linux-kernel - Re: [patch V2 10/17] posix-timers: Make signal_struct::next_posix_timer_id an atomic

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Message-ID: <Z8c-vvnMpPjYRvOn@grain>
Date: Tue, 4 Mar 2025 20:56:14 +0300
From: Cyrill Gorcunov <gorcunov@...il.com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>,
	Anna-Maria Behnsen <anna-maria@...utronix.de>,
	Frederic Weisbecker <frederic@...nel.org>,
	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 10/17] posix-timers: Make
 signal_struct::next_posix_timer_id an atomic_t

On Mon, Mar 03, 2025 at 10:24:28PM +0100, Thomas Gleixner wrote:
> 
> Welcome. Some quick validation with CRIU would be appreciated.

Just tested in criu: works without problem, both modes -- with new
prctl and without it. Note that I only have ran separate posix-timers
test case, probably virtuozzo team might do more deep tesing.
---
root@fc:/home/cyrill/criu# test/zdtm.py run -t zdtm/static/posix_timers
userns is supported
The kernel is tainted: '512'
=== Run 1/1 ================ zdtm/static/posix_timers
====================== Run zdtm/static/posix_timers in h =======================
Start test
./posix_timers --pidfile=posix_timers.pid --outfile=posix_timers.out
Run criu dump
Run criu restore
Send the 15 signal to  56
Wait for zdtm/static/posix_timers(56) to die for 0.100000
Removing dump/zdtm/static/posix_timers/56
====================== Test zdtm/static/posix_timers PASS ======================