On Wed, 9 Jan 2013, Mel Gorman wrote:
> As pointed out by Hugh Dickins, "mm: migrate: Check page_count of THP
> before migrating" can leave nr_isolated_anon elevated, correct it. This
> is a fix to mm-migrate-check-page_count-of-thp-before-migrating.patch
>
> Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
Thanks: to this and the one it's fixing (I expect akpm will merge)
Acked-by: Hugh Dickins <hughd@xxxxxxxxxx>
> ---
> mm/migrate.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/mm/migrate.c b/mm/migrate.c
> index f466827..c387786 100644
> --- a/mm/migrate.c
> +++ b/mm/migrate.c
> @@ -1689,8 +1689,11 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm,
> if (!isolated || page_count(page) != 2) {
> count_vm_events(PGMIGRATE_FAIL, HPAGE_PMD_NR);
> put_page(new_page);
> - if (isolated)
> + if (isolated) {
> putback_lru_page(page);
> + isolated = 0;
> + goto out;
> + }
> goto out_keep_locked;
> }
--
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