Re: [Xen-devel] XSAVE/XRSTOR crash resurgence in 4.3

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 04.07.13 at 20:19, Mark Roddy <mark.roddy@xxxxxxxxxx> wrote:
> -----Original Message-----
> From: Ben Guthro [mailto:ben.guthro@xxxxxxxxx] 
> 
> Happy to test a debug patch, as well.

Here you go. The logging is done using thresholds (so you wouldn't
get your log flooded), but of course this has the risk of not seeing
anything useful in case the problem happens not on every run
through these functions. Also the patch instruments on the xsave/
xrstor paths, not the fxsave/fxrstor ones, so is assumed to be used
on an xsave-capable and -enabled system. Ideally - if reproducible
this way - you'd use a single-vCPU guest (easing later log analysis).

Jan

Attachment: x86-FPU-selector-loss.patch
Description: Text document

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