linux-kernel - Re: [PATCH] kexec: change locking mechanism to a mutex

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Message-Id: <20230921172243.d86a649d7afc835ff2caac26@linux-foundation.org>
Date:   Thu, 21 Sep 2023 17:22:43 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Eric DeVolder <eric.devolder@...cle.com>
Cc:     linux-kernel@...r.kernel.org, bhe@...hat.com, vgoyal@...hat.com,
        dyoung@...hat.com, ebiederm@...ssion.com,
        kexec@...ts.infradead.org, sourabhjain@...ux.ibm.com,
        konrad.wilk@...cle.com, boris.ostrovsky@...cle.com
Subject: Re: [PATCH] kexec: change locking mechanism to a mutex

On Thu, 21 Sep 2023 17:59:38 -0400 Eric DeVolder <eric.devolder@...cle.com> wrote:

> Scaled up testing has revealed that the kexec_trylock()
> implementation leads to failures within the crash hotplug
> infrastructure due to the inability to acquire the lock,
> specifically the message:
> 
> ...
>
> Convert the atomic lock to a mutex.
> 

Do you think this problem is serious enough to warrant a backport into
-stable kernels?