linux-kernel - Re: [PATCH] x86/entry/64: Fix native_load_gs_index() SWAPGS handling with IRQ state tracing enabled

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Message-ID: <CALCETrXaCtrzu7xyR+wHvSQhMoP4onUg0hfHHoxd72QSCqgkmw@mail.gmail.com>
Date:   Wed, 29 Nov 2017 10:12:02 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH] x86/entry/64: Fix native_load_gs_index() SWAPGS handling
 with IRQ state tracing enabled

On Wed, Nov 29, 2017 at 9:57 AM, Andy Lutomirski <luto@...nel.org> wrote:
> On Tue, Nov 28, 2017 at 11:09 PM, Ingo Molnar <mingo@...nel.org> wrote:
>>
>> * Jarkko Nikula <jarkko.nikula@...ux.intel.com> wrote:
>>
>>> Hi
>>>
>>> Suspend-to-ram and resume stopped working on v4.15-rc1 and I bisected it to
>>> commit ca37e57bbe0c ("x86/entry/64: Add missing irqflags tracing to
>>> native_load_gs_index()").
>>>

Jarkko, can you try the attached patch?  If it survives resume, can
you see if the log contains anything interesting?

View attachment "gsindex.patch" of type "text/x-patch" (840 bytes)