From: Hans Rosenfeld <hans.rosenfeld@amd.com>
To: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Hugh Dickins <hugh@veritas.com>, Ingo Molnar <mingo@elte.hu>,
Jeff Chua <jeff.chua.linux@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Gabriel C <nix.or.die@googlemail.com>,
Arjan van de Ven <arjan@linux.intel.com>,
Nishanth Aravamudan <nacc@us.ibm.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] x86: fix PAE pmd_bad bootup warning
Date: Thu, 8 May 2008 18:19:25 +0200 [thread overview]
Message-ID: <20080508161925.GH12654@escobedo.amd.com> (raw)
In-Reply-To: <1210261882.7905.49.camel@nimitz.home.sr71.net>
On Thu, May 08, 2008 at 08:51:22AM -0700, Dave Hansen wrote:
> Is there anything in your dmesg?
mm/memory.c:127: bad pmd ffff810076801040(80000000720000e7).
> There was a discussion on LKML in the last couple of days about
> pmd_bad() triggering on huge pages. Perhaps we're clearing the mapping
> with the pmd_none_or_clear_bad(), and *THAT* is leaking the page.
That makes sense. I remember that explicitly munmapping the huge page
would still work, but it doesn't. I don't quite remember what I did back
then to test this, but I probably made some mistake there that led me to
some false conclusions.
--
%SYSTEM-F-ANARCHISM, The operating system has been overthrown
WARNING: multiple messages have this Message-ID (diff)
From: Hans Rosenfeld <hans.rosenfeld@amd.com>
To: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Hugh Dickins <hugh@veritas.com>, Ingo Molnar <mingo@elte.hu>,
Jeff Chua <jeff.chua.linux@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Gabriel C <nix.or.die@googlemail.com>,
Arjan van de Ven <arjan@linux.intel.com>,
Nishanth Aravamudan <nacc@us.ibm.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] x86: fix PAE pmd_bad bootup warning
Date: Thu, 8 May 2008 18:19:25 +0200 [thread overview]
Message-ID: <20080508161925.GH12654@escobedo.amd.com> (raw)
In-Reply-To: <1210261882.7905.49.camel@nimitz.home.sr71.net>
On Thu, May 08, 2008 at 08:51:22AM -0700, Dave Hansen wrote:
> Is there anything in your dmesg?
mm/memory.c:127: bad pmd ffff810076801040(80000000720000e7).
> There was a discussion on LKML in the last couple of days about
> pmd_bad() triggering on huge pages. Perhaps we're clearing the mapping
> with the pmd_none_or_clear_bad(), and *THAT* is leaking the page.
That makes sense. I remember that explicitly munmapping the huge page
would still work, but it doesn't. I don't quite remember what I did back
then to test this, but I probably made some mistake there that led me to
some false conclusions.
--
%SYSTEM-F-ANARCHISM, The operating system has been overthrown
--
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next prev parent reply other threads:[~2008-05-08 16:20 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-06 1:06 Linux 2.6.26-rc1 - pgtable_32.c:178 pmd_bad Jeff Chua
2008-05-06 12:49 ` Ingo Molnar
2008-05-06 13:56 ` Hugh Dickins
2008-05-06 15:04 ` Ingo Molnar
2008-05-06 15:09 ` Linus Torvalds
2008-05-06 15:15 ` Ingo Molnar
2008-05-06 16:16 ` Linus Torvalds
2008-05-06 16:30 ` Ingo Molnar
2008-05-06 15:32 ` Jeremy Fitzhardinge
2008-05-06 16:12 ` Hugh Dickins
2008-05-06 18:39 ` Linus Torvalds
2008-05-06 19:43 ` Hugh Dickins
2008-05-06 19:49 ` [PATCH] x86: fix PAE pmd_bad bootup warning Hugh Dickins
2008-05-06 19:49 ` Hugh Dickins
2008-05-06 20:06 ` Linus Torvalds
2008-05-06 20:06 ` Linus Torvalds
2008-05-06 20:30 ` Hugh Dickins
2008-05-06 20:30 ` Hugh Dickins
2008-05-08 16:07 ` Nishanth Aravamudan
2008-05-08 16:07 ` Nishanth Aravamudan
2008-05-06 20:22 ` Hans Rosenfeld
2008-05-06 20:22 ` Hans Rosenfeld
2008-05-06 20:36 ` Hugh Dickins
2008-05-06 20:36 ` Hugh Dickins
2008-05-07 23:39 ` Nishanth Aravamudan
2008-05-07 23:39 ` Nishanth Aravamudan
2008-05-06 20:42 ` Dave Hansen
2008-05-06 20:42 ` Dave Hansen
2008-05-08 14:34 ` Hans Rosenfeld
2008-05-08 14:34 ` Hans Rosenfeld
2008-05-08 14:39 ` Hans Rosenfeld
2008-05-08 14:52 ` Dave Hansen
2008-05-08 14:52 ` Dave Hansen
2008-05-08 15:11 ` Hans Rosenfeld
2008-05-08 15:11 ` Hans Rosenfeld
2008-05-08 15:51 ` Dave Hansen
2008-05-08 15:51 ` Dave Hansen
2008-05-08 16:19 ` Hans Rosenfeld [this message]
2008-05-08 16:19 ` Hans Rosenfeld
2008-05-08 16:33 ` Nishanth Aravamudan
2008-05-08 16:33 ` Nishanth Aravamudan
2008-05-08 16:51 ` Hans Rosenfeld
2008-05-08 16:51 ` Hans Rosenfeld
2008-05-08 17:16 ` Nishanth Aravamudan
2008-05-08 17:16 ` Nishanth Aravamudan
2008-05-08 18:42 ` Dave Hansen
2008-05-08 18:42 ` Dave Hansen
2008-05-08 18:58 ` Hugh Dickins
2008-05-08 18:58 ` Hugh Dickins
2008-05-08 19:06 ` Dave Hansen
2008-05-08 19:06 ` Dave Hansen
2008-05-08 18:48 ` Hugh Dickins
2008-05-08 18:48 ` Hugh Dickins
2008-05-08 19:49 ` Matt Mackall
2008-05-08 19:49 ` Matt Mackall
2008-05-08 20:08 ` Dave Hansen
2008-05-08 20:08 ` Dave Hansen
2008-05-08 20:02 ` Hans Rosenfeld
2008-05-08 20:02 ` Hans Rosenfeld
2008-05-08 20:16 ` Dave Hansen
2008-05-08 20:16 ` Dave Hansen
2008-05-08 23:15 ` Dave Hansen
2008-05-08 23:15 ` Dave Hansen
2008-05-14 19:01 ` Matt Mackall
2008-05-14 19:01 ` Matt Mackall
2008-05-09 9:03 ` Paul Mundt
2008-05-09 9:03 ` Paul Mundt
2008-05-08 16:42 ` Dave Hansen
2008-05-08 16:42 ` Dave Hansen
2008-05-08 15:44 ` Nishanth Aravamudan
2008-05-08 15:44 ` Nishanth Aravamudan
2008-05-07 4:40 ` Jeff Chua
2008-05-07 4:40 ` Jeff Chua
2008-05-07 5:30 ` Hugh Dickins
2008-05-07 5:30 ` Hugh Dickins
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