[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] xenstored crashes with SIGSEGV
On Thu, Dec 18, 2014 at 10:25:15AM +0000, David Vrabel wrote: > On 18/12/14 10:17, Ian Campbell 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 also can't quite shake the feeling that there was another much older > > issue relating to FPU context switch on x86, but I think that was truly > > ancient history (2.6.18 era stuff) > > http://marc.info/?l=linux-kernel&m=139132566024357 More up-to-date: http://lkml.iu.edu/hypermail/linux/kernel/1409.0/01057.html And boy did that mess up Oracle DB! There had been an P0 bug affecting databases and this patch solved it. > > David _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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