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author | Wen Yang <wenyang.linux@foxmail.com> | 2023-05-05 00:12:53 +0800 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-19 16:20:59 +0200 |
commit | 77cc52f1b8d76c995648cb4286e57142cac8ce0a (patch) | |
tree | b43909cec98d9917deb178d5a9a4f30269b8d465 /kernel | |
parent | e7aff15ba29ba4b3052786b1636fa5c4aa39e179 (diff) | |
download | linux-77cc52f1b8d76c995648cb4286e57142cac8ce0a.tar.gz |
tick/rcu: Fix bogus ratelimit condition
[ Upstream commit a7e282c77785c7eabf98836431b1f029481085ad ] 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@foxmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/tencent_5AAA3EEAB42095C9B7740BE62FBF9A67E007@qq.com Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/time/tick-sched.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index d6fb6a676bbb..1ad89eec2a55 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -1046,7 +1046,7 @@ 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 */ |