Re: [Xen-devel] 4.1.2 very slow without upstream patches, but fast with them, also 4.2 very slow

[M A Young <m.a.young@xxxxxxxxxxxx>]

On Mon, 6 Aug 2012, Konrad Rzeszutek Wilk wrote:
> On Mon, Aug 06, 2012 at 01:41:07PM +0100, Malcolm Crossley wrote:
> > I suspect you may need the following patch to improve your 4.1.2
> > performance:
> >
> > http://xenbits.xen.org/hg/xen-4.1-testing.hg/rev/435493696053
> >
> > The cache flush on every C2 transition is very expensive and causes
> > a large slow down.
> >
> > 4.1.3-rc3 already includes that patch so it would be worth testing
> > that version.
> MA Young, could this be back-ported in the F17 and F16. I belive
> Micahel Petullo setup a bug for that?
I don't recall I seeing a bug for this but the patch is in 
xen-4.1.2-25.fc18 and xen-4.1.2-25.fc17 (which is building now).
        Michael Young

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