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mm: numa: avoid unnecessary work on the failure path

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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>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mel Gorman 2013-12-18 17:08:39 -08:00 committed by Linus Torvalds
parent c3a489cac3
commit eb4489f69f
1 changed files with 3 additions and 1 deletions
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mm/migrate.c
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@ -1780,7 +1780,8 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm,
putback_lru_page(page); putback_lru_page(page);
mod_zone_page_state(page_zone(page), mod_zone_page_state(page_zone(page),
NR_ISOLATED_ANON + page_lru, -HPAGE_PMD_NR); NR_ISOLATED_ANON + page_lru, -HPAGE_PMD_NR);
goto out_fail;
goto out_unlock;
} }
/* /*
@ -1854,6 +1855,7 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm,
} }
spin_unlock(ptl); spin_unlock(ptl);
out_unlock:
unlock_page(page); unlock_page(page);
put_page(page); put_page(page);
return 0; return 0;