From: Mel Gorman <mgorman@xxxxxxx> Subject: mm: numa: avoid unnecessary work on the failure path 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> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/migrate.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff -puN mm/migrate.c~mm-numa-avoid-unnecessary-work-on-the-failure-path mm/migrate.c --- a/mm/migrate.c~mm-numa-avoid-unnecessary-work-on-the-failure-path +++ a/mm/migrate.c @@ -1780,7 +1780,8 @@ 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; } /* @@ -1854,6 +1855,7 @@ out_dropref: } spin_unlock(ptl); +out_unlock: unlock_page(page); put_page(page); return 0; _ -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html