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Revert "block: fix accounting bug on cross partition merges"

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This reverts commit 7681bfeecc.

Conflicts:

	include/linux/genhd.h

It has numerous issues with the cleanup path and non-elevator
devices. Revert it for now so we can come up with a clean
version without rushing things.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Jens Axboe
2010-10-24 22:06:02 +02:00
parent 35da7a307c
commit f253b86b4a
8 changed files with 13 additions and 47 deletions
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block/blk-core.c
+8 -16
View File
@@ -64,15 +64,13 @@ static void drive_stat_acct(struct request *rq, int new_io)
return;
cpu = part_stat_lock();
part = disk_map_sector_rcu(rq->rq_disk, blk_rq_pos(rq));
if (!new_io) {
part = rq->part;
if (!new_io)
part_stat_inc(cpu, part, merges[rw]);
} else {
part = disk_map_sector_rcu(rq->rq_disk, blk_rq_pos(rq));
else {
part_round_stats(cpu, part);
part_inc_in_flight(part, rw);
rq->part = part;
}
part_stat_unlock();
@@ -130,7 +128,6 @@ void blk_rq_init(struct request_queue *q, struct request *rq)
rq->ref_count = 1;
rq->start_time = jiffies;
set_start_time_ns(rq);
rq->part = NULL;
}
EXPORT_SYMBOL(blk_rq_init);
@@ -805,16 +802,11 @@ static struct request *get_request(struct request_queue *q, int rw_flags,
rl->starved[is_sync] = 0;
priv = !test_bit(QUEUE_FLAG_ELVSWITCH, &q->queue_flags);
if (priv) {
if (priv)
rl->elvpriv++;
/*
* Don't do stats for non-priv requests
*/
if (blk_queue_io_stat(q))
rw_flags |= REQ_IO_STAT;
}
if (blk_queue_io_stat(q))
rw_flags |= REQ_IO_STAT;
spin_unlock_irq(q->queue_lock);
rq = blk_alloc_request(q, rw_flags, priv, gfp_mask);
@@ -1791,7 +1783,7 @@ static void blk_account_io_completion(struct request *req, unsigned int bytes)
int cpu;
cpu = part_stat_lock();
part = req->part;
part = disk_map_sector_rcu(req->rq_disk, blk_rq_pos(req));
part_stat_add(cpu, part, sectors[rw], bytes >> 9);
part_stat_unlock();
}
@@ -1811,7 +1803,7 @@ static void blk_account_io_done(struct request *req)
int cpu;
cpu = part_stat_lock();
part = req->part;
part = disk_map_sector_rcu(req->rq_disk, blk_rq_pos(req));
part_stat_inc(cpu, part, ios[rw]);
part_stat_add(cpu, part, ticks[rw], duration);