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From: David Vrabel <david.vrabel@citrix.com>
To: Mel Gorman <mgorman@suse.de>
Cc: Ingo Molnar <mingo@redhat.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Steven Noonan <steven@uplinklabs.net>,
	Andrew Morton <akpm@linux-foundation.org>,
	George Dunlap <george.dunlap@eu.citrix.com>,
	Dario Faggioli <dario.faggioli@citrix.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Rik van Riel <riel@redhat.com>,
	Elena Ufimtseva <ufimtseva@gmail.com>,
	Linux Kernel mailing List <linux-kernel@vger.kernel.org>,
	Linux-MM <linux-mm@kvack.org>, Linux-X86 <x86@kernel.org>,
	xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH] Subject: [PATCH] xen: Properly account for _PAGE_NUMA during xen pte translations
Date: Tue, 4 Feb 2014 11:48:45 +0000	[thread overview]
Message-ID: <52F0D39D.4050409@citrix.com> (raw)
In-Reply-To: <20140204114445.GM6732@suse.de>

On 04/02/14 11:44, Mel Gorman wrote:
> Steven Noonan forwarded a users report where they had a problem starting
> vsftpd on a Xen paravirtualized guest, with this in dmesg:
> 
[...]
> 
> The issue could not be reproduced under an HVM instance with the same kernel,
> so it appears to be exclusive to paravirtual Xen guests. He bisected the
> problem to commit 1667918b (mm: numa: clear numa hinting information on
> mprotect) that was also included in 3.12-stable.
> 
> The problem was related to how xen translates ptes because it was not
> accounting for the _PAGE_NUMA bit. This patch splits pte_present to add
> a pteval_present helper for use by xen so both bare metal and xen use
> the same code when checking if a PTE is present.

Reviewed-by: David Vrabel <david.vrabel@citrix.com>

Thanks.

David

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WARNING: multiple messages have this Message-ID (diff)
From: David Vrabel <david.vrabel@citrix.com>
To: Mel Gorman <mgorman@suse.de>
Cc: Ingo Molnar <mingo@redhat.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Steven Noonan <steven@uplinklabs.net>,
	Andrew Morton <akpm@linux-foundation.org>,
	George Dunlap <george.dunlap@eu.citrix.com>,
	Dario Faggioli <dario.faggioli@citrix.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Rik van Riel <riel@redhat.com>,
	Elena Ufimtseva <ufimtseva@gmail.com>,
	Linux Kernel mailing List <linux-kernel@vger.kernel.org>,
	Linux-MM <linux-mm@kvack.org>, Linux-X86 <x86@kernel.org>,
	xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH] Subject: [PATCH] xen: Properly account for _PAGE_NUMA during xen pte translations
Date: Tue, 4 Feb 2014 11:48:45 +0000	[thread overview]
Message-ID: <52F0D39D.4050409@citrix.com> (raw)
In-Reply-To: <20140204114445.GM6732@suse.de>

On 04/02/14 11:44, Mel Gorman wrote:
> Steven Noonan forwarded a users report where they had a problem starting
> vsftpd on a Xen paravirtualized guest, with this in dmesg:
> 
[...]
> 
> The issue could not be reproduced under an HVM instance with the same kernel,
> so it appears to be exclusive to paravirtual Xen guests. He bisected the
> problem to commit 1667918b (mm: numa: clear numa hinting information on
> mprotect) that was also included in 3.12-stable.
> 
> The problem was related to how xen translates ptes because it was not
> accounting for the _PAGE_NUMA bit. This patch splits pte_present to add
> a pteval_present helper for use by xen so both bare metal and xen use
> the same code when checking if a PTE is present.

Reviewed-by: David Vrabel <david.vrabel@citrix.com>

Thanks.

David

  reply	other threads:[~2014-02-04 11:48 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-01-21 23:27 [BISECTED] Linux 3.12.7 introduces page map handling regression Steven Noonan
2014-01-22  1:49 ` Greg Kroah-Hartman
2014-01-22  2:47   ` Linus Torvalds
2014-01-22  3:20     ` Steven Noonan
2014-01-22  5:02       ` Konrad Rzeszutek Wilk
2014-01-22  5:02       ` Konrad Rzeszutek Wilk
2014-01-22  7:29         ` Steven Noonan
2014-01-22 14:29           ` Daniel Borkmann
2014-01-22 14:29           ` Daniel Borkmann
2014-01-22 20:18             ` Elena Ufimtseva
2014-01-22 20:33               ` Steven Noonan
2014-01-23 16:23                 ` Elena Ufimtseva
2014-01-23 16:23                 ` Elena Ufimtseva
2014-01-23 23:20                   ` Steven Noonan
2014-01-24  4:28                     ` Elena Ufimtseva
2014-01-24  4:28                     ` Elena Ufimtseva
2014-01-23 23:20                   ` Steven Noonan
2014-01-24 11:05                   ` David Vrabel
2014-01-24 11:05                   ` David Vrabel
2014-01-24 13:38                   ` Mel Gorman
2014-01-24 13:38                   ` Mel Gorman
2014-01-26 18:02                     ` Elena Ufimtseva
2014-01-26 18:02                     ` Elena Ufimtseva
2014-02-04  6:58                       ` Elena Ufimtseva
2014-02-04  6:58                       ` Elena Ufimtseva
2014-02-04 11:44                         ` [PATCH] Subject: [PATCH] xen: Properly account for _PAGE_NUMA during xen pte translations Mel Gorman
2014-02-04 11:44                         ` Mel Gorman
2014-02-04 11:44                           ` Mel Gorman
2014-02-04 11:48                           ` David Vrabel [this message]
2014-02-04 11:48                             ` David Vrabel
2014-02-04 14:38                             ` Konrad Rzeszutek Wilk
2014-02-04 14:38                               ` Konrad Rzeszutek Wilk
2014-02-04 14:38                             ` Konrad Rzeszutek Wilk
2014-02-04 11:48                           ` David Vrabel
2014-01-22 20:33               ` [BISECTED] Linux 3.12.7 introduces page map handling regression Steven Noonan
2014-01-22 20:18             ` Elena Ufimtseva
2014-01-22  7:29         ` Steven Noonan
2014-01-22 18:07     ` Rik van Riel
2014-01-22 18:24       ` Linus Torvalds
2014-01-22 18:39         ` Rik van Riel
2014-01-24 11:43           ` Mel Gorman
2014-01-23 17:03 ` Mel Gorman

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