diff options
| author | Ingo Molnar <mingo@elte.hu> | 2010-02-26 09:18:32 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-02-26 09:18:32 +0100 |
| commit | 64b9fb5704a479d98a59f2a1d45d3331a8f847f8 (patch) | |
| tree | 2b1052b05fa7615c817894bc9802bc5bb2af7ac1 /drivers/md/dm.c | |
| parent | 83f0d53993b2967e54186468b0fc4321447f68f1 (diff) | |
| parent | 60b341b778cc2929df16c0a504c91621b3c6a4ad (diff) | |
Merge commit 'v2.6.33' into tracing/core
Conflicts:
scripts/recordmcount.pl
Merge reason: Merge up to v2.6.33.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 3167480b532..aa4e2aa86d4 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1595,10 +1595,15 @@ static int dm_prep_fn(struct request_queue *q, struct request *rq) return BLKPREP_OK; } -static void map_request(struct dm_target *ti, struct request *clone, - struct mapped_device *md) +/* + * Returns: + * 0 : the request has been processed (not requeued) + * !0 : the request has been requeued + */ +static int map_request(struct dm_target *ti, struct request *clone, + struct mapped_device *md) { - int r; + int r, requeued = 0; struct dm_rq_target_io *tio = clone->end_io_data; /* @@ -1625,6 +1630,7 @@ static void map_request(struct dm_target *ti, struct request *clone, case DM_MAPIO_REQUEUE: /* The target wants to requeue the I/O */ dm_requeue_unmapped_request(clone); + requeued = 1; break; default: if (r > 0) { @@ -1636,6 +1642,8 @@ static void map_request(struct dm_target *ti, struct request *clone, dm_kill_unmapped_request(clone, r); break; } + + return requeued; } /* @@ -1677,12 +1685,17 @@ static void dm_request_fn(struct request_queue *q) atomic_inc(&md->pending[rq_data_dir(clone)]); spin_unlock(q->queue_lock); - map_request(ti, clone, md); + if (map_request(ti, clone, md)) + goto requeued; + spin_lock_irq(q->queue_lock); } goto out; +requeued: + spin_lock_irq(q->queue_lock); + plug_and_out: if (!elv_queue_empty(q)) /* Some requests still remain, retry later */ |