linux-kernel - Re: [patch V2 02/17] posix-timers: Add cond_resched() to posix_timer

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Message-ID: <Z8i6DafohTLE_Zoj@pavilion.home>
Date: Wed, 5 Mar 2025 21:54:37 +0100
From: Frederic Weisbecker <frederic@...nel.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>,
	Anna-Maria Behnsen <anna-maria@...utronix.de>,
	Benjamin Segall <bsegall@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Andrey Vagin <avagin@...nvz.org>,
	Pavel Tikhomirov <ptikhomirov@...tuozzo.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [patch V2 02/17] posix-timers: Add cond_resched() to
 posix_timer_add() search loop

Le Sun, Mar 02, 2025 at 08:36:46PM +0100, Thomas Gleixner a écrit :
> From: Eric Dumazet <edumazet@...gle.com>
> 
> 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>
> Link: https://lore.kernel.org/all/20250214135911.2037402-2-edumazet@google.com

Reviewed-by: Frederic Weisbecker <frederic@...nel.org>