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authorChristoph Hellwig <hch@infradead.org>2011-08-23 08:50:29 -0400
committerJens Axboe <jaxboe@fusionio.com>2011-08-23 08:50:29 -0400
commit65299a3b788bd274bed92f9fa3232082c9f3ea70 (patch)
tree191c0afe31c15ac4c1bab96e0a07fddb097d0de8 /drivers
parent5dc06c5a70b79a323152bec7e55783e705767e63 (diff)
block: separate priority boosting from REQ_META
Add a new REQ_PRIO to let requests preempt others in the cfq I/O schedule, and lave REQ_META purely for marking requests as metadata in blktrace. All existing callers of REQ_META except for XFS are updated to also set REQ_PRIO for now. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/card/block.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 1ff5486213fb..4c1a648d00fc 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -926,6 +926,9 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
926 /* 926 /*
927 * Reliable writes are used to implement Forced Unit Access and 927 * Reliable writes are used to implement Forced Unit Access and
928 * REQ_META accesses, and are supported only on MMCs. 928 * REQ_META accesses, and are supported only on MMCs.
929 *
930 * XXX: this really needs a good explanation of why REQ_META
931 * is treated special.
929 */ 932 */
930 bool do_rel_wr = ((req->cmd_flags & REQ_FUA) || 933 bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
931 (req->cmd_flags & REQ_META)) && 934 (req->cmd_flags & REQ_META)) &&