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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-24 10:16:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-24 10:16:26 -0700
commit6c5103890057b1bb781b26b7aae38d33e4c517d8 (patch)
treee6e57961dcddcb5841acb34956e70b9dc696a880 /drivers/block/drbd
parent3dab04e6978e358ad2307bca563fabd6c5d2c58b (diff)
parent9d2e157d970a73b3f270b631828e03eb452d525e (diff)
Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block
* 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block: (65 commits) Documentation/iostats.txt: bit-size reference etc. cfq-iosched: removing unnecessary think time checking cfq-iosched: Don't clear queue stats when preempt. blk-throttle: Reset group slice when limits are changed blk-cgroup: Only give unaccounted_time under debug cfq-iosched: Don't set active queue in preempt block: fix non-atomic access to genhd inflight structures block: attempt to merge with existing requests on plug flush block: NULL dereference on error path in __blkdev_get() cfq-iosched: Don't update group weights when on service tree fs: assign sb->s_bdi to default_backing_dev_info if the bdi is going away block: Require subsystems to explicitly allocate bio_set integrity mempool jbd2: finish conversion from WRITE_SYNC_PLUG to WRITE_SYNC and explicit plugging jbd: finish conversion from WRITE_SYNC_PLUG to WRITE_SYNC and explicit plugging fs: make fsync_buffers_list() plug mm: make generic_writepages() use plugging blk-cgroup: Add unaccounted time to timeslice_used. block: fixup plugging stubs for !CONFIG_BLOCK block: remove obsolete comments for blkdev_issue_zeroout. blktrace: Use rq->cmd_flags directly in blk_add_trace_rq. ... Fix up conflicts in fs/{aio.c,super.c}
Diffstat (limited to 'drivers/block/drbd')
-rw-r--r--drivers/block/drbd/drbd_actlog.c4
-rw-r--r--drivers/block/drbd/drbd_bitmap.c1
-rw-r--r--drivers/block/drbd/drbd_int.h16
-rw-r--r--drivers/block/drbd/drbd_main.c36
-rw-r--r--drivers/block/drbd/drbd_receiver.c29
-rw-r--r--drivers/block/drbd/drbd_req.c4
-rw-r--r--drivers/block/drbd/drbd_worker.c1
-rw-r--r--drivers/block/drbd/drbd_wrappers.h18
8 files changed, 6 insertions, 103 deletions
diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c
index ba95cba192be..aca302492ff2 100644
--- a/drivers/block/drbd/drbd_actlog.c
+++ b/drivers/block/drbd/drbd_actlog.c
@@ -80,7 +80,7 @@ static int _drbd_md_sync_page_io(struct drbd_conf *mdev,
if ((rw & WRITE) && !test_bit(MD_NO_FUA, &mdev->flags))
rw |= REQ_FUA;
- rw |= REQ_UNPLUG | REQ_SYNC;
+ rw |= REQ_SYNC;
bio = bio_alloc(GFP_NOIO, 1);
bio->bi_bdev = bdev->md_bdev;
@@ -689,8 +689,6 @@ void drbd_al_to_on_disk_bm(struct drbd_conf *mdev)
}
}
- drbd_blk_run_queue(bdev_get_queue(mdev->ldev->md_bdev));
-
/* always (try to) flush bitmap to stable storage */
drbd_md_flush(mdev);
diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index fd42832f785b..0645ca829a94 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -840,7 +840,6 @@ static int bm_rw(struct drbd_conf *mdev, int rw) __must_hold(local)
for (i = 0; i < num_pages; i++)
bm_page_io_async(mdev, b, i, rw);
- drbd_blk_run_queue(bdev_get_queue(mdev->ldev->md_bdev));
wait_event(b->bm_io_wait, atomic_read(&b->bm_async_io) == 0);
if (test_bit(BM_MD_IO_ERROR, &b->bm_flags)) {
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 3803a0348937..b0bd27dfc1e8 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -377,7 +377,7 @@ union p_header {
#define DP_HARDBARRIER 1 /* depricated */
#define DP_RW_SYNC 2 /* equals REQ_SYNC */
#define DP_MAY_SET_IN_SYNC 4
-#define DP_UNPLUG 8 /* equals REQ_UNPLUG */
+#define DP_UNPLUG 8 /* not used anymore */
#define DP_FUA 16 /* equals REQ_FUA */
#define DP_FLUSH 32 /* equals REQ_FLUSH */
#define DP_DISCARD 64 /* equals REQ_DISCARD */
@@ -2382,20 +2382,6 @@ static inline int drbd_queue_order_type(struct drbd_conf *mdev)
return QUEUE_ORDERED_NONE;
}
-static inline void drbd_blk_run_queue(struct request_queue *q)
-{
- if (q && q->unplug_fn)
- q->unplug_fn(q);
-}
-
-static inline void drbd_kick_lo(struct drbd_conf *mdev)
-{
- if (get_ldev(mdev)) {
- drbd_blk_run_queue(bdev_get_queue(mdev->ldev->backing_bdev));
- put_ldev(mdev);
- }
-}
-
static inline void drbd_md_flush(struct drbd_conf *mdev)
{
int r;
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 29cd0dc9fe4f..8a43ce0edeed 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2477,12 +2477,11 @@ static u32 bio_flags_to_wire(struct drbd_conf *mdev, unsigned long bi_rw)
{
if (mdev->agreed_pro_version >= 95)
return (bi_rw & REQ_SYNC ? DP_RW_SYNC : 0) |
- (bi_rw & REQ_UNPLUG ? DP_UNPLUG : 0) |
(bi_rw & REQ_FUA ? DP_FUA : 0) |
(bi_rw & REQ_FLUSH ? DP_FLUSH : 0) |
(bi_rw & REQ_DISCARD ? DP_DISCARD : 0);
else
- return bi_rw & (REQ_SYNC | REQ_UNPLUG) ? DP_RW_SYNC : 0;
+ return bi_rw & REQ_SYNC ? DP_RW_SYNC : 0;
}
/* Used to send write requests
@@ -2719,35 +2718,6 @@ static int drbd_release(struct gendisk *gd, fmode_t mode)
return 0;
}
-static void drbd_unplug_fn(struct request_queue *q)
-{
- struct drbd_conf *mdev = q->queuedata;
-
- /* unplug FIRST */
- spin_lock_irq(q->queue_lock);
- blk_remove_plug(q);
- spin_unlock_irq(q->queue_lock);
-
- /* only if connected */
- spin_lock_irq(&mdev->req_lock);
- if (mdev->state.pdsk >= D_INCONSISTENT && mdev->state.conn >= C_CONNECTED) {
- D_ASSERT(mdev->state.role == R_PRIMARY);
- if (test_and_clear_bit(UNPLUG_REMOTE, &mdev->flags)) {
- /* add to the data.work queue,
- * unless already queued.
- * XXX this might be a good addition to drbd_queue_work
- * anyways, to detect "double queuing" ... */
- if (list_empty(&mdev->unplug_work.list))
- drbd_queue_work(&mdev->data.work,
- &mdev->unplug_work);
- }
- }
- spin_unlock_irq(&mdev->req_lock);
-
- if (mdev->state.disk >= D_INCONSISTENT)
- drbd_kick_lo(mdev);
-}
-
static void drbd_set_defaults(struct drbd_conf *mdev)
{
/* This way we get a compile error when sync_conf grows,
@@ -3222,9 +3192,7 @@ struct drbd_conf *drbd_new_device(unsigned int minor)
blk_queue_max_segment_size(q, DRBD_MAX_SEGMENT_SIZE);
blk_queue_bounce_limit(q, BLK_BOUNCE_ANY);
blk_queue_merge_bvec(q, drbd_merge_bvec);
- q->queue_lock = &mdev->req_lock; /* needed since we use */
- /* plugging on a queue, that actually has no requests! */
- q->unplug_fn = drbd_unplug_fn;
+ q->queue_lock = &mdev->req_lock;
mdev->md_io_page = alloc_page(GFP_KERNEL);
if (!mdev->md_io_page)
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 24487d4fb202..8e68be939deb 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -187,15 +187,6 @@ static struct page *drbd_pp_first_pages_or_try_alloc(struct drbd_conf *mdev, int
return NULL;
}
-/* kick lower level device, if we have more than (arbitrary number)
- * reference counts on it, which typically are locally submitted io
- * requests. don't use unacked_cnt, so we speed up proto A and B, too. */
-static void maybe_kick_lo(struct drbd_conf *mdev)
-{
- if (atomic_read(&mdev->local_cnt) >= mdev->net_conf->unplug_watermark)
- drbd_kick_lo(mdev);
-}
-
static void reclaim_net_ee(struct drbd_conf *mdev, struct list_head *to_be_freed)
{
struct drbd_epoch_entry *e;
@@ -219,7 +210,6 @@ static void drbd_kick_lo_and_reclaim_net(struct drbd_conf *mdev)
LIST_HEAD(reclaimed);
struct drbd_epoch_entry *e, *t;
- maybe_kick_lo(mdev);
spin_lock_irq(&mdev->req_lock);
reclaim_net_ee(mdev, &reclaimed);
spin_unlock_irq(&mdev->req_lock);
@@ -436,8 +426,7 @@ void _drbd_wait_ee_list_empty(struct drbd_conf *mdev, struct list_head *head)
while (!list_empty(head)) {
prepare_to_wait(&mdev->ee_wait, &wait, TASK_UNINTERRUPTIBLE);
spin_unlock_irq(&mdev->req_lock);
- drbd_kick_lo(mdev);
- schedule();
+ io_schedule();
finish_wait(&mdev->ee_wait, &wait);
spin_lock_irq(&mdev->req_lock);
}
@@ -1111,8 +1100,6 @@ next_bio:
/* > e->sector, unless this is the first bio */
bio->bi_sector = sector;
bio->bi_bdev = mdev->ldev->backing_bdev;
- /* we special case some flags in the multi-bio case, see below
- * (REQ_UNPLUG) */
bio->bi_rw = rw;
bio->bi_private = e;
bio->bi_end_io = drbd_endio_sec;
@@ -1141,13 +1128,8 @@ next_bio:
bios = bios->bi_next;
bio->bi_next = NULL;
- /* strip off REQ_UNPLUG unless it is the last bio */
- if (bios)
- bio->bi_rw &= ~REQ_UNPLUG;
-
drbd_generic_make_request(mdev, fault_type, bio);
} while (bios);
- maybe_kick_lo(mdev);
return 0;
fail:
@@ -1167,9 +1149,6 @@ static int receive_Barrier(struct drbd_conf *mdev, enum drbd_packets cmd, unsign
inc_unacked(mdev);
- if (mdev->net_conf->wire_protocol != DRBD_PROT_C)
- drbd_kick_lo(mdev);
-
mdev->current_epoch->barrier_nr = p->barrier;
rv = drbd_may_finish_epoch(mdev, mdev->current_epoch, EV_GOT_BARRIER_NR);
@@ -1636,12 +1615,11 @@ static unsigned long write_flags_to_bio(struct drbd_conf *mdev, u32 dpf)
{
if (mdev->agreed_pro_version >= 95)
return (dpf & DP_RW_SYNC ? REQ_SYNC : 0) |
- (dpf & DP_UNPLUG ? REQ_UNPLUG : 0) |
(dpf & DP_FUA ? REQ_FUA : 0) |
(dpf & DP_FLUSH ? REQ_FUA : 0) |
(dpf & DP_DISCARD ? REQ_DISCARD : 0);
else
- return dpf & DP_RW_SYNC ? (REQ_SYNC | REQ_UNPLUG) : 0;
+ return dpf & DP_RW_SYNC ? REQ_SYNC : 0;
}
/* mirrored write */
@@ -3556,9 +3534,6 @@ static int receive_skip(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
static int receive_UnplugRemote(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned int data_size)
{
- if (mdev->state.disk >= D_INCONSISTENT)
- drbd_kick_lo(mdev);
-
/* Make sure we've acked all the TCP data associated
* with the data requests being unplugged */
drbd_tcp_quickack(mdev->data.socket);
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 11a75d32a2e2..ad3fc6228f27 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -960,10 +960,6 @@ allocate_barrier:
bio_endio(req->private_bio, -EIO);
}
- /* we need to plug ALWAYS since we possibly need to kick lo_dev.
- * we plug after submit, so we won't miss an unplug event */
- drbd_plug_device(mdev);
-
return 0;
fail_conflicting:
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 34f224b018b3..e027446590d3 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -792,7 +792,6 @@ int drbd_resync_finished(struct drbd_conf *mdev)
* queue (or even the read operations for those packets
* is not finished by now). Retry in 100ms. */
- drbd_kick_lo(mdev);
__set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ / 10);
w = kmalloc(sizeof(struct drbd_work), GFP_ATOMIC);
diff --git a/drivers/block/drbd/drbd_wrappers.h b/drivers/block/drbd/drbd_wrappers.h
index defdb5013ea3..53586fa5ae1b 100644
--- a/drivers/block/drbd/drbd_wrappers.h
+++ b/drivers/block/drbd/drbd_wrappers.h
@@ -45,24 +45,6 @@ static inline void drbd_generic_make_request(struct drbd_conf *mdev,
generic_make_request(bio);
}
-static inline void drbd_plug_device(struct drbd_conf *mdev)
-{
- struct request_queue *q;
- q = bdev_get_queue(mdev->this_bdev);
-
- spin_lock_irq(q->queue_lock);
-
-/* XXX the check on !blk_queue_plugged is redundant,
- * implicitly checked in blk_plug_device */
-
- if (!blk_queue_plugged(q)) {
- blk_plug_device(q);
- del_timer(&q->unplug_timer);
- /* unplugging should not happen automatically... */
- }
- spin_unlock_irq(q->queue_lock);
-}
-
static inline int drbd_crypto_is_hash(struct crypto_tfm *tfm)
{
return (crypto_tfm_alg_type(tfm) & CRYPTO_ALG_TYPE_HASH_MASK)