The following commit has been merged into the timers/core branch of tip:
Commit-ID: a7e282c77785c7eabf98836431b1f029481085ad
Gitweb: https://git.kernel.org/tip/a7e282c77785c7eabf98836431b1f029481085ad
Author: Wen Yang <wenyang.linux@xxxxxxxxxxx>
AuthorDate: Fri, 05 May 2023 00:12:53 +08:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Sun, 18 Jun 2023 22:41:53 +02:00
tick/rcu: Fix bogus ratelimit condition
The ratelimit logic in report_idle_softirq() is broken because the
exit condition is always true:
static int ratelimit;
if (ratelimit < 10)
return false; ---> always returns here
ratelimit++; ---> no chance to run
Make it check for >= 10 instead.
Fixes: 0345691b24c0 ("tick/rcu: Stop allowing RCU_SOFTIRQ in idle")
Signed-off-by: Wen Yang <wenyang.linux@xxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/tencent_5AAA3EEAB42095C9B7740BE62FBF9A67E007@xxxxxx
---
kernel/time/tick-sched.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 5225467..8905505 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -1030,7 +1030,7 @@ static bool report_idle_softirq(void)
return false;
}
- if (ratelimit < 10)
+ if (ratelimit >= 10)
return false;
/* On RT, softirqs handling may be waiting on some lock */
|