When copying data from the journal to the appropriate place, we submit many I/Os. Some of these I/Os could go to adjacent areas. This patch uses the plug mechanism, so that the adjacent I/Os could be merged.
Signed-off-by: Mikulas Patocka <[email protected]> --- drivers/md/dm-integrity.c | 5 +++++ 1 file changed, 5 insertions(+) Index: linux-2.6/drivers/md/dm-integrity.c =================================================================== --- linux-2.6.orig/drivers/md/dm-integrity.c +++ linux-2.6/drivers/md/dm-integrity.c @@ -1822,6 +1822,9 @@ static void do_journal_write(struct dm_i { unsigned i, j, n; struct journal_completion comp; + struct blk_plug plug; + + blk_start_plug(&plug); comp.ic = ic; comp.in_flight = (atomic_t)ATOMIC_INIT(1); @@ -1946,6 +1949,8 @@ skip_io: dm_bufio_write_dirty_buffers_async(ic->bufio); + blk_finish_plug(&plug); + complete_journal_op(&comp); wait_for_completion_io(&comp.comp); -- dm-devel mailing list [email protected] https://www.redhat.com/mailman/listinfo/dm-devel
