The following commit has been merged into the timers/core branch of tip: Commit-ID: 5f2909c6cd13564a07ae692a95457f52295c4f22 Gitweb: https://git.kernel.org/tip/5f2909c6cd13564a07ae692a95457f52295c4f22 Author: Eric Dumazet <edumazet@xxxxxxxxxx> AuthorDate: Sat, 08 Mar 2025 17:48:17 +01:00 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitterDate: Thu, 13 Mar 2025 12:07:16 +01:00 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 <edumazet@xxxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Reviewed-by: Frederic Weisbecker <frederic@xxxxxxxxxx> Link: https://lore.kernel.org/all/20250214135911.2037402-2-edumazet@xxxxxxxxxx Link: https://lore.kernel.org/all/20250308155623.635612865@xxxxxxxxxxxxx --- 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 24d7eab..de25253 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;
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