Commit 5f2909c6 authored by Eric Dumazet's avatar Eric Dumazet Committed by Thomas Gleixner
Browse files

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: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarFrederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/all/20250214135911.2037402-2-edumazet@google.com
Link: https://lore.kernel.org/all/20250308155623.635612865@linutronix.de
parent 45ece993

kernel/time/posix-timers.c

+1 −0
Original line number Diff line number Diff line
@@ -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;