Hi Here I'm sending the patch for dm-bufio last_accessed. (bug 1145230) BTW. do you think that we also need to increase default max_age value (60 seconds)? What do you think the default value should be? Mikulas From: Mikulas Patocka <mpatocka@xxxxxxxxxx> The variable last_accessed was set only once when the buffer was created. In the result, the buffer was discarded after dm_bufio_max_age, even if it was used recently. This patch changes it so that last_accessed is set each time the buffer is moved to the head of the LRU list, so the buffer is discarded if it was not used in dm_bufio_max_age time. Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # v3.2+ --- drivers/md/dm-bufio.c | 1 + 1 file changed, 1 insertion(+) Index: linux-3.17-rc7/drivers/md/dm-bufio.c =================================================================== --- linux-3.17-rc7.orig/drivers/md/dm-bufio.c 2014-09-30 17:41:31.000000000 +0200 +++ linux-3.17-rc7/drivers/md/dm-bufio.c 2014-09-30 17:41:57.000000000 +0200 @@ -465,6 +465,7 @@ static void __relink_lru(struct dm_buffe c->n_buffers[dirty]++; b->list_mode = dirty; list_move(&b->lru_list, &c->lru[dirty]); + b->last_accessed = jiffies; } /*---------------------------------------------------------------- -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
