linux-kernel - Re: KVM guest-kernel panics double fault

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Message-ID: <4F0C3044.7050307@redhat.com>
Date:	Tue, 10 Jan 2012 14:34:12 +0200
From:	Avi Kivity <avi@...hat.com>
To:	stephan.baerwolf@...ilmenau.de
CC:	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: KVM guest-kernel panics double fault

On 01/10/2012 02:17 PM, Stephan Bärwolf wrote:
> Hi, me again.
>
> Thank you for your instructions, I will send the patch right after this
> mail.
>
> On 01/10/12 11:31, Avi Kivity wrote:
> >> I prepare/adapt everything to the mentioned styles/policy.
> >> (I'll insert 2 additional ops for getting "cpuid" and "id of vcpu"...)
> > What do you mean by "id of vcpu"?
> I mean the number of the corresponding vcpu.
> (So mostly "vcpu->vcpu_id" ...)
> It is necessary for "pr_err_ratelimited"-complains, if cpuid-vendor is
> unknown ...
> ("Jan 10 12:14:55 thinkrat kernel: [ 4476.484359] kvm: 15680: cpu0
> unknown vendor - assuming intel")

It isn't worthwhile - just don't print the vcpu number (the task ID
contains enough information, and anyway this should be rare to the point
of never ever happening)

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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