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Re: [Xen-devel] [RFC] [PATCH] xen/blkback: add locking in statistics sysfs show functions

On Thu, Apr 26, 2012 at 07:24:56PM -0700, Konrad Rzeszutek Wilk wrote:
> On Fri, Apr 20, 2012 at 07:21:13PM +0000, Matt Wilson wrote:
> > This is a port of a patch in the XenoLinux 2.6.18 tree:
> > http://xenbits.xen.org/hg/linux-2.6.18-xen.hg/rev/f47c07325a56
> > 
> > Fix blkback sysfs race
> So with this patch I keep on getting this:
> [  128.274290] switch: port 2(vif1.0) entered disabled state
> [  128.859542] BUG: scheduling while atomic: xenwatch/46/0x00000002
> whenever a guest is powered off.

Oops. I hadn't had a chance to do testing of the patch, I just noticed
that the upstream version didn't have it.

I'll tweak it a bit, do some testing, and resubmit when it works.

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