linux-kernel - Re: regression - 2.6.36 -> 2.6.37 - kvm

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Message-ID: <4D6BA85B.7080908@redhat.com>
Date:	Mon, 28 Feb 2011 08:51:23 -0500
From:	Zachary Amsden <zamsden@...hat.com>
To:	Nikola Ciprich <extmaillist@...uxbox.cz>
CC:	Avi Kivity <avi@...hat.com>,
	Nikola Ciprich <nikola.ciprich@...uxbox.cz>,
	KVM list <kvm@...r.kernel.org>,
	Linux kernel list <linux-kernel@...r.kernel.org>
Subject: Re: regression - 2.6.36 -> 2.6.37 - kvm - 32bit SMP guests don't
 boot

On 02/27/2011 12:20 PM, Nikola Ciprich wrote:
>> I was not aware of the thread.  Please cc me directly, or add a keyword
>> I track - timekeeping, TSC..
>>      
> Hello Zachary, thanks for Your time looking at this!
>    
>> That change alone may not bisect well; without further fixes on top of
>> it, you may end up with a hang or stall, which is likely to manifest in
>> a vendor-specific way.
>>      
> I'm not sure I really understand You here, but this change is exactly to
> what I got while bisecting. With later revisions, including this one,
> 32bit SMP guests don't boot, before it, they do..
>    

Does the bug you are hitting manifest on both Intel and AMD platforms?

Further, do the systems you are hitting this on have stable or unstable 
TSCs?

Thanks,

Zach
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