From: Peter Zijlstra <peterz@infradead.org>
To: Mel Gorman <mgorman@suse.de>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
Ingo Molnar <mingo@kernel.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm, sched, numa: Create a per-task MPOL_INTERLEAVE policy
Date: Fri, 26 Jul 2013 11:55:28 +0200 [thread overview]
Message-ID: <20130726095528.GB20909@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20130725104633.GQ27075@twins.programming.kicks-ass.net>
On Thu, Jul 25, 2013 at 12:46:33PM +0200, Peter Zijlstra wrote:
> @@ -2234,12 +2236,13 @@ static void sp_free(struct sp_node *n)
> * Policy determination "mimics" alloc_page_vma().
> * Called from fault path where we know the vma and faulting address.
> */
> -int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long addr)
> +int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long addr, int *account_node)
> {
> struct mempolicy *pol;
> struct zone *zone;
> int curnid = page_to_nid(page);
> unsigned long pgoff;
> + int thisnid = numa_node_id();
> int polnid = -1;
> int ret = -1;
>
> @@ -2261,7 +2264,7 @@ int mpol_misplaced(struct page *page, st
>
> case MPOL_PREFERRED:
> if (pol->flags & MPOL_F_LOCAL)
> - polnid = numa_node_id();
> + polnid = thisnid;
> else
> polnid = pol->v.preferred_node;
> break;
> @@ -2276,7 +2279,7 @@ int mpol_misplaced(struct page *page, st
> if (node_isset(curnid, pol->v.nodes))
> goto out;
> (void)first_zones_zonelist(
> - node_zonelist(numa_node_id(), GFP_HIGHUSER),
> + node_zonelist(thisnid, GFP_HIGHUSER),
> gfp_zone(GFP_HIGHUSER),
> &pol->v.nodes, &zone);
> polnid = zone->node;
> @@ -2291,8 +2294,7 @@ int mpol_misplaced(struct page *page, st
> int last_nidpid;
> int this_nidpid;
>
> - polnid = numa_node_id();
> - this_nidpid = nid_pid_to_nidpid(polnid, current->pid);;
> + this_nidpid = nid_pid_to_nidpid(thisnid, current->pid);;
>
> /*
> * Multi-stage node selection is used in conjunction
> @@ -2318,6 +2320,39 @@ int mpol_misplaced(struct page *page, st
> last_nidpid = page_nidpid_xchg_last(page, this_nidpid);
> if (!nidpid_pid_unset(last_nidpid) && nidpid_to_nid(last_nidpid) != polnid)
That should've become:
if (!nidpid_pid_unset(last_nidpid) && nidpid_to_nid(last_nidpid) != thisnid)
> goto out;
> +
> + /*
> + * Preserve interleave pages while allowing useful
> + * ->numa_faults[] statistics.
> + *
> + * When migrating into an interleave set, migrate to
> + * the correct interleaved node but account against the
> + * current node (where the task is running).
> + *
> + * Not doing this would result in ->numa_faults[] being
> + * flat across the interleaved nodes, making it
> + * impossible to shrink the node list even when all
> + * tasks are running on a single node.
> + *
> + * src dst migrate account
> + * 0 0 -- this_node $page_node
> + * 0 1 -- policy_node this_node
> + * 1 0 -- this_node $page_node
> + * 1 1 -- policy_node this_node
> + *
> + */
> + switch (pol->mode) {
> + case MPOL_INTERLEAVE:
> + if (node_isset(thisnid, pol->v.nodes)) {
> + if (account_node)
> + *account_node = thisnid;
> + }
> + break;
> +
> + default:
> + polnid = thisnid;
> + break;
> + }
> }
>
> if (curnid != polnid)
--
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next prev parent reply other threads:[~2013-07-26 9:55 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-15 15:20 [PATCH 0/18] Basic scheduler support for automatic NUMA balancing V5 Mel Gorman
2013-07-15 15:20 ` [PATCH 01/18] mm: numa: Document automatic NUMA balancing sysctls Mel Gorman
2013-07-15 15:20 ` [PATCH 02/18] sched: Track NUMA hinting faults on per-node basis Mel Gorman
2013-07-17 10:50 ` Peter Zijlstra
2013-07-31 7:54 ` Mel Gorman
2013-07-29 10:10 ` Peter Zijlstra
2013-07-31 7:54 ` Mel Gorman
2013-07-15 15:20 ` [PATCH 03/18] mm: numa: Account for THP numa hinting faults on the correct node Mel Gorman
2013-07-17 0:33 ` Hillf Danton
2013-07-17 1:26 ` Wanpeng Li
2013-07-17 1:26 ` Wanpeng Li
2013-07-15 15:20 ` [PATCH 04/18] mm: numa: Do not migrate or account for hinting faults on the zero page Mel Gorman
2013-07-17 11:00 ` Peter Zijlstra
2013-07-31 8:11 ` Mel Gorman
2013-07-15 15:20 ` [PATCH 05/18] sched: Select a preferred node with the most numa hinting faults Mel Gorman
2013-07-15 15:20 ` [PATCH 06/18] sched: Update NUMA hinting faults once per scan Mel Gorman
2013-07-15 15:20 ` [PATCH 07/18] sched: Favour moving tasks towards the preferred node Mel Gorman
2013-07-25 10:40 ` [PATCH] sched, numa: migrates_degrades_locality() Peter Zijlstra
2013-07-31 8:44 ` Mel Gorman
2013-07-31 8:50 ` Peter Zijlstra
2013-07-15 15:20 ` [PATCH 08/18] sched: Reschedule task on preferred NUMA node once selected Mel Gorman
2013-07-17 1:31 ` Hillf Danton
2013-07-31 9:07 ` Mel Gorman
2013-07-31 9:38 ` Srikar Dronamraju
2013-08-01 4:47 ` Srikar Dronamraju
2013-08-01 15:38 ` Mel Gorman
2013-07-15 15:20 ` [PATCH 09/18] sched: Add infrastructure for split shared/private accounting of NUMA hinting faults Mel Gorman
2013-07-17 2:17 ` Hillf Danton
2013-07-31 9:08 ` Mel Gorman
2013-07-15 15:20 ` [PATCH 10/18] sched: Increase NUMA PTE scanning when a new preferred node is selected Mel Gorman
2013-07-15 15:20 ` [PATCH 11/18] sched: Check current->mm before allocating NUMA faults Mel Gorman
2013-07-15 15:20 ` [PATCH 12/18] sched: Set the scan rate proportional to the size of the task being scanned Mel Gorman
2013-07-15 15:20 ` [PATCH 13/18] mm: numa: Scan pages with elevated page_mapcount Mel Gorman
2013-07-17 5:22 ` Sam Ben
2013-07-31 9:13 ` Mel Gorman
2013-07-15 15:20 ` [PATCH 14/18] sched: Remove check that skips small VMAs Mel Gorman
2013-07-15 15:20 ` [PATCH 15/18] sched: Set preferred NUMA node based on number of private faults Mel Gorman
2013-07-18 1:53 ` [PATCH 15/18] fix compilation with !CONFIG_NUMA_BALANCING Rik van Riel
2013-07-31 9:19 ` Mel Gorman
2013-07-26 11:20 ` [PATCH 15/18] sched: Set preferred NUMA node based on number of private faults Peter Zijlstra
2013-07-31 9:29 ` Mel Gorman
2013-07-31 9:34 ` Peter Zijlstra
2013-07-31 10:10 ` Mel Gorman
2013-07-15 15:20 ` [PATCH 16/18] sched: Avoid overloading CPUs on a preferred NUMA node Mel Gorman
2013-07-15 20:03 ` Peter Zijlstra
2013-07-16 8:23 ` Mel Gorman
2013-07-16 10:35 ` Peter Zijlstra
2013-07-16 15:55 ` Hillf Danton
2013-07-16 16:01 ` Mel Gorman
2013-07-17 10:54 ` Peter Zijlstra
2013-07-31 9:49 ` Mel Gorman
2013-08-01 7:10 ` Srikar Dronamraju
2013-08-01 15:42 ` Mel Gorman
2013-07-15 15:20 ` [PATCH 17/18] sched: Retry migration of tasks to CPU on a preferred node Mel Gorman
2013-07-25 10:33 ` Peter Zijlstra
2013-07-31 10:03 ` Mel Gorman
2013-07-31 10:05 ` Peter Zijlstra
2013-07-31 10:07 ` Mel Gorman
2013-07-25 10:35 ` Peter Zijlstra
2013-08-01 5:13 ` Srikar Dronamraju
2013-08-01 15:46 ` Mel Gorman
2013-07-15 15:20 ` [PATCH 18/18] sched: Swap tasks when reschuling if a CPU on a target node is imbalanced Mel Gorman
2013-07-15 20:11 ` Peter Zijlstra
2013-07-16 9:41 ` Mel Gorman
2013-08-01 4:59 ` Srikar Dronamraju
2013-08-01 15:48 ` Mel Gorman
2013-07-15 20:14 ` [PATCH 0/18] Basic scheduler support for automatic NUMA balancing V5 Peter Zijlstra
2013-07-16 15:10 ` Srikar Dronamraju
2013-07-25 10:36 ` Peter Zijlstra
2013-07-31 10:30 ` Mel Gorman
2013-07-31 10:48 ` Peter Zijlstra
2013-07-31 11:57 ` Mel Gorman
2013-07-31 15:30 ` Peter Zijlstra
2013-07-31 16:11 ` Mel Gorman
2013-07-31 16:39 ` Peter Zijlstra
2013-08-01 15:51 ` Mel Gorman
2013-07-25 10:38 ` [PATCH] mm, numa: Sanitize task_numa_fault() callsites Peter Zijlstra
2013-07-31 11:25 ` Mel Gorman
2013-07-25 10:41 ` [PATCH] sched, numa: Improve scanner Peter Zijlstra
2013-07-25 10:46 ` [PATCH] mm, sched, numa: Create a per-task MPOL_INTERLEAVE policy Peter Zijlstra
2013-07-26 9:55 ` Peter Zijlstra [this message]
2013-08-26 16:10 ` Peter Zijlstra
2013-08-26 16:14 ` Peter Zijlstra
2013-07-30 11:24 ` [PATCH] mm, numa: Change page last {nid,pid} into {cpu,pid} Peter Zijlstra
2013-08-01 22:33 ` Rik van Riel
2013-07-30 11:38 ` [PATCH] sched, numa: Use {cpu, pid} to create task groups for shared faults Peter Zijlstra
2013-07-31 15:07 ` Peter Zijlstra
2013-07-31 15:38 ` Peter Zijlstra
2013-07-31 15:45 ` Don Morris
2013-07-31 16:05 ` Peter Zijlstra
2013-08-02 16:47 ` [PATCH -v3] " Peter Zijlstra
2013-08-02 16:50 ` [PATCH] mm, numa: Do not group on RO pages Peter Zijlstra
2013-08-02 19:56 ` Peter Zijlstra
2013-08-05 19:36 ` [PATCH] numa,sched: use group fault statistics in numa placement Rik van Riel
2013-08-09 13:55 ` Don Morris
2013-08-28 16:41 ` [PATCH -v3] sched, numa: Use {cpu, pid} to create task groups for shared faults Peter Zijlstra
2013-08-28 17:10 ` Rik van Riel
2013-08-01 6:23 ` [PATCH,RFC] numa,sched: use group fault statistics in numa placement Rik van Riel
2013-08-01 10:37 ` Peter Zijlstra
2013-08-01 16:35 ` Rik van Riel
2013-08-01 22:36 ` [RFC PATCH -v2] " Rik van Riel
2013-07-30 13:58 ` [PATCH 0/18] Basic scheduler support for automatic NUMA balancing V5 Andrew Theurer
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