Re: [PATCH v4 10/10] x86/xsaves: Re-enable XSAVES

[Yu-cheng Yu]

On Fri, Apr 29, 2016 at 01:32:15PM -0700, Dave Hansen wrote:
> The reason I haven't acked this patch is that I want to be _sure_ that
> we've audited all of the call paths that access the XSAVE buffer to
> ensure that they can all either handle the XSAVES format *or* don't care
> for whatever reason.
> 
> Could you share the steps that you've taken to assure yourself that all
> of the call paths are handled and we don't have more bugs?
> 

We tested for signal, ptrace, context switch, avx, and mpx.  We also run
these tests with your audit patch to detect any format mis-match.
That said, I cannot be sure there are no more bugs.  As you said, we want
to get this feature tested in the field and find potential issues early.