linux-kernel - Re: [BUG REPORT] x86/apic: CPU Hang in x86 VM During Kdump

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Message-ID: <87a54mkccu.ffs@tglx>
Date: Tue, 29 Jul 2025 21:48:01 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: Yipeng Zou <zouyipeng@...wei.com>, mingo@...hat.com, bp@...en8.de,
 dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
 peterz@...radead.org, sohil.mehta@...el.com, rui.zhang@...el.com,
 arnd@...db.de, yuntao.wang@...ux.dev, linux-kernel@...r.kernel.org
Subject: Re: [BUG REPORT] x86/apic: CPU Hang in x86 VM During Kdump

On Tue, Jul 29 2025 at 21:35, Yipeng Zou wrote:
> 在 2025/7/29 16:53, Thomas Gleixner 写道:
>> On Sun, Jul 27 2025 at 22:01, Thomas Gleixner wrote:
>> So the patch I gave you should handle the reboot vector pending in IRR
>> gracefully. Can you please give it a try?
>
> Hi Thomas:
>
>      Thanks for your time!
>
>      Indeed, It invokes kdump_nmi_shootdown_cpus() and uses the NMI 
> shutdown.
>
>      I started the test run today, but this is a low-probability to hit 
> this path, might take a while.

It's trivial enough to enforce that, no?