From: wuchi <wuchi.zero@gmail.com>
To: mcgrof@kernel.org, viro@zeniv.linux.org.uk, akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] latencytop: use the last element of latency_record of system
Date: Sat, 3 Sep 2022 21:52:33 +0800 [thread overview]
Message-ID: <20220903135233.5225-1-wuchi.zero@gmail.com> (raw)
In function account_global_scheduler_latency(), when we don't find
the matching latency_record, 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.
Signed-off-by: wuchi <wuchi.zero@gmail.com>
---
kernel/latencytop.c | 4 ++--
1 file 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: */
--
2.20.1
reply other threads:[~2022-09-03 13:52 UTC|newest]
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