diff options
| author | Kairui Song <kasong@tencent.com> | 2022-10-24 00:25:33 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-11-08 17:37:22 -0800 |
| commit | ea0ffd0c08d0fef1f6e93eb07badbeeabf6b43d6 (patch) | |
| tree | 7c51a3389015d022f9a2b98a2157e2de31216605 /kernel/sysctl.c | |
| parent | 5033091de814ab4b5623faed2755f3064e19e2d2 (diff) | |
swap: add a limit for readahead page-cluster value
Currenty there is no upper limit for /proc/sys/vm/page-cluster, and it's a
bit shift value, so it could result in overflow of the 32-bit integer.
Add a reasonable upper limit for it, read-in at most 2**31 pages, which is
a large enough value for readahead.
Link: https://lkml.kernel.org/r/20221023162533.81561-1-ryncsn@gmail.com
Signed-off-by: Kairui Song <kasong@tencent.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/sysctl.c')
| -rw-r--r-- | kernel/sysctl.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 188c305aeb8b..71a4350ac601 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -2125,6 +2125,7 @@ static struct ctl_table vm_table[] = { .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, + .extra2 = (void *)&page_cluster_max, }, { .procname = "dirtytime_expire_seconds", |