From 1e3b21c6fb671a5ce9d77a05a8bde805d8908467 Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Sun, 30 Apr 2017 17:31:22 -0400 Subject: dm integrity: optimize writing dm-bufio buffers that are partially changed Rather than write the entire dm-bufio buffer when only a subset is changed, improve dm-bufio (and dm-integrity) by only writing the subset of the buffer that changed. Update dm-integrity to make use of dm-bufio's new dm_bufio_mark_partial_buffer_dirty() interface. Signed-off-by: Mikulas Patocka Signed-off-by: Mike Snitzer --- drivers/md/dm-integrity.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/md/dm-integrity.c') diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c index 3acce09bba35..689f89d8eeef 100644 --- a/drivers/md/dm-integrity.c +++ b/drivers/md/dm-integrity.c @@ -1040,7 +1040,7 @@ static int dm_integrity_rw_tag(struct dm_integrity_c *ic, unsigned char *tag, se memcpy(tag, dp, to_copy); } else if (op == TAG_WRITE) { memcpy(dp, tag, to_copy); - dm_bufio_mark_buffer_dirty(b); + dm_bufio_mark_partial_buffer_dirty(b, *metadata_offset, *metadata_offset + to_copy); } else { /* e.g.: op == TAG_CMP */ if (unlikely(memcmp(dp, tag, to_copy))) { -- cgit v1.2.3-59-g8ed1b