linux-kernel - Re: kvm guests crash when running "perf kvm top"

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Message-ID: <1fd8dd31-faf4-4657-ab06-ccba3e790d01@linux.intel.com>
Date: Fri, 25 Apr 2025 08:17:34 +0800
From: "Mi, Dapeng" <dapeng1.mi@...ux.intel.com>
To: Sean Christopherson <seanjc@...gle.com>
Cc: Seth Forshee <sforshee@...nel.org>, Peter Zijlstra
 <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>,
 Namhyung Kim <namhyung@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 Paolo Bonzini <pbonzini@...hat.com>, x86@...nel.org,
 linux-perf-users@...r.kernel.org, kvm@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: kvm guests crash when running "perf kvm top"


On 4/24/2025 9:13 PM, Sean Christopherson wrote:
> On Thu, Apr 24, 2025, Dapeng Mi wrote:
>> Is the command "perf kvm top" executed in host or guest when you see guest
>> crash? Is it easy to be reproduced? Could you please provide the detailed
>> steps to reproduce the issue with 6.15-rc1 kernel?
> Host.  I already have a fix, I'll get it posted today.
>
> https://lore.kernel.org/all/Z_aovIbwdKIIBMuq@google.com

Thumbs up! Glad to see it has been root caused. Thanks.