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    Subject[PATCH v2 12/17] mm: ensure that we set mapping error if writeout() fails
    Date
    If writepage fails during a page migration, then we need to ensure that
    fsync will see it by flagging the mapping.

    Signed-off-by: Jeff Layton <jlayton@redhat.com>
    ---
    mm/migrate.c | 6 +++++-
    1 file changed, 5 insertions(+), 1 deletion(-)

    diff --git a/mm/migrate.c b/mm/migrate.c
    index ed97c2c14fa8..a77b9e769d0b 100644
    --- a/mm/migrate.c
    +++ b/mm/migrate.c
    @@ -792,7 +792,11 @@ static int writeout(struct address_space *mapping, struct page *page)
    /* unlocked. Relock */
    lock_page(page);

    - return (rc < 0) ? -EIO : -EAGAIN;
    + if (rc < 0) {
    + mapping_set_error(mapping, rc);
    + return -EIO;
    + }
    + return -EAGAIN;
    }

    /*
    --
    2.9.3
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