[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20250505225634.2688578-82-sashal@kernel.org>
Date: Mon, 5 May 2025 18:53:02 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Eric Dumazet <edumazet@...gle.com>,
Thomas Gleixner <tglx@...utronix.de>,
Frederic Weisbecker <frederic@...nel.org>,
Sasha Levin <sashal@...nel.org>,
anna-maria@...utronix.de
Subject: [PATCH AUTOSEL 6.6 082/294] posix-timers: Add cond_resched() to posix_timer_add() search loop
From: Eric Dumazet <edumazet@...gle.com>
[ Upstream commit 5f2909c6cd13564a07ae692a95457f52295c4f22 ]
With a large number of POSIX timers the search for a valid ID might cause a
soft lockup on PREEMPT_NONE/VOLUNTARY kernels.
Add cond_resched() to the loop to prevent that.
[ tglx: Split out from Eric's series ]
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Frederic Weisbecker <frederic@...nel.org>
Link: https://lore.kernel.org/all/20250214135911.2037402-2-edumazet@google.com
Link: https://lore.kernel.org/all/20250308155623.635612865@linutronix.de
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
kernel/time/posix-timers.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index b924f0f096fa4..7534069f60333 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -118,6 +118,7 @@ static int posix_timer_add(struct k_itimer *timer)
return id;
}
spin_unlock(&hash_lock);
+ cond_resched();
}
/* POSIX return code when no timer ID could be allocated */
return -EAGAIN;
--
2.39.5
Powered by blists - more mailing lists