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Re: [Xen-devel] status of PV drivers in Xen 4.0

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] status of PV drivers in Xen 4.0
From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date: Tue, 20 Apr 2010 18:07:52 +0100
Cc: Guillaume Rousse <Guillaume.Rousse@xxxxxxxx>, Andrew Lyon <andrew.lyon@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
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On Tue, 20 Apr 2010, Pasi Kärkkäinen wrote:
> On Tue, Apr 20, 2010 at 05:52:58PM +0100, Stefano Stabellini wrote:
> > On Tue, 20 Apr 2010, Pasi Kärkkäinen wrote:
> > > Getting pvops-based pv-on-hvm drivers to upstream Linux is the ultimate 
> > > goal of course :)
> > > 
> > 
> > I temporarily had to slow down my work on that because of other deadlines
> > I had in the last months, but soon I should be able to resume my work
> > full time.
> > I am currently trying to fix a save\restore bug that prevents pv
> > drivers or the domain from resuming correctly after a save\restore or a
> > migration.
> > In particular the call to dpm_suspend_start doesn't leave the kernel in
> > a good state in the PV on HVM case and I am not sure why: it seems to hang
> > half way through.
> > I need to call dpm_suspend_start because xenbus_dev_suspend has to be
> > called otherwise the pv drivers don't resume correctly.
> >
> 
> Thanks for the update!
> 
> Hmm.. I guess the code in the old xenlinux based pv-on-hvm drivers is 
> different enough
> so that it cannot be compared? 
> 
 

I am using the code under unmodified_drivers as a reference and that is
quite different.
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