diff options
| author | Xiu Jianfeng <[email protected]> | 2024-06-28 07:23:33 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2024-07-04 18:05:59 -0700 |
| commit | c2fad56b3c12a5fc6ea7426d2e39459e85e5b55e (patch) | |
| tree | 4939d27cf644df8d973ba2658b213e2171869733 | |
| parent | 1c46cc09896f3c2a896c152bcfb8c2987810fde5 (diff) | |
mm: memcg: adjust the warning when seq_buf overflows
Currently it uses WARN_ON_ONCE() if seq_buf overflows when user reads
memory.stat, the only advantage of WARN_ON_ONCE is that the splat is so
verbose that it gets noticed. And also it panics the system if
panic_on_warn is enabled. It seems like the warning is just an over
reaction and a simple pr_warn should just achieve the similar effect.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Xiu Jianfeng <[email protected]>
Suggested-by: Michal Hocko <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Muchun Song <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Shakeel Butt <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
| -rw-r--r-- | mm/memcontrol.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index d0d9658ed136..500a4dba9733 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1484,7 +1484,8 @@ static void memory_stat_format(struct mem_cgroup *memcg, struct seq_buf *s) memcg_stat_format(memcg, s); else memcg1_stat_format(memcg, s); - WARN_ON_ONCE(seq_buf_has_overflowed(s)); + if (seq_buf_has_overflowed(s)) + pr_warn("%s: Warning, stat buffer overflow, please report\n", __func__); } /** |