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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>
This commit is contained in:
Jens Axboe 2007-01-19 11:30:16 +11:00 committed by Jens Axboe
parent 783660b2f6
commit aaf1228ddf
2 changed files with 2 additions and 18 deletions
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19
block/cfq-iosched.c
View File

@ -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) {

1
include/linux/blkdev.h
View File

@ -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;