Re: [Xen-devel] xenstored crashes with SIGSEGV

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> 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. You mentioning PVH made me want to
take a look - said FPU related bug would be exposed only by PV
kernels.

Jan


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