On Mon, 9 Dec 2019 12:07:35 +0100 Cornelia Huck <coh...@redhat.com> wrote:
> On Mon, 9 Dec 2019 11:59:47 +0100 > Greg Kurz <gr...@kaod.org> wrote: > > > On Mon, 9 Dec 2019 12:14:28 +1100 > > David Gibson <da...@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. Oops... I've mixed up with the CPUReset series, sorry for the confusion :-)
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