From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qc0-f169.google.com (mail-qc0-f169.google.com [209.85.216.169]) by kanga.kvack.org (Postfix) with ESMTP id E53DE6B0037 for ; Mon, 3 Mar 2014 16:38:50 -0500 (EST) Received: by mail-qc0-f169.google.com with SMTP id i17so1539088qcy.0 for ; Mon, 03 Mar 2014 13:38:50 -0800 (PST) Received: from userp1040.oracle.com (userp1040.oracle.com. [156.151.31.81]) by mx.google.com with ESMTPS id b7si6735834qad.142.2014.03.03.13.38.50 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 03 Mar 2014 13:38:50 -0800 (PST) Message-ID: <5314F661.30202@oracle.com> Date: Mon, 03 Mar 2014 16:38:41 -0500 From: Sasha Levin MIME-Version: 1.0 Subject: Re: [PATCH] mm: add pte_present() check on existing hugetlb_entry callbacks References: <53126861.7040107@oracle.com> <1393822946-26871-1-git-send-email-n-horiguchi@ah.jp.nec.com> <5314E0CD.6070308@oracle.com> In-Reply-To: <5314E0CD.6070308@oracle.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Naoya Horiguchi , Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Rik van Riel 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. Thanks, Sasha -- 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