Re: [PATCH 0/2] x86: NMI vs paravirt fixes

Andy Lutomirski
2015-09-21T19:15:11Z

On Sun, Sep 20, 2015 at 4:32 PM, Andy Lutomirski <luto@kernel.org> wrote:
> These are for x86/urgent.
>
> This fixes at least one problem that Sasha can trigger using some
> crazy configuration + Trinity. I can't reproduce the full file of
> nastiness that he's seeing, but these patches both look legit to me,
> they fix what look like real bugs, and they seem to help Sasha's
> tests.
>
> Patch 1 is ugly. Feel free to tell me to shove the asm into the
> entry asm files, although that will involve duplicating it for
> 32-bit and 64-bit kernels.

It turns out that Sasha had noreplace-paravirt on, which is probably
how he was able to hit these reliably.

They're still bugs, though.

--Andy