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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 <[email protected]>
Reviewed-by: Rik van Riel <[email protected]>
Cc: Alex Thorlton <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Mel Gorman 2013-12-18 17:08:39 -08:00 • committed by Linus Torvalds
commit eb4489f69f
1 changed files with 3 additions and 1 deletions
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4
mm/migrate.c
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@ -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;