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From: Sasha Levin <sasha.levin@oracle.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>,
	Hugh Dickins <hughd@google.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	David Rientjes <rientjes@google.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	"H. Peter Anvin" <hpa@zytor.com>, Mel Gorman <mgorman@suse.de>,
	Dave Jones <davej@redhat.com>, linux-mm <linux-mm@kvack.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: mm: BUG in do_huge_pmd_wp_page
Date: Mon, 07 Apr 2014 10:56:49 -0400	[thread overview]
Message-ID: <5342BCB1.9010109@oracle.com> (raw)
In-Reply-To: <20140407144835.GA17774@node.dhcp.inet.fi>

On 04/07/2014 10:48 AM, Kirill A. Shutemov wrote:
> On Fri, Apr 04, 2014 at 03:37:20PM -0400, Sasha Levin wrote:
>> > And another ping exactly a year later :)
> I think we could "fix" this false positive with the patch below
> (untested), but it's ugly and doesn't add much value.

I could carry that patch myself and not complain about it
any more if there's no intent to produce a "real" fix, but
I doubt that that's really the path we want to take in the
long run.

We'll end up with a bunch of broken paths when enabling
debug, making any sort of debugging slow and useless, which
isn't a desirable result to say the least.


Thanks,
Sasha

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WARNING: multiple messages have this Message-ID (diff)
From: Sasha Levin <sasha.levin@oracle.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>,
	Hugh Dickins <hughd@google.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	David Rientjes <rientjes@google.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	"H. Peter Anvin" <hpa@zytor.com>, Mel Gorman <mgorman@suse.de>,
	Dave Jones <davej@redhat.com>, linux-mm <linux-mm@kvack.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: mm: BUG in do_huge_pmd_wp_page
Date: Mon, 07 Apr 2014 10:56:49 -0400	[thread overview]
Message-ID: <5342BCB1.9010109@oracle.com> (raw)
In-Reply-To: <20140407144835.GA17774@node.dhcp.inet.fi>

On 04/07/2014 10:48 AM, Kirill A. Shutemov wrote:
> On Fri, Apr 04, 2014 at 03:37:20PM -0400, Sasha Levin wrote:
>> > And another ping exactly a year later :)
> I think we could "fix" this false positive with the patch below
> (untested), but it's ugly and doesn't add much value.

I could carry that patch myself and not complain about it
any more if there's no intent to produce a "real" fix, but
I doubt that that's really the path we want to take in the
long run.

We'll end up with a bunch of broken paths when enabling
debug, making any sort of debugging slow and useless, which
isn't a desirable result to say the least.


Thanks,
Sasha

  reply	other threads:[~2014-04-07 15:08 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-29 13:04 mm: BUG in do_huge_pmd_wp_page Sasha Levin
2013-03-29 13:04 ` Sasha Levin
2013-04-04 14:03 ` Sasha Levin
2013-04-04 14:03   ` Sasha Levin
2013-04-04 14:30   ` Kirill A. Shutemov
2013-04-04 14:30     ` Kirill A. Shutemov
2013-04-04 14:37     ` Sasha Levin
2013-04-04 14:37       ` Sasha Levin
2013-04-04 16:28       ` Kirill A. Shutemov
2013-04-04 16:28         ` Kirill A. Shutemov
2013-04-04 21:54         ` Sasha Levin
2013-04-04 21:54           ` Sasha Levin
2014-04-04 19:37   ` Sasha Levin
2014-04-04 19:37     ` Sasha Levin
2014-04-07 14:48     ` Kirill A. Shutemov
2014-04-07 14:56       ` Sasha Levin [this message]
2014-04-07 14:56         ` Sasha Levin
2014-04-07 19:40       ` Sasha Levin
2014-04-07 19:40         ` Sasha Levin
2014-04-07 20:11         ` Kirill A. Shutemov
2014-05-15 17:31           ` Sasha Levin
2014-05-15 17:31             ` Sasha Levin
2014-05-15 17:37             ` Hugh Dickins
2014-05-15 17:37               ` Hugh Dickins
2014-05-15 17:43               ` Sasha Levin
2014-05-15 17:43                 ` Sasha Levin
2014-05-15 17:58                 ` Hugh Dickins
2014-05-15 17:58                   ` Hugh Dickins
2013-04-10  8:02 ` Minchan Kim
2013-04-10  8:02   ` Minchan Kim
2013-04-11 13:18   ` Kirill A. Shutemov
2013-04-11 13:18     ` Kirill A. Shutemov
2013-04-14  7:13     ` Minchan Kim
2013-04-14  7:13       ` Minchan Kim
2013-04-11 14:55   ` Sasha Levin
2013-04-11 14:55     ` Sasha Levin
2013-04-11 15:13     ` Kirill A. Shutemov
2013-04-11 15:13       ` Kirill A. Shutemov
2013-04-11 15:14       ` Sasha Levin
2013-04-24 22:46         ` Andrew Morton
2013-04-24 22:46           ` Andrew Morton
2013-04-26  0:51           ` Sasha Levin
2013-04-26  0:51             ` Sasha Levin
2013-04-26  2:01             ` Dave Jones
2013-04-26  2:01               ` Dave Jones
2013-04-26  3:12               ` Sasha Levin
2013-04-26  3:12                 ` Sasha Levin
2014-02-04  3:01               ` Sasha Levin
2014-02-04  3:01                 ` Sasha Levin
2014-02-04  3:59                 ` Hugh Dickins
2014-02-04  3:59                   ` Hugh Dickins
2014-02-04 16:58                   ` Kirill A. Shutemov
2014-02-04 16:58                     ` Kirill A. Shutemov
2014-02-05 18:12                   ` Sasha Levin
2014-02-05 18:12                     ` Sasha Levin
2014-02-05 22:50                     ` Hugh Dickins
2014-02-05 22:50                       ` Hugh Dickins
2013-04-24 22:51   ` H. Peter Anvin
2013-04-24 22:51     ` H. Peter Anvin
2013-04-24 23:40     ` Simon Jeons
2013-04-26  2:28       ` H. Peter Anvin
2013-04-26  2:28         ` H. Peter Anvin
2013-04-26  1:30     ` Minchan Kim
2013-04-26  1:30       ` Minchan Kim

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