From: Andi Kleen <ak@linux.intel.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Guenter Roeck <linux@roeck-us.net>,
linux-kernel@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Dave Hansen <dave.hansen@intel.com>,
David Woodhouse <dwmw@amazon.co.uk>,
x86@kernel.org, dvyukov@google.com, hughd@google.com,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrea Arcangeli <aarcange@redhat.com>
Subject: Re: Crash in MM code in v4.4.y, v4.9.y with TRANSPARENT_HUGEPAGE enabled
Date: Mon, 20 Aug 2018 13:18:43 -0700 [thread overview]
Message-ID: <20180820201843.GA15008@tassilo.jf.intel.com> (raw)
In-Reply-To: <20180820180353.GO12066@tassilo.jf.intel.com>
On Mon, Aug 20, 2018 at 11:03:53AM -0700, Andi Kleen wrote:
> On Mon, Aug 20, 2018 at 06:29:38PM +0200, Michal Hocko wrote:
> > On Fri 17-08-18 15:27:33, 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.
> >
> > Could you try to apply fd7e315988b7 ("x86/mm: Simplify p[g4um]d_page()
> > macros"). I do not see it in stable 4.4 tree and it has been introduced
> > much later in 4.14. This one gave us quite some headache because it is
> > soooo easy to overlook.
>
> Good catch!
>
> I tested that with 4.9 and backporting the patch indeed fixes the
> syzcaller test case running in a KVM VM. Backported patch appended.
Tested on 4.4 too and it fixes the syzkaller test case there too.
-Andi
next prev parent reply other threads:[~2018-08-20 20:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-17 22:27 Crash in MM code in v4.4.y, v4.9.y with TRANSPARENT_HUGEPAGE enabled Guenter Roeck
2018-08-17 22:39 ` Crash in MM code in v4.4.y, v4.9.y with TRANSPARENT_HUGEPAGE enabledg Andi Kleen
2018-08-17 22:47 ` Guenter Roeck
2018-08-18 0:25 ` Crash in MM code in v4.4.y, v4.9.y with TRANSPARENT_HUGEPAGE enabled Linus Torvalds
2018-08-18 0:44 ` Guenter Roeck
2018-08-18 2:46 ` Andi Kleen
2018-08-20 16:29 ` Michal Hocko
2018-08-20 18:03 ` Andi Kleen
2018-08-20 19:12 ` Michal Hocko
2018-08-20 20:18 ` Andi Kleen [this message]
2018-08-21 13:58 ` Guenter Roeck
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180820201843.GA15008@tassilo.jf.intel.com \
--to=ak@linux.intel.com \
--cc=aarcange@redhat.com \
--cc=dave.hansen@intel.com \
--cc=dvyukov@google.com \
--cc=dwmw@amazon.co.uk \
--cc=gregkh@linuxfoundation.org \
--cc=hughd@google.com \
--cc=jpoimboe@redhat.com \
--cc=kirill.shutemov@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@roeck-us.net \
--cc=mhocko@kernel.org \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).