From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ee0-f47.google.com (mail-ee0-f47.google.com [74.125.83.47]) by kanga.kvack.org (Postfix) with ESMTP id AAA0D6B0035 for ; Tue, 4 Mar 2014 16:32:36 -0500 (EST) Received: by mail-ee0-f47.google.com with SMTP id b15so47835eek.6 for ; Tue, 04 Mar 2014 13:32:36 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTP id g5si321553eew.105.2014.03.04.13.32.33 for ; Tue, 04 Mar 2014 13:32:34 -0800 (PST) Date: Tue, 04 Mar 2014 16:32:23 -0500 From: Naoya Horiguchi Message-ID: <53164672.05300f0a.3ff5.ffff9885SMTPIN_ADDED_BROKEN@mx.google.com> In-Reply-To: <5314F661.30202@oracle.com> References: <53126861.7040107@oracle.com> <1393822946-26871-1-git-send-email-n-horiguchi@ah.jp.nec.com> <5314E0CD.6070308@oracle.com> <5314F661.30202@oracle.com> Subject: Re: [PATCH] mm: add pte_present() check on existing hugetlb_entry callbacks Mime-Version: 1.0 Content-Type: text/plain; charset=iso-2022-jp Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linux-mm@kvack.org List-ID: To: sasha.levin@oracle.com Cc: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, riel@redhat.com # sorry if duplicate message On Mon, Mar 03, 2014 at 04:38:41PM -0500, Sasha Levin wrote: > On 03/03/2014 03:06 PM, Sasha Levin wrote: > >On 03/03/2014 12:02 AM, Naoya Horiguchi wrote: > >>Hi Sasha, > >> > >>>>I can confirm that with this patch the lockdep issue is gone. However, the NULL deref in > >>>>walk_pte_range() and the BUG at mm/hugemem.c:3580 still appear. > >>I spotted the cause of this problem. > >>Could you try testing if this patch fixes it? > > > >I'm seeing a different failure with this patch: > > And the NULL deref still happens. I don't yet find out the root reason why this issue remains. So I tried to run trinity myself but the problem didn't reproduce. (I did simply like "./trinity --group vm --dangerous" a few hours.) Could you show more detail or tips about how the problem occurs? Thanks, Naoya -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org