Message-ID: <49BC4196.3070204@goop.org>
Date: Sat, 14 Mar 2009 16:45:26 -0700
From: Jeremy Fitzhardinge <jeremy@goop.org>
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To: akataria@vmware.com
CC: Peter Zijlstra <a.p.zijlstra@chello.nl>,
       the arch/x86 maintainers <x86@kernel.org>,
       LKML <linux-kernel@vger.kernel.org>
Subject: Re: VMI broken on tip/master...
References: <1236966968.14680.15.camel@alok-dev1>
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Alok Kataria wrote:
> Hi Peter, 
>
> I was seeing a early fault when running tip/master with VMI enabled on
> VMware platform. 
> This early fault was in the vmi_patch code where we are applying
> paravirt_alternatives. After some trials i noticed that this is
> reproducible only with CONFIG_TRACING. With that disabled my VM boots
> again. 
>
> I started a git bisect after that, and git pointed to this as the bad
> commit
>
> commit 6cc3c6e12bb039047974ad2e7e2d46d15a1b762f
>     trace_clock: fix preemption bug
>
> I then reverted that commit from tip/master and the system did boot. 
> But I fail to understand how this simple patch would be causing things
> to fail in VMI. Any ideas ?
>   

Nope.  My first guess is that this is a misbisection, but the fact that 
reverting helps tends to undermine that diagnosis.

What crash are you seeing?  What kind of fault?  At what instruction?  
Doing what?  It's a bit hard to tell what you're actually seeing.

Does reverting the text_poke() changes make a difference?

    J
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