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authorLinus Torvalds <torvalds@linux-foundation.org>2010-10-25 07:45:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-25 07:45:10 -0700
commit8e775167d54e6521e7cdbc03ee7ec42a8c67b49a (patch)
treea49914306fb28505c6e21a456df8bdc40d6eac23 /block/blk-core.c
parent4b37ba90f49d4157ac5628f8d730d3505f176724 (diff)
parentf253b86b4ad1b3220544e75880510fd455ebd23f (diff)
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: Revert "block: fix accounting bug on cross partition merges"
Diffstat (limited to 'block/blk-core.c')
-rw-r--r--block/blk-core.c24
1 files changed, 8 insertions, 16 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 881fe44ec7d..f0834e2f572 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -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);