Re: [Xen-devel] [PATCH] xen/arm: route irqs to cpu0

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Wed, 19 Feb 2014, George Dunlap wrote:
> On 02/19/2014 01:53 PM, Ian Campbell wrote:
> > On Wed, 2014-02-19 at 13:43 +0000, Julien Grall wrote:
> > > Hi all,
> > > 
> > > Ping?
> > No one made a case for a release exception so I put it in my 4.5 pile.
> > 
> > >   It would be nice to have this patch for Xen 4.4 as IPI priority
> > > patch won't be pushed before the release.
> > > 
> > > The patch is a minor change and won't impact normal use. When dom0 is
> > > built, Xen always do it on CPU 0.
> > Right, so whoever is doing otherwise already has a big pile of patches I
> > presume?
> > 
> > It's rather late to be making such changes IMHO, but I'll defer to
> > George.
> 
> I can't figure out from the description what's the advantage of having it in
> 4.4.

People that use the default configuration won't see any differences but
people that manually modify Xen to start a second domain and assign a
device to it would.
To give you a concrete example, it fixes a deadlock reported by
Oleksandr Tyshchenko:

http://marc.info/?l=xen-devel&m=139099606402232

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