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 David _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
