From aaf1228ddfb44f04c87d1e7dfc5ccffdba74363d Mon Sep 17 00:00:00 2001
From: Jens Axboe <jens.axboe@oracle.com>
Date: Fri, 19 Jan 2007 11:30:16 +1100
Subject: [PATCH] cfq-iosched: remove cfq_io_context last_queue
It hasn't been used for a while, kill it off and remove the old
if 0 code chunk.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---
block/cfq-iosched.c | 19 ++-----------------
include/linux/blkdev.h | 1 -
2 files changed, 2 insertions(+), 18 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 07b706243772..a31066d6c20c 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1471,22 +1471,8 @@ err:
static void
cfq_update_io_thinktime(struct cfq_data *cfqd, struct cfq_io_context *cic)
{
- unsigned long elapsed, ttime;
-
- /*
- * if this context already has stuff queued, thinktime is from
- * last queue not last end
- */
-#if 0
- if (time_after(cic->last_end_request, cic->last_queue))
- elapsed = jiffies - cic->last_end_request;
- else
- elapsed = jiffies - cic->last_queue;
-#else
- elapsed = jiffies - cic->last_end_request;
-#endif
-
- ttime = min(elapsed, 2UL * cfqd->cfq_slice_idle);
+ unsigned long elapsed = jiffies - cic->last_end_request;
+ unsigned long ttime = min(elapsed, 2UL * cfqd->cfq_slice_idle);
cic->ttime_samples = (7*cic->ttime_samples + 256) / 8;
cic->ttime_total = (7*cic->ttime_total + 256*ttime) / 8;
@@ -1649,7 +1635,6 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq,
cfq_update_io_seektime(cic, rq);
cfq_update_idle_window(cfqd, cfqq, cic);
- cic->last_queue = jiffies;
cic->last_request_pos = rq->sector + rq->nr_sectors;
if (cfqq == cfqd->active_queue) {
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 36a6eacefe20..83dcd8c0e974 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -82,7 +82,6 @@ struct cfq_io_context {
unsigned long last_end_request;
sector_t last_request_pos;
- unsigned long last_queue;
unsigned long ttime_total;
unsigned long ttime_samples;
--
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