linux-kernel - Re: Crash in MM code in v4.4.y, v4.9.y with TRANSPARENT

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Message-ID: <20180817223907.GH12066@tassilo.jf.intel.com>
Date:   Fri, 17 Aug 2018 15:39:07 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Dave Hansen <dave.hansen@...el.com>,
        David Woodhouse <dwmw@...zon.co.uk>, x86@...nel.org,
        dvyukov@...gle.com, hughd@...gle.com,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrea Arcangeli <aarcange@...hat.com>
Subject: Re: Crash in MM code in v4.4.y, v4.9.y with TRANSPARENT_HUGEPAGE
 enabledg

On Fri, Aug 17, 2018 at 03:27:33PM -0700, Guenter Roeck wrote:
> Hi,
> 
> the following crash is seen in v4.4.148, v4.4.149, v4.9.120, and v4.9.121
> with CONFIG_TRANSPARENT_HUGEPAGE=y, CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y.

Just to confirm, it's not in mainline right? So only in backports?

There's also a report for 4.17 in

 https://bugzilla.redhat.com/show_bug.cgi?id=1618792

(was trying to reproduce that, but not successfull so far)


-Andi