From: Rik van Riel <riel@redhat.com>
To: Mel Gorman <mgorman@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Andrea Arcangeli <aarcange@redhat.com>,
Ingo Molnar <mingo@kernel.org>,
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 26/31] sched: numa: Make mempolicy home-node aware
Date: Wed, 14 Nov 2012 13:22:33 -0500 [thread overview]
Message-ID: <50A3E169.4010402@redhat.com> (raw)
In-Reply-To: <1352805180-1607-27-git-send-email-mgorman@suse.de>
On 11/13/2012 06:12 AM, Mel Gorman wrote:
> From: Peter Zijlstra <a.p.zijlstra@chello.nl>
>
> Add another layer of fallback policy to make the home node concept
> useful from a memory allocation PoV.
>
> This changes the mpol order to:
>
> - vma->vm_ops->get_policy [if applicable]
> - vma->vm_policy [if applicable]
> - task->mempolicy
> - tsk_home_node() preferred [NEW]
> - default_policy
Why is the home node policy not the default policy?
> Note that the tsk_home_node() policy has Migrate-on-Fault enabled to
> facilitate efficient on-demand memory migration.
>
> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Cc: Paul Turner <pjt@google.com>
> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
> Cc: Christoph Lameter <cl@linux.com>
> Cc: Rik van Riel <riel@redhat.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Signed-off-by: Ingo Molnar <mingo@kernel.org>
> Signed-off-by: Mel Gorman <mgorman@suse.de>
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next prev parent reply other threads:[~2012-11-14 18:22 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-13 11:12 [RFC PATCH 00/31] Foundation for automatic NUMA balancing V2 Mel Gorman
2012-11-13 11:12 ` [PATCH 01/31] mm: compaction: Move migration fail/success stats to migrate.c Mel Gorman
2012-11-13 11:12 ` [PATCH 02/31] mm: migrate: Add a tracepoint for migrate_pages Mel Gorman
2012-11-13 11:12 ` [PATCH 03/31] mm: compaction: Add scanned and isolated counters for compaction Mel Gorman
2012-11-13 11:12 ` [PATCH 04/31] mm: numa: define _PAGE_NUMA Mel Gorman
2012-11-13 11:12 ` [PATCH 05/31] mm: numa: pte_numa() and pmd_numa() Mel Gorman
2012-11-13 11:12 ` [PATCH 06/31] mm: numa: teach gup_fast about pmd_numa Mel Gorman
2012-11-13 11:12 ` [PATCH 07/31] mm: numa: split_huge_page: transfer the NUMA type from the pmd to the pte Mel Gorman
2012-11-14 17:13 ` Rik van Riel
2012-11-13 11:12 ` [PATCH 08/31] mm: numa: Create basic numa page hinting infrastructure Mel Gorman
2012-11-13 11:12 ` [PATCH 09/31] mm: mempolicy: Make MPOL_LOCAL a real policy Mel Gorman
2012-11-13 11:12 ` [PATCH 10/31] mm: mempolicy: Add MPOL_MF_NOOP Mel Gorman
2012-11-13 11:12 ` [PATCH 11/31] mm: mempolicy: Check for misplaced page Mel Gorman
2012-11-13 11:12 ` [PATCH 12/31] mm: migrate: Introduce migrate_misplaced_page() Mel Gorman
2012-11-13 11:12 ` [PATCH 13/31] mm: mempolicy: Use _PAGE_NUMA to migrate pages Mel Gorman
2012-11-13 11:12 ` [PATCH 14/31] mm: mempolicy: Add MPOL_MF_LAZY Mel Gorman
2012-11-13 11:12 ` [PATCH 15/31] mm: numa: Add fault driven placement and migration Mel Gorman
2012-11-13 11:12 ` [PATCH 16/31] mm: numa: Only call task_numa_placement for misplaced pages Mel Gorman
2012-11-14 17:58 ` Rik van Riel
2012-11-14 18:18 ` Mel Gorman
2012-11-13 11:12 ` [PATCH 17/31] mm: numa: Avoid double faulting after migrating misplaced page Mel Gorman
2012-11-14 18:00 ` Rik van Riel
2012-11-13 11:12 ` [PATCH 18/31] mm: sched: numa: Implement constant, per task Working Set Sampling (WSS) rate Mel Gorman
2012-11-13 11:12 ` [PATCH 19/31] mm: sched: numa: Implement slow start for working set sampling Mel Gorman
2012-11-13 11:12 ` [PATCH 20/31] mm: numa: Add pte updates, hinting and migration stats Mel Gorman
2012-11-13 11:12 ` [PATCH 21/31] mm: numa: Migrate on reference policy Mel Gorman
2012-11-13 11:12 ` [PATCH 22/31] x86: mm: only do a local tlb flush in ptep_set_access_flags() Mel Gorman
2012-11-13 11:12 ` [PATCH 23/31] x86: mm: drop TLB flush from ptep_set_access_flags Mel Gorman
2012-11-13 11:12 ` [PATCH 24/31] mm,generic: only flush the local TLB in ptep_set_access_flags Mel Gorman
2012-11-13 11:12 ` [PATCH 25/31] sched: numa: Introduce tsk_home_node() Mel Gorman
2012-11-13 11:12 ` [PATCH 26/31] sched: numa: Make mempolicy home-node aware Mel Gorman
2012-11-14 18:22 ` Rik van Riel [this message]
2012-11-14 18:50 ` Mel Gorman
2012-11-13 11:12 ` [PATCH 27/31] sched: numa: Make find_busiest_queue() a method Mel Gorman
2012-11-14 18:25 ` Rik van Riel
2012-11-13 11:12 ` [PATCH 28/31] sched: numa: Implement home-node awareness Mel Gorman
2012-11-13 11:12 ` [PATCH 29/31] sched: numa: CPU follows memory Mel Gorman
2012-11-14 11:20 ` Mel Gorman
2012-11-13 11:12 ` [PATCH 30/31] mm: numa: Introduce last_nid to the page frame Mel Gorman
2012-11-13 11:13 ` [PATCH 31/31] mm: numa: Use a two-stage filter to restrict pages being migrated for unlikely task<->node relationships Mel Gorman
2012-11-13 15:14 ` [RFC PATCH 00/31] Foundation for automatic NUMA balancing V2 Ingo Molnar
2012-11-13 15:42 ` Mel Gorman
2012-11-13 17:27 ` Ingo Molnar
2012-11-14 4:09 ` Rik van Riel
2012-11-14 12:24 ` Mel Gorman
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