From mboxrd@z Thu Jan  1 00:00:00 1970
From: Borislav Petkov <bp@alien8.de>
Subject: Re: Splat during resume
Date: Sat, 25 Mar 2017 22:46:15 +0100
Message-ID: <20170325214615.eqgmkwbkyldt7wwl@pd.tnic>
References: <20170325185855.4itsyevunczus7sc@pd.tnic>
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To: "Rafael J. Wysocki" <rjw@rjwysocki.net>, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: lkml <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org>, Andy Lutomirski <luto@kernel.org>, Arnd Bergmann <arnd@arndb.de>, Brian Gerst <brgerst@gmail.com>, Dave Hansen <dave.hansen@intel.com>, Denys Vlasenko <dvlasenk@redhat.com>, Josh Poimboeuf <jpoimboe@redhat.com>, Linus Torvalds <torvalds@linux-foundation.org>, Michal Hocko <mhocko@suse.com>, Peter Zijlstra <peterz@infradead.org>, linux-arch@vger.kernel.org, linux-mm@kvack.org, x86-ml <x86@kernel.org>
List-Id: linux-mm.kvack.org

On Sat, Mar 25, 2017 at 07:58:55PM +0100, Borislav Petkov wrote:
> Hey Rafael,
> 
> have you seen this already (partial splat photo attached)? Happens
> during resume from s2d. Judging by the timestamps, this looks like the
> resume kernel before we switch to the original, boot one but I could be
> mistaken.
> 
> This is -rc3+tip/master.
> 
> I can't catch a full splat because this is a laptop and it doesn't have
> serial. netconsole is helping me for shit so we'd need some guess work.
> 
> So I'm open to suggestions.
> 
> Please don't say "bisect" yet ;-)))

No need, I found it. Reverting

  ea3b5e60ce80 ("x86/mm/ident_map: Add 5-level paging support")

makes the machine suspend and resume just fine again. Lemme add people to CC.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.