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Re: [Xen-devel] Tagging Xen 4.0.0 first release candidate / pygrub dom0

To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>, "Pasi Kärkkäinen" <pasik@xxxxxx>
Subject: Re: [Xen-devel] Tagging Xen 4.0.0 first release candidate / pygrub dom0 caching bug
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Thu, 21 Jan 2010 15:39:33 +0000
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>>> Pasi Kärkkäinen<pasik@xxxxxx> 21.01.10 13:28 >>>
>On Wed, Jan 06, 2010 at 03:50:05PM +0200, Pasi Kärkkäinen wrote:
>> pygrub doesn't use O_DIRECT so sometimes it gets old information
>> from dom0 kernel cache - and fails to use the updated domU grub.conf.
>> 
>> Redhat seems to have patches available for testing.. not for
>> xen-unstable though.
>> 
>> I've personally hit this bug many times.
>> 
>
>It seems Redhat guys have a fix available.. they fixed the problem by 
>patching dom0 kernel blkback.
>
>More details about the fix here:
>https://bugzilla.redhat.com/show_bug.cgi?id=466681 
>
>Should this be applied to 2.6.18-xen and pv_ops dom0 kernels aswell? 

Yes, please.

Jan

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