ + int n; + + ASSERT_EQ(numa_available(), 0); + self->nthreads = numa_num_task_cpus() - 1; + self->n1 = -1; + self->n2 = -1; + + for (n = 0; n < numa_max_possible_node(); n++) + if (numa_bitmask_isbitset(numa_all_nodes_ptr, n)) { + if (self->n1 == -1) { + self->n1 = n; + } else { + self->n2 = n; + break; + } + } + + self->threads = malloc(self->nthreads * sizeof(*self->threads)); + ASSERT_NE(self->threads, NULL); + self->pids = malloc(self->nthreads * sizeof(*self->pids)); + ASSERT_NE(self->pids, NULL); +}; + +FIXTURE_TEARDOWN(migration) +{ + free(self->threads); + free(self->pids); +} + +int migrate(uint64_t *ptr, int n1, int n2) +{ + int ret, tmp; + int status = 0; + struct timespec ts1, ts2; + + if (clock_gettime(CLOCK_MONOTONIC, &ts1)) + return -1; + + while (1) { + if (clock_gettime(CLOCK_MONOTONIC, &ts2)) + return -1; + + if (ts2.tv_sec - ts1.tv_sec >= RUNTIME) + return 0; + + ret = move_pages(0, 1, (void **) &ptr, &n2, &status, + MPOL_MF_MOVE_ALL); + if (ret) { + if (ret > 0) + printf("Didn't migrate %d pages\n", ret); + else + perror("Couldn't migrate pages"); + return -2; + } + + tmp = n2; + n2 = n1; + n1 = tmp; + } + + return 0; +} + +void *access_mem(void *ptr) +{ + uint64_t y = 0; + volatile uint64_t *x = ptr; + + while (1) { + pthread_testcancel(); + y += *x; + } + + return NULL; +} + +/* + * Basic migration entry testing. One thread will move pages back and forth + * between nodes whilst other threads try and access them triggering the + * migration entry wait paths in the kernel. + */ +TEST_F_TIMEOUT(migration, private_anon, 2*RUNTIME) +{ + uint64_t *ptr; + int i; + + if (self->nthreads < 2 || self->n1 < 0 || self->n2 < 0) + SKIP(return, "Not enough threads or NUMA nodes available"); + + ptr = mmap(NULL, TWOMEG, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + ASSERT_NE(ptr, MAP_FAILED); + + memset(ptr, 0xde, TWOMEG); + for (i = 0; i < self->nthreads - 1; i++) + if (pthread_create(&self->threads[i], NULL, access_mem, ptr)) + perror("Couldn't create thread"); + + ASSERT_EQ(migrate(ptr, self->n1, self->n2), 0); + for (i = 0; i < self->nthreads - 1; i++) + ASSERT_EQ(pthread_cancel(self->threads[i]), 0); +} + +/* + * Same as the previous test but with shared memory. + */ +TEST_F_TIMEOUT(migration, shared_anon, 2*RUNTIME) +{ + pid_t pid; + uint64_t *ptr; + int i; + + if (self->nthreads < 2 || self->n1 < 0 || self->n2 < 0) + SKIP(return, "Not enough threads or NUMA nodes available"); + + ptr = mmap(NULL, TWOMEG, PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_ANONYMOUS, -1, 0); + ASSERT_NE(ptr, MAP_FAILED); + + memset(ptr, 0xde, TWOMEG); + for (i = 0; i < self->nthreads - 1; i++) { + pid = fork(); + if (!pid) + access_mem(ptr); + else + self->pids[i] = pid; + } + + ASSERT_EQ(migrate(ptr, self->n1, self->n2), 0); + for (i = 0; i < self->nthreads - 1; i++) + ASSERT_EQ(kill(self->pids[i], SIGTERM), 0); +} + +/* + * Tests the pmd migration entry paths. + */ +TEST_F_TIMEOUT(migration, private_anon_thp, 2*RUNTIME) +{ + uint64_t *ptr; + int i; + + if (self->nthreads < 2 || self->n1 < 0 || self->n2 < 0) + SKIP(return, "Not enough threads or NUMA nodes available"); + + ptr = mmap(NULL, 2*TWOMEG, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + ASSERT_NE(ptr, MAP_FAILED); + + ptr = (uint64_t *) ALIGN((uintptr_t) ptr, TWOMEG); + ASSERT_EQ(madvise(ptr, TWOMEG, MADV_HUGEPAGE), 0); + memset(ptr, 0xde, TWOMEG); + for (i = 0; i < self->nthreads - 1; i++) + if (pthread_create(&self->threads[i], NULL, access_mem, ptr)) + perror("Couldn't create thread"); + + ASSERT_EQ(migrate(ptr, self->n1, self->n2), 0); + for (i = 0; i < self->nthreads - 1; i++) + ASSERT_EQ(pthread_cancel(self->threads[i]), 0); +} + +TEST_HARNESS_MAIN diff --git a/tools/testing/selftests/vm/mrelease_test.c b/tools/testing/selftests/vm/mrelease_test.c new file mode 100644 index 000000000000..96671c2f7d48 --- /dev/null +++ b/tools/testing/selftests/vm/mrelease_test.c @@ -0,0 +1,200 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2022 Google LLC + */ +#define _GNU_SOURCE +#include <errno.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/wait.h> +#include <unistd.h> + +#include "util.h" + +#include "../kselftest.h" + +#ifndef __NR_pidfd_open +#define __NR_pidfd_open -1 +#endif + +#ifndef __NR_process_mrelease +#define __NR_process_mrelease -1 +#endif + +#define MB(x) (x << 20) +#define MAX_SIZE_MB 1024 + +static int alloc_noexit(unsigned long nr_pages, int pipefd) +{ + int ppid = getppid(); + int timeout = 10; /* 10sec timeout to get killed */ + unsigned long i; + char *buf; + + buf = (char *)mmap(NULL, nr_pages * PAGE_SIZE, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANON, 0, 0); + if (buf == MAP_FAILED) { + perror("mmap failed, halting the test"); + return KSFT_FAIL; + } + + for (i = 0; i < nr_pages; i++) + *((unsigned long *)(buf + (i * PAGE_SIZE))) = i; + + /* Signal the parent that the child is ready */ + if (write(pipefd, "", 1) < 0) { + perror("write"); + return KSFT_FAIL; + } + + /* Wait to be killed (when reparenting happens) */ + while (getppid() == ppid && timeout > 0) { + sleep(1); + timeout--; + } + + munmap(buf, nr_pages * PAGE_SIZE); + + return (timeout > 0) ? KSFT_PASS : KSFT_FAIL; +} + +/* The process_mrelease calls in this test are expected to fail */ +static void run_negative_tests(int pidfd) +{ + /* Test invalid flags. Expect to fail with EINVAL error code. */ + if (!syscall(__NR_process_mrelease, pidfd, (unsigned int)-1) || + errno != EINVAL) { + perror("process_mrelease with wrong flags"); + exit(errno == ENOSYS ? KSFT_SKIP : KSFT_FAIL); + } + /* + * Test reaping while process is alive with no pending SIGKILL. + * Expect to fail with EINVAL error code. + */ + if (!syscall(__NR_process_mrelease, pidfd, 0) || errno != EINVAL) { + perror("process_mrelease on a live process"); + exit(errno == ENOSYS ? KSFT_SKIP : KSFT_FAIL); + } +} + +static int child_main(int pipefd[], size_t size) +{ + int res; + + /* Allocate and fault-in memory and wait to be killed */ + close(pipefd[0]); + res = alloc_noexit(MB(size) / PAGE_SIZE, pipefd[1]); + close(pipefd[1]); + return res; +} + +int main(void) +{ + int pipefd[2], pidfd; + bool success, retry; + size_t size; + pid_t pid; + char byte; + int res; + + /* Test a wrong pidfd */ + if (!syscall(__NR_process_mrelease, -1, 0) || errno != EBADF) { + perror("process_mrelease with wrong pidfd"); + exit(errno == ENOSYS ? KSFT_SKIP : KSFT_FAIL); + } + + /* Start the test with 1MB child memory allocation */ + size = 1; +retry: + /* + * Pipe for the child to signal when it's done allocating + * memory + */ + if (pipe(pipefd)) { + perror("pipe"); + exit(KSFT_FAIL); + } + pid = fork(); + if (pid < 0) { + perror("fork"); + close(pipefd[0]); + close(pipefd[1]); + exit(KSFT_FAIL); + } + + if (pid == 0) { + /* Child main routine */ + res = child_main(pipefd, size); + exit(res); + } + + /* + * Parent main routine: + * Wait for the child to finish allocations, then kill and reap + */ + close(pipefd[1]); + /* Block until the child is ready */ + res = read(pipefd[0], &byte, 1); + close(pipefd[0]); + if (res < 0) { + perror("read"); + if (!kill(pid, SIGKILL)) + waitpid(pid, NULL, 0); + exit(KSFT_FAIL); + } + + pidfd = syscall(__NR_pidfd_open, pid, 0); + if (pidfd < 0) { + perror("pidfd_open"); + if (!kill(pid, SIGKILL)) + waitpid(pid, NULL, 0); + exit(KSFT_FAIL); + } + + /* Run negative tests which require a live child */ + run_negative_tests(pidfd); + + if (kill(pid, SIGKILL)) { + perror("kill"); + exit(errno == ENOSYS ? KSFT_SKIP : KSFT_FAIL); + } + + success = (syscall(__NR_process_mrelease, pidfd, 0) == 0); + if (!success) { + /* + * If we failed to reap because the child exited too soon, + * before we could call process_mrelease. Double child's memory + * which causes it to spend more time on cleanup and increases + * our chances of reaping its memory before it exits. + * Retry until we succeed or reach MAX_SIZE_MB. + */ + if (errno == ESRCH) { + retry = (size <= MAX_SIZE_MB); + } else { + perror("process_mrelease"); + waitpid(pid, NULL, 0); + exit(errno == ENOSYS ? KSFT_SKIP : KSFT_FAIL); + } + } + + /* Cleanup to prevent zombies */ + if (waitpid(pid, NULL, 0) < 0) { + perror("waitpid"); + exit(KSFT_FAIL); + } + close(pidfd); + + if (!success) { + if (retry) { + size *= 2; + goto retry; + } + printf("All process_mrelease attempts failed!\n"); + exit(KSFT_FAIL); + } + + printf("Success reaping a child with %zuMB of memory allocations\n", + size); + return KSFT_PASS; +} diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c index 2d0ae88665db..291bc1e07842 100644 --- a/tools/testing/selftests/vm/protection_keys.c +++ b/tools/testing/selftests/vm/protection_keys.c @@ -1523,7 +1523,7 @@ void test_implicit_mprotect_exec_only_memory(int *ptr, u16 pkey) /* * Reset the shadow, assuming that the above mprotect() * correctly changed PKRU, but to an unknown value since - * the actual alllocated pkey is unknown. + * the actual allocated pkey is unknown. */ shadow_pkey_reg = __read_pkey_reg(); diff --git a/tools/testing/selftests/vm/run_vmtests.sh b/tools/testing/selftests/vm/run_vmtests.sh index 352ba00cf26b..41fce8bea929 100755 --- a/tools/testing/selftests/vm/run_vmtests.sh +++ b/tools/testing/selftests/vm/run_vmtests.sh @@ -9,12 +9,12 @@ mnt=./huge exitcode=0 #get huge pagesize and freepages from /proc/meminfo -while read name size unit; do +while read -r name size unit; do if [ "$name" = "HugePages_Free:" ]; then - freepgs=$size + freepgs="$size" fi if [ "$name" = "Hugepagesize:" ]; then - hpgsize_KB=$size + hpgsize_KB="$size" fi done < /proc/meminfo @@ -30,27 +30,26 @@ needmem_KB=$((half_ufd_size_MB * 2 * 1024)) #set proper nr_hugepages if [ -n "$freepgs" ] && [ -n "$hpgsize_KB" ]; then - nr_hugepgs=`cat /proc/sys/vm/nr_hugepages` + nr_hugepgs=$(cat /proc/sys/vm/nr_hugepages) needpgs=$((needmem_KB / hpgsize_KB)) tries=2 - while [ $tries -gt 0 ] && [ $freepgs -lt $needpgs ]; do - lackpgs=$(( $needpgs - $freepgs )) + while [ "$tries" -gt 0 ] && [ "$freepgs" -lt "$needpgs" ]; do + lackpgs=$((needpgs - freepgs)) echo 3 > /proc/sys/vm/drop_caches - echo $(( $lackpgs + $nr_hugepgs )) > /proc/sys/vm/nr_hugepages - if [ $? -ne 0 ]; then + if ! echo $((lackpgs + nr_hugepgs)) > /proc/sys/vm/nr_hugepages; then echo "Please run this test as root" exit $ksft_skip fi - while read name size unit; do + while read -r name size unit; do if [ "$name" = "HugePages_Free:" ]; then freepgs=$size fi done < /proc/meminfo tries=$((tries - 1)) done - if [ $freepgs -lt $needpgs ]; then + if [ "$freepgs" -lt "$needpgs" ]; then printf "Not enough huge pages available (%d < %d)\n" \ - $freepgs $needpgs + "$freepgs" "$needpgs" exit 1 fi else @@ -60,458 +59,124 @@ fi #filter 64bit architectures ARCH64STR="arm64 ia64 mips64 parisc64 ppc64 ppc64le riscv64 s390x sh64 sparc64 x86_64" -if [ -z $ARCH ]; then - ARCH=`uname -m 2>/dev/null | sed -e 's/aarch64.*/arm64/'` +if [ -z "$ARCH" ]; then + ARCH=$(uname -m 2>/dev/null | sed -e 's/aarch64.*/arm64/') fi VADDR64=0 -echo "$ARCH64STR" | grep $ARCH && VADDR64=1 - -mkdir $mnt -mount -t hugetlbfs none $mnt - -echo "---------------------" -echo "running hugepage-mmap" -echo "---------------------" -./hugepage-mmap -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi +echo "$ARCH64STR" | grep "$ARCH" && VADDR64=1 + +# Usage: run_test [test binary] [arbitrary test arguments...] +run_test() { + local title="running $*" + local sep=$(echo -n "$title" | tr "[:graph:][:space:]" -) + printf "%s\n%s\n%s\n" "$sep" "$title" "$sep" + + "$@" + local ret=$? + if [ $ret -eq 0 ]; then + echo "[PASS]" + elif [ $ret -eq $ksft_skip ]; then + echo "[SKIP]" + exitcode=$ksft_skip + else + echo "[FAIL]" + exitcode=1 + fi +} -shmmax=`cat /proc/sys/kernel/shmmax` -shmall=`cat /proc/sys/kernel/shmall` +mkdir "$mnt" +mount -t hugetlbfs none "$mnt" + +run_test ./hugepage-mmap + +shmmax=$(cat /proc/sys/kernel/shmmax) +shmall=$(cat /proc/sys/kernel/shmall) echo 268435456 > /proc/sys/kernel/shmmax echo 4194304 > /proc/sys/kernel/shmall -echo "--------------------" -echo "running hugepage-shm" -echo "--------------------" -./hugepage-shm -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi -echo $shmmax > /proc/sys/kernel/shmmax -echo $shmall > /proc/sys/kernel/shmall - -echo "-------------------" -echo "running map_hugetlb" -echo "-------------------" -./map_hugetlb -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi +run_test ./hugepage-shm +echo "$shmmax" > /proc/sys/kernel/shmmax +echo "$shmall" > /proc/sys/kernel/shmall -echo "-----------------------" -echo "running hugepage-mremap" -echo "-----------------------" -./hugepage-mremap $mnt/huge_mremap -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi -rm -f $mnt/huge_mremap - -echo "------------------------" -echo "running hugepage-vmemmap" -echo "------------------------" -./hugepage-vmemmap -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi +run_test ./map_hugetlb -echo "-----------------------" -echo "running hugetlb-madvise" -echo "-----------------------" -./hugetlb-madvise $mnt/madvise-test -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi -rm -f $mnt/madvise-test +run_test ./hugepage-mremap "$mnt"/huge_mremap +rm -f "$mnt"/huge_mremap + +run_test ./hugepage-vmemmap + +run_test ./hugetlb-madvise "$mnt"/madvise-test +rm -f "$mnt"/madvise-test echo "NOTE: The above hugetlb tests provide minimal coverage. Use" echo " https://github.com/libhugetlbfs/libhugetlbfs.git for" echo " hugetlb regression testing." -echo "---------------------------" -echo "running map_fixed_noreplace" -echo "---------------------------" -./map_fixed_noreplace -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi +run_test ./map_fixed_noreplace -echo "------------------------------------------------------" -echo "running: gup_test -u # get_user_pages_fast() benchmark" -echo "------------------------------------------------------" -./gup_test -u -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi +# get_user_pages_fast() benchmark +run_test ./gup_test -u +# pin_user_pages_fast() benchmark +run_test ./gup_test -a +# Dump pages 0, 19, and 4096, using pin_user_pages: +run_test ./gup_test -ct -F 0x1 0 19 0x1000 -echo "------------------------------------------------------" -echo "running: gup_test -a # pin_user_pages_fast() benchmark" -echo "------------------------------------------------------" -./gup_test -a -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi - -echo "------------------------------------------------------------" -echo "# Dump pages 0, 19, and 4096, using pin_user_pages:" -echo "running: gup_test -ct -F 0x1 0 19 0x1000 # dump_page() test" -echo "------------------------------------------------------------" -./gup_test -ct -F 0x1 0 19 0x1000 -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi - -echo "-------------------" -echo "running userfaultfd" -echo "-------------------" -./userfaultfd anon 20 16 -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi - -echo "---------------------------" -echo "running userfaultfd_hugetlb" -echo "---------------------------" +run_test ./userfaultfd anon 20 16 # Test requires source and destination huge pages. Size of source # (half_ufd_size_MB) is passed as argument to test. -./userfaultfd hugetlb $half_ufd_size_MB 32 -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi - -echo "-------------------------" -echo "running userfaultfd_shmem" -echo "-------------------------" -./userfaultfd shmem 20 16 -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi +run_test ./userfaultfd hugetlb "$half_ufd_size_MB" 32 +run_test ./userfaultfd shmem 20 16 #cleanup -umount $mnt -rm -rf $mnt -echo $nr_hugepgs > /proc/sys/vm/nr_hugepages - -echo "-----------------------" -echo "running compaction_test" -echo "-----------------------" -./compaction_test -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi - -echo "----------------------" -echo "running on-fault-limit" -echo "----------------------" -sudo -u nobody ./on-fault-limit -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi - -echo "--------------------" -echo "running map_populate" -echo "--------------------" -./map_populate -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi +umount "$mnt" +rm -rf "$mnt" +echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages -echo "-------------------------" -echo "running mlock-random-test" -echo "-------------------------" -./mlock-random-test -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi +run_test ./compaction_test -echo "--------------------" -echo "running mlock2-tests" -echo "--------------------" -./mlock2-tests -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi +run_test sudo -u nobody ./on-fault-limit -echo "-------------------" -echo "running mremap_test" -echo "-------------------" -./mremap_test -ret_val=$? - -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi - -echo "-----------------" -echo "running thuge-gen" -echo "-----------------" -./thuge-gen -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi - -if [ $VADDR64 -ne 0 ]; then -echo "-----------------------------" -echo "running virtual_address_range" -echo "-----------------------------" -./virtual_address_range -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi +run_test ./map_populate -echo "-----------------------------" -echo "running virtual address 128TB switch test" -echo "-----------------------------" -./va_128TBswitch -if [ $? -ne 0 ]; then - echo "[FAIL]" - exitcode=1 -else - echo "[PASS]" -fi -fi # VADDR64 +run_test ./mlock-random-test -echo "------------------------------------" -echo "running vmalloc stability smoke test" -echo "------------------------------------" -./test_vmalloc.sh smoke -ret_val=$? - -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi +run_test ./mlock2-tests -echo "------------------------------------" -echo "running MREMAP_DONTUNMAP smoke test" -echo "------------------------------------" -./mremap_dontunmap -ret_val=$? - -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi +run_test ./mrelease_test -echo "running HMM smoke test" -echo "------------------------------------" -./test_hmm.sh smoke -ret_val=$? +run_test ./mremap_test -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi +run_test ./thuge-gen -echo "--------------------------------------------------------" -echo "running MADV_POPULATE_READ and MADV_POPULATE_WRITE tests" -echo "--------------------------------------------------------" -./madv_populate -ret_val=$? - -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi +if [ $VADDR64 -ne 0 ]; then + run_test ./virtual_address_range -echo "running memfd_secret test" -echo "------------------------------------" -./memfd_secret -ret_val=$? + # virtual address 128TB switch test + run_test ./va_128TBswitch +fi # VADDR64 -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi +# vmalloc stability smoke test +run_test ./test_vmalloc.sh smoke -echo "-------------------------------------------------------" -echo "running KSM MADV_MERGEABLE test with 10 identical pages" -echo "-------------------------------------------------------" -./ksm_tests -M -p 10 -ret_val=$? - -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi +run_test ./mremap_dontunmap -echo "------------------------" -echo "running KSM unmerge test" -echo "------------------------" -./ksm_tests -U -ret_val=$? - -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi +run_test ./test_hmm.sh smoke -echo "----------------------------------------------------------" -echo "running KSM test with 10 zero pages and use_zero_pages = 0" -echo "----------------------------------------------------------" -./ksm_tests -Z -p 10 -z 0 -ret_val=$? - -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi - -echo "----------------------------------------------------------" -echo "running KSM test with 10 zero pages and use_zero_pages = 1" -echo "----------------------------------------------------------" -./ksm_tests -Z -p 10 -z 1 -ret_val=$? - -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi - -echo "-------------------------------------------------------------" -echo "running KSM test with 2 NUMA nodes and merge_across_nodes = 1" -echo "-------------------------------------------------------------" -./ksm_tests -N -m 1 -ret_val=$? - -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi +# MADV_POPULATE_READ and MADV_POPULATE_WRITE tests +run_test ./madv_populate -echo "-------------------------------------------------------------" -echo "running KSM test with 2 NUMA nodes and merge_across_nodes = 0" -echo "-------------------------------------------------------------" -./ksm_tests -N -m 0 -ret_val=$? - -if [ $ret_val -eq 0 ]; then - echo "[PASS]" -elif [ $ret_val -eq $ksft_skip ]; then - echo "[SKIP]" - exitcode=$ksft_skip -else - echo "[FAIL]" - exitcode=1 -fi +run_test ./memfd_secret -exit $exitcode +# KSM MADV_MERGEABLE test with 10 identical pages +run_test ./ksm_tests -M -p 10 +# KSM unmerge test +run_test ./ksm_tests -U +# KSM test with 10 zero pages and use_zero_pages = 0 +run_test ./ksm_tests -Z -p 10 -z 0 +# KSM test with 10 zero pages and use_zero_pages = 1 +run_test ./ksm_tests -Z -p 10 -z 1 +# KSM test with 2 NUMA nodes and merge_across_nodes = 1 +run_test ./ksm_tests -N -m 1 +# KSM test with 2 NUMA nodes and merge_across_nodes = 0 +run_test ./ksm_tests -N -m 0 exit $exitcode diff --git a/tools/testing/selftests/vm/settings b/tools/testing/selftests/vm/settings new file mode 100644 index 000000000000..9abfc60e9e6f --- /dev/null +++ b/tools/testing/selftests/vm/settings @@ -0,0 +1 @@ +timeout=45 diff --git a/tools/testing/selftests/vm/soft-dirty.c b/tools/testing/selftests/vm/soft-dirty.c new file mode 100644 index 000000000000..08ab62a4a9d0 --- /dev/null +++ b/tools/testing/selftests/vm/soft-dirty.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <stdio.h> +#include <string.h> +#include <stdbool.h> +#include <fcntl.h> +#include <stdint.h> +#include <malloc.h> +#include <sys/mman.h> +#include "../kselftest.h" +#include "vm_util.h" + +#define PAGEMAP_FILE_PATH "/proc/self/pagemap" +#define TEST_ITERATIONS 10000 + +static void test_simple(int pagemap_fd, int pagesize) +{ + int i; + char *map; + + map = aligned_alloc(pagesize, pagesize); + if (!map) + ksft_exit_fail_msg("mmap failed\n"); + + clear_softdirty(); + + for (i = 0 ; i < TEST_ITERATIONS; i++) { + if (pagemap_is_softdirty(pagemap_fd, map) == 1) { + ksft_print_msg("dirty bit was 1, but should be 0 (i=%d)\n", i); + break; + } + + clear_softdirty(); + // Write something to the page to get the dirty bit enabled on the page + map[0]++; + + if (pagemap_is_softdirty(pagemap_fd, map) == 0) { + ksft_print_msg("dirty bit was 0, but should be 1 (i=%d)\n", i); + break; + } + + clear_softdirty(); + } + free(map); + + ksft_test_result(i == TEST_ITERATIONS, "Test %s\n", __func__); +} + +static void test_vma_reuse(int pagemap_fd, int pagesize) +{ + char *map, *map2; + + map = mmap(NULL, pagesize, (PROT_READ | PROT_WRITE), (MAP_PRIVATE | MAP_ANON), -1, 0); + if (map == MAP_FAILED) + ksft_exit_fail_msg("mmap failed"); + + // The kernel always marks new regions as soft dirty + ksft_test_result(pagemap_is_softdirty(pagemap_fd, map) == 1, + "Test %s dirty bit of allocated page\n", __func__); + + clear_softdirty(); + munmap(map, pagesize); + + map2 = mmap(NULL, pagesize, (PROT_READ | PROT_WRITE), (MAP_PRIVATE | MAP_ANON), -1, 0); + if (map2 == MAP_FAILED) + ksft_exit_fail_msg("mmap failed"); + + // Dirty bit is set for new regions even if they are reused + if (map == map2) + ksft_test_result(pagemap_is_softdirty(pagemap_fd, map2) == 1, + "Test %s dirty bit of reused address page\n", __func__); + else + ksft_test_result_skip("Test %s dirty bit of reused address page\n", __func__); + + munmap(map2, pagesize); +} + +static void test_hugepage(int pagemap_fd, int pagesize) +{ + char *map; + int i, ret; + size_t hpage_len = read_pmd_pagesize(); + + map = memalign(hpage_len, hpage_len); + if (!map) + ksft_exit_fail_msg("memalign failed\n"); + + ret = madvise(map, hpage_len, MADV_HUGEPAGE); + if (ret) + ksft_exit_fail_msg("madvise failed %d\n", ret); + + for (i = 0; i < hpage_len; i++) + map[i] = (char)i; + + if (check_huge(map)) { + ksft_test_result_pass("Test %s huge page allocation\n", __func__); + + clear_softdirty(); + for (i = 0 ; i < TEST_ITERATIONS ; i++) { + if (pagemap_is_softdirty(pagemap_fd, map) == 1) { + ksft_print_msg("dirty bit was 1, but should be 0 (i=%d)\n", i); + break; + } + + clear_softdirty(); + // Write something to the page to get the dirty bit enabled on the page + map[0]++; + + if (pagemap_is_softdirty(pagemap_fd, map) == 0) { + ksft_print_msg("dirty bit was 0, but should be 1 (i=%d)\n", i); + break; + } + clear_softdirty(); + } + + ksft_test_result(i == TEST_ITERATIONS, "Test %s huge page dirty bit\n", __func__); + } else { + // hugepage allocation failed. skip these tests + ksft_test_result_skip("Test %s huge page allocation\n", __func__); + ksft_test_result_skip("Test %s huge page dirty bit\n", __func__); + } + free(map); +} + +int main(int argc, char **argv) +{ + int pagemap_fd; + int pagesize; + + ksft_print_header(); + ksft_set_plan(5); + + pagemap_fd = open(PAGEMAP_FILE_PATH, O_RDONLY); + if (pagemap_fd < 0) + ksft_exit_fail_msg("Failed to open %s\n", PAGEMAP_FILE_PATH); + + pagesize = getpagesize(); + + test_simple(pagemap_fd, pagesize); + test_vma_reuse(pagemap_fd, pagesize); + test_hugepage(pagemap_fd, pagesize); + + close(pagemap_fd); + + return ksft_exit_pass(); +} diff --git a/tools/testing/selftests/vm/split_huge_page_test.c b/tools/testing/selftests/vm/split_huge_page_test.c index 52497b7b9f1d..6aa2b8253aed 100644 --- a/tools/testing/selftests/vm/split_huge_page_test.c +++ b/tools/testing/selftests/vm/split_huge_page_test.c @@ -16,14 +16,13 @@ #include <sys/mount.h> #include <malloc.h> #include <stdbool.h> +#include "vm_util.h" uint64_t pagesize; unsigned int pageshift; uint64_t pmd_pagesize; -#define PMD_SIZE_PATH "/sys/kernel/mm/transparent_hugepage/hpage_pmd_size" #define SPLIT_DEBUGFS "/sys/kernel/debug/split_huge_pages" -#define SMAP_PATH "/proc/self/smaps" #define INPUT_MAX 80 #define PID_FMT "%d,0x%lx,0x%lx" @@ -51,30 +50,6 @@ int is_backed_by_thp(char *vaddr, int pagemap_file, int kpageflags_file) return 0; } - -static uint64_t read_pmd_pagesize(void) -{ - int fd; - char buf[20]; - ssize_t num_read; - - fd = open(PMD_SIZE_PATH, O_RDONLY); - if (fd == -1) { - perror("Open hpage_pmd_size failed"); - exit(EXIT_FAILURE); - } - num_read = read(fd, buf, 19); - if (num_read < 1) { - close(fd); - perror("Read hpage_pmd_size failed"); - exit(EXIT_FAILURE); - } - buf[num_read] = '\0'; - close(fd); - - return strtoul(buf, NULL, 10); -} - static int write_file(const char *path, const char *buf, size_t buflen) { int fd; @@ -113,58 +88,6 @@ static void write_debugfs(const char *fmt, ...) } } -#define MAX_LINE_LENGTH 500 - -static bool check_for_pattern(FILE *fp, const char *pattern, char *buf) -{ - while (fgets(buf, MAX_LINE_LENGTH, fp) != NULL) { - if (!strncmp(buf, pattern, strlen(pattern))) - return true; - } - return false; -} - -static uint64_t check_huge(void *addr) -{ - uint64_t thp = 0; - int ret; - FILE *fp; - char buffer[MAX_LINE_LENGTH]; - char addr_pattern[MAX_LINE_LENGTH]; - - ret = snprintf(addr_pattern, MAX_LINE_LENGTH, "%08lx-", - (unsigned long) addr); - if (ret >= MAX_LINE_LENGTH) { - printf("%s: Pattern is too long\n", __func__); - exit(EXIT_FAILURE); - } - - - fp = fopen(SMAP_PATH, "r"); - if (!fp) { - printf("%s: Failed to open file %s\n", __func__, SMAP_PATH); - exit(EXIT_FAILURE); - } - if (!check_for_pattern(fp, addr_pattern, buffer)) - goto err_out; - - /* - * Fetch the AnonHugePages: in the same block and check the number of - * hugepages. - */ - if (!check_for_pattern(fp, "AnonHugePages:", buffer)) - goto err_out; - - if (sscanf(buffer, "AnonHugePages:%10ld kB", &thp) != 1) { - printf("Reading smap error\n"); - exit(EXIT_FAILURE); - } - -err_out: - fclose(fp); - return thp; -} - void split_pmd_thp(void) { char *one_page; diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index 92a4516f8f0d..0bdfc1955229 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -82,7 +82,7 @@ static int test_type; static volatile bool test_uffdio_copy_eexist = true; static volatile bool test_uffdio_zeropage_eexist = true; /* Whether to test uffd write-protection */ -static bool test_uffdio_wp = false; +static bool test_uffdio_wp = true; /* Whether to test uffd minor faults */ static bool test_uffdio_minor = false; @@ -1422,7 +1422,6 @@ static void userfaultfd_pagemap_test(unsigned int test_pgsize) static int userfaultfd_stress(void) { void *area; - char *tmp_area; unsigned long nr; struct uffdio_register uffdio_register; struct uffd_stats uffd_stats[nr_cpus]; @@ -1533,13 +1532,9 @@ static int userfaultfd_stress(void) count_verify[nr], nr); /* prepare next bounce */ - tmp_area = area_src; - area_src = area_dst; - area_dst = tmp_area; + swap(area_src, area_dst); - tmp_area = area_src_alias; - area_src_alias = area_dst_alias; - area_dst_alias = tmp_area; + swap(area_src_alias, area_dst_alias); uffd_stats_report(uffd_stats, nr_cpus); } @@ -1594,8 +1589,6 @@ static void set_test_type(const char *type) if (!strcmp(type, "anon")) { test_type = TEST_ANON; uffd_test_ops = &anon_uffd_test_ops; - /* Only enable write-protect test for anonymous test */ - test_uffdio_wp = true; } else if (!strcmp(type, "hugetlb")) { test_type = TEST_HUGETLB; uffd_test_ops = &hugetlb_uffd_test_ops; diff --git a/tools/testing/selftests/vm/vm_util.c b/tools/testing/selftests/vm/vm_util.c new file mode 100644 index 000000000000..b58ab11a7a30 --- /dev/null +++ b/tools/testing/selftests/vm/vm_util.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <string.h> +#include <fcntl.h> +#include "../kselftest.h" +#include "vm_util.h" + +#define PMD_SIZE_FILE_PATH "/sys/kernel/mm/transparent_hugepage/hpage_pmd_size" +#define SMAP_FILE_PATH "/proc/self/smaps" +#define MAX_LINE_LENGTH 500 + +uint64_t pagemap_get_entry(int fd, char *start) +{ + const unsigned long pfn = (unsigned long)start / getpagesize(); + uint64_t entry; + int ret; + + ret = pread(fd, &entry, sizeof(entry), pfn * sizeof(entry)); + if (ret != sizeof(entry)) + ksft_exit_fail_msg("reading pagemap failed\n"); + return entry; +} + +bool pagemap_is_softdirty(int fd, char *start) +{ + uint64_t entry = pagemap_get_entry(fd, start); + + // Check if dirty bit (55th bit) is set + return entry & 0x0080000000000000ull; +} + +void clear_softdirty(void) +{ + int ret; + const char *ctrl = "4"; + int fd = open("/proc/self/clear_refs", O_WRONLY); + + if (fd < 0) + ksft_exit_fail_msg("opening clear_refs failed\n"); + ret = write(fd, ctrl, strlen(ctrl)); + close(fd); + if (ret != strlen(ctrl)) + ksft_exit_fail_msg("writing clear_refs failed\n"); +} + +static bool check_for_pattern(FILE *fp, const char *pattern, char *buf) +{ + while (fgets(buf, MAX_LINE_LENGTH, fp) != NULL) { + if (!strncmp(buf, pattern, strlen(pattern))) + return true; + } + return false; +} + +uint64_t read_pmd_pagesize(void) +{ + int fd; + char buf[20]; + ssize_t num_read; + + fd = open(PMD_SIZE_FILE_PATH, O_RDONLY); + if (fd == -1) + ksft_exit_fail_msg("Open hpage_pmd_size failed\n"); + + num_read = read(fd, buf, 19); + if (num_read < 1) { + close(fd); + ksft_exit_fail_msg("Read hpage_pmd_size failed\n"); + } + buf[num_read] = '\0'; + close(fd); + + return strtoul(buf, NULL, 10); +} + +uint64_t check_huge(void *addr) +{ + uint64_t thp = 0; + int ret; + FILE *fp; + char buffer[MAX_LINE_LENGTH]; + char addr_pattern[MAX_LINE_LENGTH]; + + ret = snprintf(addr_pattern, MAX_LINE_LENGTH, "%08lx-", + (unsigned long) addr); + if (ret >= MAX_LINE_LENGTH) + ksft_exit_fail_msg("%s: Pattern is too long\n", __func__); + + fp = fopen(SMAP_FILE_PATH, "r"); + if (!fp) + ksft_exit_fail_msg("%s: Failed to open file %s\n", __func__, SMAP_FILE_PATH); + + if (!check_for_pattern(fp, addr_pattern, buffer)) + goto err_out; + + /* + * Fetch the AnonHugePages: in the same block and check the number of + * hugepages. + */ + if (!check_for_pattern(fp, "AnonHugePages:", buffer)) + goto err_out; + + if (sscanf(buffer, "AnonHugePages:%10ld kB", &thp) != 1) + ksft_exit_fail_msg("Reading smap error\n"); + +err_out: + fclose(fp); + return thp; +} diff --git a/tools/testing/selftests/vm/vm_util.h b/tools/testing/selftests/vm/vm_util.h new file mode 100644 index 000000000000..2e512bd57ae1 --- /dev/null +++ b/tools/testing/selftests/vm/vm_util.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#include <stdint.h> +#include <stdbool.h> + +uint64_t pagemap_get_entry(int fd, char *start); +bool pagemap_is_softdirty(int fd, char *start); +void clear_softdirty(void); +uint64_t read_pmd_pagesize(void); +uint64_t check_huge(void *addr); |