linux-kernel - Re: [PATCH v3] Crash: add lock to serialize crash hotplug handling

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Message-Id: <20230926135001.4eb6ca73b1a4aa6224355ad1@linux-foundation.org>
Date:   Tue, 26 Sep 2023 13:50:01 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Baoquan He <bhe@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kexec@...ts.infradead.org,
        eric.devolder@...cle.com, vschneid@...hat.com,
        sourabhjain@...ux.ibm.com
Subject: Re: [PATCH v3] Crash: add lock to serialize crash hotplug handling

On Tue, 26 Sep 2023 20:09:05 +0800 Baoquan He <bhe@...hat.com> wrote:

> Eric reported that handling corresponding crash hotplug event can be
> failed easily when many memory hotplug event are notified in a short
> period. They failed because failing to take __kexec_lock.

I'm assuming that this failure is sufficiently likely so as to  justify a -stable
backport of the fix.   Please let me know if this is incorrect.