From 5f2909c6cd13564a07ae692a95457f52295c4f22 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sat, 8 Mar 2025 17:48:17 +0100 Subject: [PATCH] posix-timers: Add cond_resched() to posix_timer_add() search loop 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 Signed-off-by: Thomas Gleixner Reviewed-by: Frederic Weisbecker Link: https://lore.kernel.org/all/20250214135911.2037402-2-edumazet@google.com Link: https://lore.kernel.org/all/20250308155623.635612865@linutronix.de --- 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 24d7eab1048b8..de252534215c7 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -144,6 +144,7 @@ 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