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| author | Christoph Hellwig <hch@infradead.org> | 2011-08-23 14:50:29 +0200 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-08-23 14:50:29 +0200 |
| commit | 65299a3b788bd274bed92f9fa3232082c9f3ea70 (patch) | |
| tree | 191c0afe31c15ac4c1bab96e0a07fddb097d0de8 /drivers/mmc/card/block.c | |
| parent | 5dc06c5a70b79a323152bec7e55783e705767e63 (diff) | |
| download | linux-3.10-65299a3b788bd274bed92f9fa3232082c9f3ea70.tar.gz linux-3.10-65299a3b788bd274bed92f9fa3232082c9f3ea70.tar.bz2 linux-3.10-65299a3b788bd274bed92f9fa3232082c9f3ea70.zip | |
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/mmc/card/block.c')
| -rw-r--r-- | drivers/mmc/card/block.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 1ff5486213f..4c1a648d00f 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, /* * Reliable writes are used to implement Forced Unit Access and * REQ_META accesses, and are supported only on MMCs. + * + * XXX: this really needs a good explanation of why REQ_META + * is treated special. */ bool do_rel_wr = ((req->cmd_flags & REQ_FUA) || (req->cmd_flags & REQ_META)) && |