This is a note to let you know that I've just added the patch titled
mm: numa: avoid unnecessary work on the failure path
to the 3.12-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-numa-avoid-unnecessary-work-on-the-failure-path.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From mgorman@xxxxxxx Tue Jan 7 09:51:39 2014
From: Mel Gorman <mgorman@xxxxxxx>
Date: Tue, 7 Jan 2014 14:00:42 +0000
Subject: mm: numa: avoid unnecessary work on the failure path
To: gregkh@xxxxxxxxxxxxxxxxxxx
Cc: athorlton@xxxxxxx, riel@xxxxxxxxxx, chegu_vinod@xxxxxx, Mel Gorman <mgorman@xxxxxxx>, stable@xxxxxxxxxxxxxxx
Message-ID: <1389103248-17617-8-git-send-email-mgorman@xxxxxxx>
From: Mel Gorman <mgorman@xxxxxxx>
commit eb4489f69f224356193364dc2762aa009738ca7f upstream.
If a PMD changes during a THP migration then migration aborts but the
failure path is doing more work than is necessary.
Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
Cc: Alex Thorlton <athorlton@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
mm/migrate.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1726,7 +1726,8 @@ fail_putback:
putback_lru_page(page);
mod_zone_page_state(page_zone(page),
NR_ISOLATED_ANON + page_lru, -HPAGE_PMD_NR);
- goto out_fail;
+
+ goto out_unlock;
}
/*
@@ -1800,6 +1801,7 @@ out_dropref:
}
spin_unlock(&mm->page_table_lock);
+out_unlock:
unlock_page(page);
put_page(page);
return 0;
Patches currently in stable-queue which might be from mgorman@xxxxxxx are
queue-3.12/sched-numa-skip-inaccessible-vmas.patch
queue-3.12/mm-compaction-respect-ignore_skip_hint-in-update_pageblock_skip.patch
queue-3.12/mm-clear-pmd_numa-before-invalidating.patch
queue-3.12/mm-numa-ensure-anon_vma-is-locked-to-prevent-parallel-thp-splits.patch
queue-3.12/mm-numa-do-not-clear-pte-for-pte_numa-update.patch
queue-3.12/mm-hugetlb-check-for-pte-null-pointer-in-__page_check_address.patch
queue-3.12/mm-numa-serialise-parallel-get_user_page-against-thp-migration.patch
queue-3.12/mm-munlock-fix-deadlock-in-__munlock_pagevec.patch
queue-3.12/mm-numa-avoid-unnecessary-work-on-the-failure-path.patch
queue-3.12/mm-page_alloc-revert-numa-aspect-of-fair-allocation-policy.patch
queue-3.12/mm-mempolicy-correct-putback-method-for-isolate-pages-if-failed.patch
queue-3.12/mm-numa-do-not-clear-pmd-during-pte-update-scan.patch
queue-3.12/mm-numa-call-mmu-notifiers-on-thp-migration.patch
queue-3.12/mm-munlock-fix-a-bug-where-thp-tail-page-is-encountered.patch
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