On Mon, Feb 03, 2014 at 07:53:36PM -0500, Johannes Weiner wrote: > Page cache radix tree slots are usually stabilized by the page lock, > but shmem's swap cookies have no such thing. Because the overall > truncation loop is lockless, the swap entry is currently confirmed by > a tree lookup and then deleted by another tree lookup under the same > tree lock region. > > Use radix_tree_delete_item() instead, which does the verification and > deletion with only one lookup. This also allows removing the > delete-only special case from shmem_radix_tree_replace(). > > Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> > Reviewed-by: Minchan Kim <minchan@xxxxxxxxxx> > Reviewed-by: Rik van Riel <riel@xxxxxxxxxx> Acked-by: Mel Gorman <mgorman@xxxxxxx> -- Mel Gorman SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
