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dm integrity: use plugging when writing the journal

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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: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mikulas Patocka 2017-07-19 11:24:08 -04:00 committed by Mike Snitzer
parent 9dd59727db
commit a7c3e62bdc
1 changed files with 5 additions and 0 deletions
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5
drivers/md/dm-integrity.c
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@ -1823,6 +1823,9 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start,
{
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);
@ -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);
blk_finish_plug(&plug);
complete_journal_op(&comp);
wait_for_completion_io(&comp.comp);