Commits
Mikulas Patocka committed 6e913b28cd2
dm bufio: introduce a global cache replacement This commit introduces a global cache replacement (instead of per-client cleanup). If one bufio client uses the cache heavily and another client is not using it, we want to let the first client use most of the cache. The old algorithm would partition the cache equally betwen the clients and that is sub-optimal. For cache replacement, we use the clock algorithm because it doesn't require taking any lock when the buffer is accessed. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>