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From: Rik van Riel <riel@redhat.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Hugh Dickins <hughd@google.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Linux-MM <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 12/19] mm: migrate: Introduce migrate_misplaced_page()
Date: Tue, 13 Nov 2012 09:49:09 -0500	[thread overview]
Message-ID: <50A25DE5.1040202@redhat.com> (raw)
In-Reply-To: <20121113114344.GA26305@gmail.com>

On 11/13/2012 06:43 AM, Ingo Molnar wrote:
>
> * Ingo Molnar <mingo@kernel.org> wrote:
>
>>
>> * Mel Gorman <mgorman@suse.de> wrote:
>>
>>> From: Peter Zijlstra <a.p.zijlstra@chello.nl>
>>>
>>> Note: This was originally based on Peter's patch "mm/migrate: Introduce
>>> 	migrate_misplaced_page()" but borrows extremely heavily from Andrea's
>>> 	"autonuma: memory follows CPU algorithm and task/mm_autonuma stats
>>> 	collection". The end result is barely recognisable so signed-offs
>>> 	had to be dropped. If original authors are ok with it, I'll
>>> 	re-add the signed-off-bys.
>>>
>>> Add migrate_misplaced_page() which deals with migrating pages from
>>> faults.
>>>
>>> Based-on-work-by: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
>>> Based-on-work-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
>>> Based-on-work-by: Andrea Arcangeli <aarcange@redhat.com>
>>> Signed-off-by: Mel Gorman <mgorman@suse.de>
>>> ---
>>>   include/linux/migrate.h |    8 ++++
>>>   mm/migrate.c            |  104 ++++++++++++++++++++++++++++++++++++++++++++++-
>>>   2 files changed, 110 insertions(+), 2 deletions(-)
>>
>> That's a nice patch - the TASK_NUMA_FAULT approach in the
>> original patch was not very elegant.
>>
>> I've started testing it to see how well your version works.
>
> Hm, I'm seeing some instability - see the boot crash below. If I
> undo your patch it goes away.
>
> ( To help debugging this I've attached migration.patch which
>    applies your patch on top of Peter's latest queue of patches.
>    If I revert this patch then the crash goes away. )
>
> I've gone back to the well-tested page migration code from Peter
> for the time being.

Is there a place we can see your code?

Peter's patch with MIGRATE_FAULT is very much NAKed, so
this approach does need to be made to work...

You can either make the working tree public somewhere,
so we can help, or figure it out yourself. Your choice :)

-- 
All rights reversed

  parent reply	other threads:[~2012-11-13 14:49 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-11-06  9:14 [RFC PATCH 00/19] Foundation for automatic NUMA balancing Mel Gorman
2012-11-06  9:14 ` [PATCH 01/19] mm: compaction: Move migration fail/success stats to migrate.c Mel Gorman
2012-11-06 17:32   ` Rik van Riel
2012-11-06  9:14 ` [PATCH 02/19] mm: migrate: Add a tracepoint for migrate_pages Mel Gorman
2012-11-06 17:33   ` Rik van Riel
2012-11-06  9:14 ` [PATCH 03/19] mm: compaction: Add scanned and isolated counters for compaction Mel Gorman
2012-11-06 17:35   ` Rik van Riel
2012-11-06  9:14 ` [PATCH 04/19] mm: numa: define _PAGE_NUMA Mel Gorman
2012-11-06 18:35   ` Rik van Riel
2012-11-06  9:14 ` [PATCH 05/19] mm: numa: pte_numa() and pmd_numa() Mel Gorman
2012-11-13  9:54   ` Ingo Molnar
2012-11-13 11:24     ` Mel Gorman
2012-11-06  9:14 ` [PATCH 06/19] mm: numa: teach gup_fast about pmd_numa Mel Gorman
2012-11-13 10:07   ` Ingo Molnar
2012-11-13 11:37     ` Mel Gorman
2012-11-13 13:51       ` Ingo Molnar
2012-11-06  9:14 ` [PATCH 07/19] mm: numa: split_huge_page: transfer the NUMA type from the pmd to the pte Mel Gorman
2012-11-06  9:14 ` [PATCH 08/19] mm: numa: Create basic numa page hinting infrastructure Mel Gorman
2012-11-06 18:58   ` Rik van Riel
2012-11-07 10:38     ` Mel Gorman
2012-11-07 10:48       ` Rik van Riel
2012-11-07 11:00         ` Mel Gorman
2012-11-13 10:21   ` Ingo Molnar
2012-11-13 11:50     ` Mel Gorman
2012-11-13 13:49       ` Ingo Molnar
2012-11-13 14:26         ` Mel Gorman
2012-11-06  9:14 ` [PATCH 09/19] mm: mempolicy: Make MPOL_LOCAL a real policy Mel Gorman
2012-11-06  9:14 ` [PATCH 10/19] mm: mempolicy: Add MPOL_MF_NOOP Mel Gorman
2012-11-06  9:14 ` [PATCH 11/19] mm: mempolicy: Check for misplaced page Mel Gorman
2012-11-06  9:14 ` [PATCH 12/19] mm: migrate: Introduce migrate_misplaced_page() Mel Gorman
2012-11-06 19:10   ` Rik van Riel
2012-11-13  9:36   ` Ingo Molnar
2012-11-13 11:43     ` Ingo Molnar
2012-11-13 11:56       ` Mel Gorman
2012-11-13 14:49       ` Rik van Riel [this message]
2012-11-06  9:14 ` [PATCH 13/19] mm: mempolicy: Use _PAGE_NUMA to migrate pages Mel Gorman
2012-11-06 19:18   ` Rik van Riel
2012-11-07 12:32     ` Mel Gorman
2012-11-06  9:14 ` [PATCH 14/19] mm: mempolicy: Add MPOL_MF_LAZY Mel Gorman
2012-11-06 19:19   ` Rik van Riel
2012-11-13 10:25   ` Ingo Molnar
2012-11-13 12:02     ` Mel Gorman
2012-11-06  9:14 ` [PATCH 15/19] mm: numa: Add fault driven placement and migration Mel Gorman
2012-11-06 19:41   ` Rik van Riel
2012-11-07 10:49     ` Mel Gorman
2012-11-07 11:46       ` Rik van Riel
2012-11-13 10:45   ` Ingo Molnar
2012-11-13 12:09     ` Mel Gorman
2012-11-13 13:39       ` Ingo Molnar
2012-11-06  9:14 ` [PATCH 16/19] mm: numa: Add pte updates, hinting and migration stats Mel Gorman
2012-11-06 19:55   ` Rik van Riel
2012-11-07 10:57     ` Mel Gorman
2012-11-07 11:47       ` Rik van Riel
2012-11-06  9:14 ` [PATCH 17/19] mm: numa: Migrate on reference policy Mel Gorman
2012-11-07 11:56   ` Rik van Riel
2012-11-06  9:14 ` [PATCH 18/19] mm: sched: numa: Implement constant, per task Working Set Sampling (WSS) rate Mel Gorman
2012-11-06 19:55   ` Rik van Riel
2012-11-06  9:14 ` [PATCH 19/19] mm: sched: numa: Implement slow start for working set sampling Mel Gorman
2012-11-06 19:56   ` Rik van Riel
2012-11-07  9:27 ` [RFC PATCH 00/19] Foundation for automatic NUMA balancing Zhouping Liu
2012-11-07 15:25   ` Mel Gorman
2012-11-08  6:37     ` Zhouping Liu
     [not found]       ` <CAOHXNFG=T63dmc3smkJ2juE7HpxTv6qbavBXycRsXiLBzAwMGw@mail.gmail.com>
2012-11-08  7:03         ` Zhouping Liu
2012-11-09 14:42 ` Andrea Arcangeli
2012-11-09 16:12   ` Mel Gorman

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