linux.git/drivers/md/dm.c, branch v2.6.25

dm: move deferred bio flushing to workqueue

2008-02-08T02:11:17+00:00

Add a single-thread workqueue for each mapped device
and move flushing of the lists of pushback and deferred bios
to this new workqueue.

Signed-off-by: Milan Broz 
Signed-off-by: Alasdair G Kergon

dm: refactor dm_suspend completion wait

2008-02-08T02:10:30+00:00

Move completion wait to separate function

Signed-off-by: Milan Broz 
Signed-off-by: Alasdair G Kergon

dm: split dm_suspend io_lock hold into two

2008-02-08T02:10:27+00:00

Change io_locking to allow processing flush in separate thread.

Because we have DMF_BLOCK_IO already set, any possible
new ios are queued in dm_requests now.

In the case of interrupting previous wait there can be more
ios queued (we unlocked io_lock for a while) but this is safe.

Signed-off-by: Milan Broz 
Signed-off-by: Alasdair G Kergon

dm: tidy dm_suspend

2008-02-08T02:10:25+00:00

Tidy dm_suspend function

 - change return value logic in dm_suspend
 - use atomic_read only once.
 - move DMF_BLOCK_IO clearing into one place

Signed-off-by: Milan Broz 
Signed-off-by: Alasdair G Kergon

dm: refactor deferred bio_list processing

2008-02-08T02:10:22+00:00

Refactor deferred bio_list processing.

 - use separate _merge_pushback_list function
 - move deferred bio list pick up to flush function
 - use bio_list_pop instead of bio_list_get
 - simplify noflush flag use

No real functional change in this patch.

Signed-off-by: Milan Broz 
Signed-off-by: Alasdair G Kergon

dm: tidy alloc_dev labels

2008-02-08T02:10:19+00:00

Tidy labels in alloc_dev to make later patches more clear.

No functional change in this patch.

Signed-off-by: Milan Broz 
Signed-off-by: Alasdair G Kergon

dm: convert suspend_lock semaphore to mutex

2008-02-08T02:10:08+00:00

Replace semaphore with mutex.

Signed-off-by: Daniel Walker 
Signed-off-by: Alasdair G Kergon

dm: mark function lists static

2008-02-08T02:09:51+00:00

Add a couple of statics.

Signed-off-by: Alasdair G Kergon

dm: add missing memory barrier to dm_suspend

2008-02-08T02:09:49+00:00

Add memory barrier to fix atomic_read of pending value.

Signed-off-by: Milan Broz 
Signed-off-by: Alasdair G Kergon

Driver core: convert block from raw kobjects to core devices

2008-01-25T04:40:36+00:00

This moves the block devices to /sys/class/block. It will create a
flat list of all block devices, with the disks and partitions in one
directory. For compatibility /sys/block is created and contains symlinks
to the disks.

  /sys/class/block
  |-- sda -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda
  |-- sda1 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1
  |-- sda10 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda10
  |-- sda5 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5
  |-- sda6 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda6
  |-- sda7 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda7
  |-- sda8 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda8
  |-- sda9 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda9
  `-- sr0 -> ../../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0

  /sys/block/
  |-- sda -> ../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda
  `-- sr0 -> ../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0

Signed-off-by: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman