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authorMel Gorman <mgorman@suse.de>2013-12-18 17:08:39 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-01-09 12:24:23 -0800
commita29ccdd1b5a61fad7d4883b3ef63da3a313f1e44 (patch)
tree35589e2f1f251451b6b3b11765bf3738d42defd6
parent4455c567b8a231d6aa8bf077facfa559d2605357 (diff)
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mm: numa: avoid unnecessary work on the failure path
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@suse.de> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Alex Thorlton <athorlton@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--mm/migrate.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index bf436c15f05..a88c12f2235 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1715,7 +1715,8 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm,
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;
}
/*
@@ -1765,6 +1766,7 @@ out_dropref:
set_pmd_at(mm, haddr, pmd, entry);
update_mmu_cache_pmd(vma, address, &entry);
+out_unlock:
unlock_page(page);
put_page(page);
return 0;