[PATCH v3] Crash: add lock to serialize crash hotplug handling

[Eric DeVolder]

On 9/26/23 15:50, Andrew Morton wrote:
> On Tue, 26 Sep 2023 20:09:05 +0800 Baoquan He <bhe at redhat.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.

Andrew,
Correct, this is sufficiently likely to happen.
Thanks,
eric