[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-stable-commits
Subject:    Patch "mm: page_alloc: abort fair zone allocation policy when remotes nodes are encountered" has bee
From:       <gregkh () linuxfoundation ! org>
Date:       2015-01-28 1:13:23
Message-ID: 142240760313719 () kroah ! com
[Download RAW message or body]


This is a note to let you know that I've just added the patch titled

    mm: page_alloc: abort fair zone allocation policy when remotes nodes are encountered

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mm-page_alloc-abort-fair-zone-allocation-policy-when-remotes-nodes-are-encountered.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


From stable-owner@vger.kernel.org Thu Aug 28 11:44:23 2014
From: Mel Gorman <mgorman@suse.de>
Date: Thu, 28 Aug 2014 19:35:44 +0100
Subject: mm: page_alloc: abort fair zone allocation policy when remotes nodes are encountered

From: Mel Gorman <mgorman@suse.de>

commit f7b5d647946aae1647bf5cd26c16b3a793c1ac49 upstream.

The purpose of numa_zonelist_order=zone is to preserve lower zones for
use with 32-bit devices.  If locality is preferred then the
numa_zonelist_order=node policy should be used.

Unfortunately, the fair zone allocation policy overrides this by
skipping zones on remote nodes until the lower one is found.  While this
makes sense from a page aging and performance perspective, it breaks the
expected zonelist policy.  This patch restores the expected behaviour
for zone-list ordering.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 mm/page_alloc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1980,7 +1980,7 @@ zonelist_scan:
 		 */
 		if (alloc_flags & ALLOC_FAIR) {
 			if (!zone_local(preferred_zone, zone))
-				continue;
+				break;
 			if (atomic_long_read(&zone->vm_stat[NR_ALLOC_BATCH]) <= 0)
 				continue;
 		}


Patches currently in stable-queue which might be from mgorman@suse.de are

queue-3.14/mm-move-zone-pages_scanned-into-a-vmstat-counter.patch
queue-3.14/mm-vmscan-only-update-per-cpu-thresholds-for-online-cpu.patch
queue-3.14/mm-page_alloc-use-jump-labels-to-avoid-checking-number_of_cpusets.patch
queue-3.14/mm-page_alloc-do-not-treat-a-zone-that-cannot-be-used-for-dirty-pages-as-full.patch
queue-3.14/mm-non-atomically-mark-page-accessed-during-page-cache-allocation-where-possible.patch
queue-3.14/mm-page_alloc-convert-hot-cold-parameter-and-immediate-callers-to-bool.patch
queue-3.14/memcg-vmscan-fix-forced-scan-of-anonymous-pages.patch
queue-3.14/mm-thp-only-collapse-hugepages-to-nodes-with-affinity-for-zone_reclaim_mode.patch
queue-3.14/mm-page_alloc-only-check-the-zone-id-check-if-pages-are-buddies.patch
queue-3.14/mm-page_alloc-only-check-the-alloc-flags-and-gfp_mask-for-dirty-once.patch
queue-3.14/mm-page_alloc-do-not-update-zlc-unless-the-zlc-is-active.patch
queue-3.14/mm-swap.c-clean-up-lru_cache_add-functions.patch
queue-3.14/mm-page_alloc-take-the-alloc_no_watermark-check-out-of-the-fast-path.patch
queue-3.14/fs-buffer-do-not-use-unnecessary-atomic-operations-when-discarding-buffers.patch
queue-3.14/mm-do-not-use-atomic-operations-when-releasing-pages.patch
queue-3.14/mm-page_alloc-reduce-number-of-times-page_to_pfn-is-called.patch
queue-3.14/mm-page_alloc-use-unsigned-int-for-order-in-more-places.patch
queue-3.14/mm-avoid-unnecessary-atomic-operations-during-end_page_writeback.patch
queue-3.14/vmalloc-use-rcu-list-iterator-to-reduce-vmap_area_lock-contention.patch
queue-3.14/mm-page_alloc-abort-fair-zone-allocation-policy-when-remotes-nodes-are-encountered.patch
queue-3.14/mm-page_alloc-reduce-cost-of-the-fair-zone-allocation-policy.patch
queue-3.14/mm-shmem-avoid-atomic-operation-during-shmem_getpage_gfp.patch
queue-3.14/mm-pagemap-avoid-unnecessary-overhead-when-tracepoints-are-deactivated.patch
queue-3.14/shmem-fix-init_page_accessed-use-to-stop-pagelru-bug.patch
queue-3.14/mm-memory.c-use-entry-access_once-pte-in-handle_pte_fault.patch
queue-3.14/mm-make-copy_pte_range-static-again.patch
queue-3.14/mm-rearrange-zone-fields-into-read-only-page-alloc-statistics-and-page-reclaim-lines.patch
queue-3.14/mm-do-not-use-unnecessary-atomic-operations-when-adding-pages-to-the-lru.patch
queue-3.14/include-linux-jump_label.h-expose-the-reference-count.patch
queue-3.14/mm-page_alloc-calculate-classzone_idx-once-from-the.patch
queue-3.14/mm-page_alloc-lookup-pageblock-migratetype-with-irqs-enabled-during-free.patch
--
To unsubscribe from this list: send the line "unsubscribe stable-commits" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
[prev in list] [next in list] [prev in thread] [next in thread]