linux-kernel - Re: percpu crash on NetBurst

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Message-ID: <4E7A0784.1040602@redhat.com>
Date:	Wed, 21 Sep 2011 18:49:24 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Tejun Heo <tj@...nel.org>
CC:	linux-kernel <linux-kernel@...r.kernel.org>,
	KVM list <kvm@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: percpu crash on NetBurst

On 09/21/2011 05:28 PM, Avi Kivity wrote:
>
> Coming back to this, the trigger if cpuid family=6 and model>=13 
> (model 12 works).  Looks like the code disables rep_good is some MSR 
> doesn't have the expected value.  While we should configure the MSR 
> correctly, it looks like the fallback code for !rep_good is broken.  
> Will look further.
>

Ok, without rep_good, memcpy() sometimes copies backwards.  A stale copy 
of memmove_64.c I had around got picked up instead of memmove_64.S; that 
memmove() used memcpy() in the copy-forward case.

So, nothing to see, sorry about the noise.

-- 
error compiling committee.c: too many arguments to function

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