Re: [Qemu-devel] [Qemu-ppc] [PATCH] spapr: fix core unplug crash

2016-07-10 Thread David Gibson
On Fri, Jul 08, 2016 at 05:47:01PM +0200, Greg Kurz wrote: > On Fri, 08 Jul 2016 15:12:07 +0200 > Greg Kurz wrote: > > > If the host has 8 threads/core and the guest is started with: > > > > -smp cores=1,threads=4,maxcpus=12 > > > > It is possible to crash QEMU by doing: > > > > (qemu) device_

Re: [Qemu-devel] [Qemu-ppc] [PATCH] spapr: fix core unplug crash

2016-07-10 Thread Bharata B Rao
On Fri, Jul 08, 2016 at 05:47:01PM +0200, Greg Kurz wrote: > On Fri, 08 Jul 2016 15:12:07 +0200 > Greg Kurz wrote: > > > If the host has 8 threads/core and the guest is started with: > > > > -smp cores=1,threads=4,maxcpus=12 > > > > It is possible to crash QEMU by doing: > > > > (qemu) device_

Re: [Qemu-devel] [Qemu-ppc] [PATCH] spapr: fix core unplug crash

2016-07-08 Thread Greg Kurz
On Fri, 08 Jul 2016 15:12:07 +0200 Greg Kurz wrote: > If the host has 8 threads/core and the guest is started with: > > -smp cores=1,threads=4,maxcpus=12 > > It is possible to crash QEMU by doing: > > (qemu) device_add host-spapr-cpu-core,core-id=16,id=foo > (qemu) device_del foo > Segmentatio