On Mon, 9 Dec 2019 11:59:47 +0100
Greg Kurz <groug@kaod.org> wrote:

> On Mon, 9 Dec 2019 12:14:28 +1100
> David Gibson <david@gibson.dropbear.id.au> wrote:
> 
> > On Wed, Dec 04, 2019 at 08:43:31PM +0100, Greg Kurz wrote:  
> > > Guest hangs have been observed recently on POWER9 hosts, specifically LC92x
> > > "Boston" systems, when the guests are being rebooted multiple times. The
> > > issue isn't POWER9 specific though. It is caused by a very long standing bug
> > > when using the uncommon accel=kvm,kernel-irqchip=off machine configuration
> > > which happens to be enforced on LC92x because of a host FW limitation. This
> > > affects both the XICS and XIVE emulated interrupt controllers.
> > > 
> > > The actual fix is in patch 1. Patch 2 is a followup cleanup. The other
> > > patches are unrelated cleanups I came up with while investigating.
> > > 
> > > Since this bug always existed and we're already in rc4, I think it is better
> > > to fix it in 5.0 and possibly backport it to stable and downstream if needed.  
> > 
> > Applied to ppc-for-5.0.
> > 
> >   
> 
> According to Cornelia's comments, it seems I need to respin this against
> the s390-next branch to avoid conflicts.


Aren't these ppc-only patches, though? Confused.