linux-kernel - Re: [PATCH AUTOSEL for 4.9 04/52] x86/selftests: Add clobbers for int80 on x86

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Date:   Thu, 30 Nov 2017 21:34:37 +0000
From:   alexander.levin@...izon.com
To:     Dmitry Safonov <0x7f454c46@...il.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Dmitry Safonov <dsafonov@...tuozzo.com>,
        Borislav Petkov <bp@...en8.de>, Borislav Petkov <bp@...e.de>,
        Brian Gerst <brgerst@...il.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "Peter Zijlstra" <peterz@...radead.org>,
        Shuah Khan <shuah@...nel.org>,
        "Thomas Gleixner" <tglx@...utronix.de>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH AUTOSEL for 4.9 04/52] x86/selftests: Add clobbers for
 int80 on x86_64

On Wed, Nov 29, 2017 at 05:42:25PM +0000, Dmitry Safonov wrote:
>Hi Sasha,
>
>I would object including this to stable tree:
>1. It's selftest fixup
>2. I have never saw selftests failing because of it (but it's possible)
>    I saw this in CRIU (Checkpoint Restore In Userspace) project
>    triggering, so I've fixed the selftests, mostly for documentation
>    reasons - as people in userspace can reuse this code and think
>    it's good and will just work after copy-paste (which is not the case).
>
>So, this patch doesn't look urgent to include it in -stable kernel.

Hey Dmitry,

We try to backport selftest patches as stable material to allow a
"complete" selftest to run on stable kernels.

-- 

Thanks,
Sasha