Re: [Xen-devel] [PATCH for-4.13] x86/crash: force unlock console before printing on kexec crash

[Jan Beulich <jbeulich@xxxxxxxx>]

On 01.10.2019 21:15, Igor Druzhinin wrote:
> There is a small window where shootdown NMI might come to a CPU
> (e.g. in serial interrupt handler) where console lock is taken. In order
> not to leave following console prints waiting infinitely for shot down
> CPUs to free the lock - force unlock the console.
> 
> The race has been frequently observed while crashing nested Xen in
> an HVM domain.
> 
> Signed-off-by: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>

This should have been Cc-ed to Jürgen (now done), for him to release-ack
it.

Jan

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