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Message-ID: <2025071032-june-ecosystem-7767@gregkh>
Date: Thu, 10 Jul 2025 15:09:47 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: "Heyne, Maximilian" <mheyne@...zon.de>
Cc: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>,
Oleg Nesterov <oleg@...hat.com>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
Andrew Morton <akpm@...ux-foundation.org>,
"stable@...r.kernel.org" <stable@...r.kernel.org>,
"Sauerwein, David" <dssauerw@...zon.de>,
Sasha Levin <sashal@...nel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>
Subject: Re: [RESEND PATCH 5.15] fs/proc: do_task_stat: use
__for_each_thread()
On Thu, Jul 10, 2025 at 12:43:18PM +0000, Heyne, Maximilian wrote:
> From: Oleg Nesterov <oleg@...hat.com>
>
> [ Upstream commit 7904e53ed5a20fc678c01d5d1b07ec486425bb6a ]
>
> do/while_each_thread should be avoided when possible.
>
> Link: https://lkml.kernel.org/r/20230909164501.GA11581@redhat.com
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>
> Cc: Eric W. Biederman <ebiederm@...ssion.com>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
> Stable-dep-of: 7601df8031fd ("fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats")
> Cc: stable@...r.kernel.org
> [mheyne: adjusted context]
> Signed-off-by: Maximilian Heyne <mheyne@...zon.de>
> ---
>
> Compile-tested only.
> We're seeing soft lock-ups with 5.10.237 because of the backport of
> commit 4fe85bdaabd6 ("fs/proc: do_task_stat: use sig->stats_lock to
> gather the threads/children stats"). I'm assuming this is broken on 5.15
> too.
Same here, how does this change anything?
greg k-h
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