linux-toradex.git/drivers/block/drbd, branch tegra

drivers/block/drbd/drbd_nl.c: use bitmap_parse instead of __bitmap_parse

2011-08-02T10:43:49+00:00

The buffer 'sc.cpu_mask' is a kernel buffer.  If bitmap_parse is used
instead of __bitmap_parse the extra parameter that indicates a kernel
buffer is not needed.

Signed-off-by: H Hartley Sweeten 
Cc: Lars Ellenberg 
Cc: Philipp Reisner 
Cc: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Jens Axboe

Merge branch 'for-3.0-important' of git://git.drbd.org/linux-2.6-drbd into for-linus

2011-06-30T08:10:50+00:00

drbd: we should write meta data updates with FLUSH FUA

2011-06-30T07:23:46+00:00

We used to write these with BIO_RW_BARRIER aka REQ_HARDBARRIER (unless
disabled in the configuration). The correct semantic now would be to
write with FLUSH/FUA.
For example, with activity log transactions, FUA alone is not enough, we
need the corresponding bitmap update (and all related application
updates) on stable storage as well.

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: when receive times out on meta socket, also check last receive time on data socket

2011-06-30T07:23:44+00:00

If we have an asymetrically congested network, we may send P_PING,
but due to congestion, the corresponding P_PING_ACK would time out,
and we would drop a (congested, but otherwise) healthy connection
("PingAck did not arrive in time.")

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: account bitmap IO during resync as resync-(related-)-io

2011-06-30T07:23:43+00:00

If we have a good resync rate, we will frequently update the on-disk
bitmap, which, if not accounted for as resync io, may let an otherwise
idle device appear to be "busy", and cause us to throttle resync.

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: don't cond_resched_lock with IRQs disabled

2011-06-30T07:23:42+00:00

The last commit, drbd: add missing spinlock to bitmap receive,
introduced a cond_resched_lock(), where the lock in question is taken
with irqs disabled.

As we must not schedule with IRQs disabled,
and cond_resched_lock_irq() does not exist, yet,
we re-aquire the spin_lock_irq() for each bitmap page processed in turn.

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: add missing spinlock to bitmap receive

2011-06-30T07:23:41+00:00

During bitmap exchange, when using the RLE bitmap compression scheme,
we have a code path that can set the whole bitmap at once.

To avoid holding spin_lock_irq() for too long, we used to lock out other
bitmap modifications during bitmap exchange by other means, and then,
knowing we have exclusive access to the bitmap, modify it without
the spinlock, and with IRQs enabled.

Since we now allow local IO to continue, potentially setting additional
bits during the bitmap receive phase, this is no longer true, and we get
uncoordinated updates of bitmap members, causing bm_set to no longer
accurately reflect the total number of set bits.

To actually see this, you'd need to have a large bitmap, use RLE bitmap
compression, and have busy IO during sync handshake and bitmap exchange.

Fix this by taking the spin_lock_irq() in this code path as well, but
calling cond_resched_lock() after each page worth of bits processed.

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: Use the correct max_bio_size when creating resync requests

2011-06-30T07:23:40+00:00

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

Merge branch 'for-2.6.40/drivers' of git://git.kernel.dk/linux-2.6-block

2011-05-25T16:15:35+00:00

* 'for-2.6.40/drivers' of git://git.kernel.dk/linux-2.6-block: (110 commits)
  loop: handle on-demand devices correctly
  loop: limit 'max_part' module param to DISK_MAX_PARTS
  drbd: fix warning
  drbd: fix warning
  drbd: Fix spelling
  drbd: fix schedule in atomic
  drbd: Take a more conservative approach when deciding max_bio_size
  drbd: Fixed state transitions after async outdate-peer-handler returned
  drbd: Disallow the peer_disk_state to be D_OUTDATED while connected
  drbd: Fix for the connection problems on high latency links
  drbd: fix potential activity log refcount imbalance in error path
  drbd: Only downgrade the disk state in case of disk failures
  drbd: fix disconnect/reconnect loop, if ping-timeout == ping-int
  drbd: fix potential distributed deadlock
  lru_cache.h: fix comments referring to ts_ instead of lc_
  drbd: Fix for application IO with the on-io-error=pass-on policy
  xen/p2m: Add EXPORT_SYMBOL_GPL to the M2P override functions.
  xen/p2m/m2p/gnttab: Support GNTMAP_host_map in the M2P override.
  xen/blkback: don't fail empty barrier requests
  xen/blkback: fix xenbus_transaction_start() hang caused by double xenbus_transaction_end()
  ...

drbd: fix warning

2011-05-24T08:38:33+00:00

In file included from drivers/block/drbd/drbd_main.c:54:                        drivers/block/drbd/drbd_int.h:1190: warning: parameter has incomplete type

Forward declarations of enums do not work.

Fix it unpleasantly by moving the prototype.

Cc: Jens Axboe 
Signed-off-by: Lars Ellenberg 
Signed-off-by: Philipp Reisner 
Signed-off-by: Andrew Morton