linux-kernel - Re: Splat during resume

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Message-ID: <20170325220103.owhygrrrlsnk55fj@node.shutemov.name>
Date:   Sun, 26 Mar 2017 01:01:03 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Borislav Petkov <bp@...en8.de>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Brian Gerst <brgerst@...il.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-arch@...r.kernel.org, linux-mm@...ck.org,
        x86-ml <x86@...nel.org>
Subject: Re: Splat during resume

On Sat, Mar 25, 2017 at 10:50:12PM +0100, Borislav Petkov wrote:
> > 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.
> 
> So I see rIP pointing to ident_pmd_init() and the stack trace has
> load_image_and_restore() so if I try to connect the dots, I get:
> 
> load_image_and_restore
> |-> hibernation_restore
>  |-> resume_target_kernel
>   |-> swsusp_arch_resume
>    |-> set_up_temporary_mappings
>     |-> kernel_ident_mapping_init
>      |-> ... ident_pmd_init
> 
> I'll let you folks make sense of what's going on.

Sorry for this. See

http://lkml.kernel.org/r/20170324120458.nw3fwpmdptjtj5qb@node.shutemov.name

-- 
 Kirill A. Shutemov