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.
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