linux-kernel - RE: [patch V2 00/20] x86/fpu: Clean up exception fixups and error handling in sigframe related code

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Message-ID: <878s078ap8.ffs@tglx>
Date:   Wed, 08 Sep 2021 15:21:23 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     "Luck, Tony" <tony.luck@...el.com>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     "x86@...nel.org" <x86@...nel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Song Liu <songliubraving@...com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Peter Ziljstra <peterz@...radead.org>
Subject: RE: [patch V2 00/20] x86/fpu: Clean up exception fixups and error
 handling in sigframe related code

On Wed, Sep 08 2021 at 07:14, Thomas Gleixner wrote:
> On Wed, Sep 08 2021 at 04:06, Tony Luck wrote:
>
>>>> Huch? That tree is based on 0bcfe68b876 and it just has those 20 patches
>>>> on top which should not at all interfere with your root filesystem
>>>> device. Let me verify.
>>>
>>> I lost connection to my test machines. Will continue tomorrow morning.
>>
>> To save you some time I ran a bisect. It says the wheels fall off the bus at
>> patch 13/2
>
> Yes, but that's not the real culprit. That's just the messenger.

This patch triggers it because it has the left over #PF check from
V1. But then I removed the MCE safe fixup from the *SAVE functions, got
distracted and tested a stale kernel... I'll send a V3 in a minute

Thanks,

        tglx