[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] xenstored crashes with SIGSEGV
On Thu, 2014-12-18 at 10:49 +0000, Jan Beulich wrote: > >>> On 18.12.14 at 11:17, <Ian.Campbell@xxxxxxxxxx> wrote: > > On Tue, 2014-12-16 at 16:13 +0000, Frediano Ziglio wrote: > >> Do we have a bug in Xen that affect SSE instructions (possibly already > >> fixed after Philipp version) ? > > > > I've had a niggling feeling of Deja Vu over this which I'd been putting > > down to an old Xen on ARM bug in the area of FPU register switching. > > > > But it seems at some point (possibly even still) there was a similar > > issue with pvops kernels on x86, see: > > http://bugs.xenproject.org/xen/bug/40 > > > > Philipp, what kernel are you guys using? > > > > CCing Jan and the x86 kernel guys (and George since he registered the > > bug). I'm not seeing anything in the kernel logs which looks like a fix > > (there's some PVH related cr0 frobbing, but I don't think that's it). > > I just went through the thread again and didn't find where kernel/ > hypervisor logs were posted. I don't think they were yet -- until recently it seemed like a xenstored bug. Philipp, can you post them now? Also the patch linked to by David seems like a good thing to try if you are indeed running a kernel which is susceptible to this issue. > You mentioning PVH made me want to take a look - said FPU related bug > would be exposed only by PV kernels. It's (almost certainly) not a PVH issue, I was saying that the patch which touched PVH probably isn't relevant to this particular issue. Ian. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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