From b696722d784fb3610183281d2fd514b0efe97e3b Mon Sep 17 00:00:00 2001 From: Hyeongtak Ji Date: Fri, 14 Jun 2024 12:00:08 +0900 Subject: mm/damon/paddr: introduce DAMOS_MIGRATE_HOT action for promotion This patch introduces DAMOS_MIGRATE_HOT action, which is similar to DAMOS_MIGRATE_COLD, but proritizes hot pages. It migrates pages inside the given region to the 'target_nid' NUMA node in the sysfs. Here is one of the example usage of this 'migrate_hot' action. $ cd /sys/kernel/mm/damon/admin/kdamonds/ $ cat contexts//schemes//action migrate_hot $ echo 0 > contexts//schemes//target_nid $ echo commit > state $ numactl -p 2 ./hot_cold 500M 600M & $ numastat -c -p hot_cold Per-node process memory usage (in MBs) PID Node 0 Node 1 Node 2 Total -------------- ------ ------ ------ ----- 701 (hot_cold) 501 0 601 1101 Link: https://lkml.kernel.org/r/20240614030010.751-7-honggyu.kim@sk.com Signed-off-by: Hyeongtak Ji Signed-off-by: Honggyu Kim Signed-off-by: SeongJae Park Cc: Gregory Price Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Masami Hiramatsu (Google) Cc: Mathieu Desnoyers Cc: Rakie Kim Cc: Steven Rostedt (Google) Signed-off-by: Andrew Morton --- mm/damon/paddr.c | 3 +++ mm/damon/sysfs-schemes.c | 1 + 2 files changed, 4 insertions(+) (limited to 'mm/damon') diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index 882ae54af829..af6aac388a43 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -486,6 +486,7 @@ static unsigned long damon_pa_apply_scheme(struct damon_ctx *ctx, return damon_pa_mark_accessed(r, scheme); case DAMOS_LRU_DEPRIO: return damon_pa_deactivate_pages(r, scheme); + case DAMOS_MIGRATE_HOT: case DAMOS_MIGRATE_COLD: return damon_pa_migrate(r, scheme); case DAMOS_STAT: @@ -508,6 +509,8 @@ static int damon_pa_scheme_score(struct damon_ctx *context, return damon_hot_score(context, r, scheme); case DAMOS_LRU_DEPRIO: return damon_cold_score(context, r, scheme); + case DAMOS_MIGRATE_HOT: + return damon_hot_score(context, r, scheme); case DAMOS_MIGRATE_COLD: return damon_cold_score(context, r, scheme); default: diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 880015d5b5ea..66fccfa776d7 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -1458,6 +1458,7 @@ static const char * const damon_sysfs_damos_action_strs[] = { "nohugepage", "lru_prio", "lru_deprio", + "migrate_hot", "migrate_cold", "stat", }; -- cgit v1.2.3-70-g09d2