[PATCH] Allow file systems to differentiate between data and meta reads

We can use this information for making more intelligent priority
decisions, and it will also be useful for blktrace.

Signed-off-by: Jens Axboe <axboe@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index e3980ec747c1..57992ae511c2 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -2884,6 +2884,8 @@ static void init_request_from_bio(struct request *req, struct bio *bio)
 
         if (bio_sync(bio))
                 req->cmd_flags |= REQ_RW_SYNC;
+        if (bio_rw_meta(bio))
+                req->cmd_flags |= REQ_RW_META;
 
         req->errors = 0;
         req->hard_sector = req->sector = bio->bi_sector;