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authorJens Axboe <jens.axboe@oracle.com>2010-02-23 08:40:43 +0100
committerJens Axboe <jens.axboe@oracle.com>2010-02-23 08:40:43 +0100
commit79da0644a8e0838522828f106e4049639eea6baf (patch)
tree4dbb8e1a3a4be78a79f14e8ebac5d6fe817a2fb4 /include
parent9f3a6284880ceea452903e2043c88d7226736318 (diff)
downloadop-kernel-dev-79da0644a8e0838522828f106e4049639eea6baf.zip
op-kernel-dev-79da0644a8e0838522828f106e4049639eea6baf.tar.gz
Revert "block: improve queue_should_plug() by looking at IO depths"
This reverts commit fb1e75389bd06fd5987e9cda1b4e0305c782f854. "Benjamin S." <sbenni@gmx.de> reports that the patch in question causes a big drop in sequential throughput for him, dropping from 200MB/sec down to only 70MB/sec. Needs to be investigated more fully, for now lets just revert the offending commit. Conflicts: include/linux/blkdev.h Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/blkdev.h4
1 files changed, 1 insertions, 3 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 5c80189..1896e86 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -461,8 +461,7 @@ struct request_queue
#define QUEUE_FLAG_NONROT 14 /* non-rotational device (SSD) */
#define QUEUE_FLAG_VIRT QUEUE_FLAG_NONROT /* paravirt device */
#define QUEUE_FLAG_IO_STAT 15 /* do IO stats */
-#define QUEUE_FLAG_CQ 16 /* hardware does queuing */
-#define QUEUE_FLAG_DISCARD 17 /* supports DISCARD */
+#define QUEUE_FLAG_DISCARD 16 /* supports DISCARD */
#define QUEUE_FLAG_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \
(1 << QUEUE_FLAG_CLUSTER) | \
@@ -586,7 +585,6 @@ enum {
#define blk_queue_plugged(q) test_bit(QUEUE_FLAG_PLUGGED, &(q)->queue_flags)
#define blk_queue_tagged(q) test_bit(QUEUE_FLAG_QUEUED, &(q)->queue_flags)
-#define blk_queue_queuing(q) test_bit(QUEUE_FLAG_CQ, &(q)->queue_flags)
#define blk_queue_stopped(q) test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags)
#define blk_queue_nomerges(q) test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags)
#define blk_queue_nonrot(q) test_bit(QUEUE_FLAG_NONROT, &(q)->queue_flags)
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