The patch titled
Subject: latencytop: use the last element of latency_record of system
has been added to the -mm mm-nonmm-unstable branch. Its filename is
latencytop-use-the-last-element-of-latency_record-of-system.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/latencytop-use-the-last-element-of-latency_record-of-system.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: wuchi <wuchi.zero@xxxxxxxxx>
Subject: latencytop: use the last element of latency_record of system
Date: Sat, 3 Sep 2022 21:52:33 +0800
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@xxxxxxxxx
Signed-off-by: wuchi <wuchi.zero@xxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/latencytop.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/kernel/latencytop.c~latencytop-use-the-last-element-of-latency_record-of-system
+++ a/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
}
i = firstnonnull;
- if (i >= MAXLR - 1)
+ if (i >= MAXLR)
return;
/* Allocted a new one: */
_
Patches currently in -mm which might be from wuchi.zero@xxxxxxxxx are
lib-debugobjects-fix-stat-count-and-optimize-debug_objects_mem_init.patch
initramfs-mask-my_inptr-as-__initdata.patch
profile-simplify-redundant-code-in-profile_setup.patch
latencytop-use-the-last-element-of-latency_record-of-system.patch
