Hi I created dm-bufio patchset that keep some amount of cache indefinitely, regardless of the timeout (the default is to keep 1/500 of total memory indefinitely). I uploaded it here: http://people.redhat.com/~mpatocka/patches/kernel/dm-bufio-cache/ Try it, if it helps, we can backport it. If you think that we should use different default values (for example, increase the max_age value), say it. Mikulas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel