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Commit a7c3e62b authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Mike Snitzer
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dm integrity: use plugging when writing the journal 



When copying data from the journal to the appropriate place, we submit
many IOs.  Some of these IOs could go to adjacent areas.  Use on-stack
plugging so that adjacent IOs get merged during submission.

Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 9dd59727

drivers/md/dm-integrity.c

+5 −0
Original line number Original line Diff line number Diff line
@@ -1823,6 +1823,9 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start, 
{

{

	unsigned i, j, n;

	unsigned i, j, n;

	struct journal_completion comp;

	struct journal_completion comp;

	struct blk_plug plug;



	blk_start_plug(&plug);





	comp.ic = ic;

	comp.ic = ic;

	comp.in_flight = (atomic_t)ATOMIC_INIT(1);

	comp.in_flight = (atomic_t)ATOMIC_INIT(1);
@@ -1947,6 +1950,8 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start, 




	dm_bufio_write_dirty_buffers_async(ic->bufio);

	dm_bufio_write_dirty_buffers_async(ic->bufio);





	blk_finish_plug(&plug);



	complete_journal_op(&comp);

	complete_journal_op(&comp);

	wait_for_completion_io(&comp.comp);

	wait_for_completion_io(&comp.comp);