---

yaml --- r: 182933 b: refs/heads/master c: 41647e7 h: refs/heads/master i: 182931: b10e504 v: v3
git-mirror · Feb 28, 2010 · bdd4e35 · bdd4e35
1 parent 0a20e4f
commit bdd4e35
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Showing 2 changed files with 7 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3dde36ddea3e07dd025c4c1ba47edec91606fec0
+refs/heads/master: 41647e7a91338dba21773a16af7474ef95e0929e
diff --git a/trunk/block/cfq-iosched.c b/trunk/block/cfq-iosched.c
@@ -47,6 +47,7 @@ static const int cfq_hist_divisor = 4;
 #define CFQ_SERVICE_SHIFT       12
 
 #define CFQQ_SEEK_THR		(sector_t)(8 * 100)
+#define CFQQ_SECT_THR_NONROT	(sector_t)(2 * 32)
 #define CFQQ_SEEKY(cfqq)	(hweight32(cfqq->seek_history) > 32/8)
 
 #define RQ_CIC(rq)		\
@@ -2965,6 +2966,7 @@ cfq_update_io_seektime(struct cfq_data *cfqd, struct cfq_queue *cfqq,
 		       struct request *rq)
 {
 	sector_t sdist = 0;
+	sector_t n_sec = blk_rq_sectors(rq);
 	if (cfqq->last_request_pos) {
 		if (cfqq->last_request_pos < blk_rq_pos(rq))
 			sdist = blk_rq_pos(rq) - cfqq->last_request_pos;
@@ -2973,7 +2975,10 @@ cfq_update_io_seektime(struct cfq_data *cfqd, struct cfq_queue *cfqq,
 	}
 
 	cfqq->seek_history <<= 1;
-	cfqq->seek_history |= (sdist > CFQQ_SEEK_THR);
+	if (blk_queue_nonrot(cfqd->queue))
+		cfqq->seek_history |= (n_sec < CFQQ_SECT_THR_NONROT);
+	else
+		cfqq->seek_history |= (sdist > CFQQ_SEEK_THR);
 }
 
 /*