[Hardy, Intrepid] SRU: Under long-running load test, KVM guest freeze and host oops]

[Stefan Bader]

-------- Original Message --------
Subject: Re: [Hardy, Intrepid] SRU: Under long-running load test, KVM guest 
freeze and host oops
Date: Fri, 27 Feb 2009 08:07:26 +0000
From: Colin Ian King <colin.king at canonical.com>
To: Stefan Bader <stefan.bader at canonical.com>
References: <49A6F898.5080009 at canonical.com>

On Thu, 2009-02-26 at 21:16 +0100, Stefan Bader wrote:
> https://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/335097
> 
> [Jaunty contains the fix.]
> 
> SRU justification:
> 
> Impact: The function kvm_mmu_remove_write_access() runs under the slots_lock 
> protection but the list it walks can be modified by other codepaths using the 
> mmu_lock. This causes the host to Oops and the guests will hang.
> 
> Fix: Patch backported from upstream to add mmu_lock protection around the list 
> walk.
> 
> Testcase: Running the validation suite for a longer period of time (24hrs).
> 
ACK
-- 
Colin King   <colin.king at canonical.com>
"Me transmitte sursum, caledoni"


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