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| author | wuchi <wuchi.zero@gmail.com> | 2022-09-03 21:52:33 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-09-11 21:55:12 -0700 |
| commit | b814751175470b00969a317bf3192260750f9455 (patch) | |
| tree | 6cdb3665e3f05449771b5c27c1591dc9982feb0d /kernel | |
| parent | bfca3dd3d0680fc2fc7f659a152234afbac26e4d (diff) | |
| download | linux-stable-b814751175470b00969a317bf3192260750f9455.tar.gz linux-stable-b814751175470b00969a317bf3192260750f9455.tar.bz2 linux-stable-b814751175470b00969a317bf3192260750f9455.zip | |
latencytop: use the last element of latency_record of system
In account_global_scheduler_latency(), when we don't find the matching
latency_record we try to select one which is unused in
latency_record[MAXLR], but the condition will skip the last one.
if (i >= MAXLR-1)
Fix that.
Link: https://lkml.kernel.org/r/20220903135233.5225-1-wuchi.zero@gmail.com
Signed-off-by: wuchi <wuchi.zero@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foudation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/latencytop.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/latencytop.c b/kernel/latencytop.c index 76166df011a4..781249098cb6 100644 --- a/kernel/latencytop.c +++ b/kernel/latencytop.c @@ -112,7 +112,7 @@ static void __sched account_global_scheduler_latency(struct task_struct *tsk, struct latency_record *lat) { - int firstnonnull = MAXLR + 1; + int firstnonnull = MAXLR; int i; /* skip kernel threads for now */ @@ -150,7 +150,7 @@ account_global_scheduler_latency(struct task_struct *tsk, } i = firstnonnull; - if (i >= MAXLR - 1) + if (i >= MAXLR) return; /* Allocted a new one: */ |