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Bug#604096: Bug#602418: #601341, #602418 and #604096 seem to be duplicates



On Mon, 2010-11-29 at 02:52 +0000, Ben Hutchings wrote: 
> On Sun, 2010-11-28 at 18:12 +0000, Ian Campbell wrote:
> > On Sun, 2010-11-28 at 16:58 +0000, Ben Hutchings wrote: 
> > > On Tue, 2010-11-23 at 12:56 +0100, Lionel Elie Mamane wrote:
> > > > On Tue, Nov 23, 2010 at 10:41:57AM +0100, Alexander Kurtz wrote:
> > > > 
> > > > > The following bugs seem to be identical:
> > > > 
> > > > > #601341
> > > > > #602418
> > > > > #604096
> > > > 
> > > > > They all seem to be fixed by this kernel:
> > > > > http://xenbits.xen.org/people/ianc/
> > > > 
> > > > > I think it would be a good idea to
> > > > >  *) merge them all
> > > > >  *) assign to linux-2.6
> > > > >  *) mark as affecting xserver-xorg
> > > > >  *) mark as patched
> > > > >  *) possibly mark them as RC
> > > > 
> > > > That's all fine by me (as reporter of #601341 and #602418).
> > > > 
> > > > Possibly the patch tag is not adequate as the exact
> > > > read-to-apply-to-the-Debian-package patch is not there, just "one of
> > > > the differences between the Debian package and
> > > > http://xenbits.xen.org/people/ianc/ fixes this".
> > > 
> > > Ian, can you identify which patch we're currently missing?
> > 
> > They are the changes attached to "Reinstating GPU fixes to Xen flavour"
> > on debian-kernel (<1290518224.5514.27.camel@zakaz.uk.xensource.com>)
> > last week.
> [...]
> > IIRC the original discussion regarding the omission of these changes
> > from the last Xen pvops merge starts at
> > <20100817192832.GA22360@wavehammer.waldi.eu.org> (on debian-kernel back
> > in August).
> 
> Thanks for the pointers.
> 
> I agree with Bastian that some of these changes are really quite nasty.
> Do you and other Xen developers have any plan for how to fix the GART
> and TTM mapping problems in a cleaner way as Xen dom0 support goes
> upstream?

I know that there is a plan to get rid of the _PAGE_IOMAP stuff
altogether by simply arranging for a 1-1 mapping for the relevant device
PFNs in the P2M array. However I'm not sure whether or not this
knocks-on into a fix for the GART/TTM stuff.

Konrad, do you have an idea how you plan to solve the GART/TTM issues
upstream?

> If there is no such plan then I would rather disable these drivers than
> make them work temporarily with a hack.

Thanks,
Ian.

-- 
Ian Campbell

You will not be elected to public office this year.

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