From 615ec946abd9080224b1a5c1f80a575c8dc043f7 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 5 Apr 2017 19:21:06 +0200 Subject: [PATCH] dm kcopyd: switch to use REQ_OP_WRITE_ZEROES It seems like the code currently passes whatever it was using for writes to WRITE SAME. Just switch it to WRITE ZEROES, although that doesn't need any payload. Untested, and confused by the code, maybe someone who understands it better than me can help.. Signed-off-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Signed-off-by: Jens Axboe --- drivers/md/dm-kcopyd.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c index 9e9d04cb..f858467 100644 --- a/drivers/md/dm-kcopyd.c +++ b/drivers/md/dm-kcopyd.c @@ -733,11 +733,11 @@ int dm_kcopyd_copy(struct dm_kcopyd_client *kc, struct dm_io_region *from, job->pages = &zero_page_list; /* - * Use WRITE SAME to optimize zeroing if all dests support it. + * Use WRITE ZEROES to optimize zeroing if all dests support it. */ - job->rw = REQ_OP_WRITE_SAME; + job->rw = REQ_OP_WRITE_ZEROES; for (i = 0; i < job->num_dests; i++) - if (!bdev_write_same(job->dests[i].bdev)) { + if (!bdev_write_zeroes_sectors(job->dests[i].bdev)) { job->rw = WRITE; break; } -- 2.7.4