Hi Joe Could you please try this patch http://people.redhat.com/agk/patches/linux/editing/dm-bufio-submit-writes-outside-lock.patch and test if it generates some regressions for dm-thin? Run some benchmark that you normally use for dm-thin and test if it is better, same or worse with the patch. The patch changes dm-bufio so that it drops the lock when submitting bios inside dm_bufio_write_dirty_buffers so that there is more parallelism. Mikulas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
