Commit Graph

209819 Commits

Author SHA1 Message Date
Philipp Reisner 8e26f9ccb9 drbd: New sync_param packet, that includes the parameters of the new controller
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 18:38:13 +02:00
Philipp Reisner 9a31d7164d drbd: New sync parameters for the smart resync rate controller
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 18:38:12 +02:00
Lars Ellenberg d28fd092a5 drbd: fix list corruption (recent regression)
The commit 288f422ec1
 drbd: Track all IO requests on the TL, not writes only
moved a list_add_tail(req, ) into a region where req
may have just been freed due to conflict detection.

Fix this by adding a proper cleanup section for that code path.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 18:31:43 +02:00
Philipp Reisner e756414f7d drbd: Initialize all members of sync_conf to their defaults [Bugz 315]
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 15:12:07 +02:00
Philipp Reisner 6709893059 drbd: Make sure tl_restart(, resend) can not get called multiple times for a new connection
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 15:09:09 +02:00
Philipp Reisner f70b351159 drbd: Do not try to free tl_hash in drbd_disconnect() when IO is suspended
We may not free tl_hash when IO is suspended, since we can not wait
until ap_bio_cnt reaches zero.

We can do this after susp reched 0, since then tl_clear was called

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 15:08:27 +02:00
Philipp Reisner 8f488156c0 drbd: Allow attach while IO is suspended
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 15:05:32 +02:00
Philipp Reisner cfa03415a1 drbd: Allow tl_restart() to do IO completion while IO is suspended
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 15:05:08 +02:00
Philipp Reisner 84dfb9f564 drbd: Fixed a deadlock, probably only affected UP machines
After disconnect (most likely mdev->net_cnt == 0) and we are
still in an unstable state (!drbd_state_is_stable()). When we
get an IO request in drbd_get_max_buffers() (called from
__inc_ap_bio_cond(), called from inc_ap_bio()) we wake up
misc_wait. Misc_wait is also used in inc_ap_bio() to sleep
until the outcome of __inc_ap_bio_cond() changes. => Busy loop!

Solution: Have a dedicated wait queue for get_net_conf() and
put_net_conf().

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 15:04:46 +02:00
Philipp Reisner 65d922c33e drbd: Do not do a hard state change when establishing a connection [bugz 304]
Make sure the state engine can deny two primaries to connect

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 15:04:10 +02:00
Philipp Reisner 481c6f5032 drbd: Ensure that the peer was not rebootet in the meantime before resending TL
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 15:01:37 +02:00
Philipp Reisner 43a5182ccc drbd: Delayed creation of current-UUID
When a fencing policy of "resource-and-stonith" is configured,
and DRBD looses connection to it's peer, we can delay the
creation of a new current-UUID until IO gets thawed.

That allows one to deploy fence-peer handlers that actually
commit suicide on the machine they get started.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:59:21 +02:00
Philipp Reisner 87f7be4cf8 drbd: Run the fence-peer helper asynchronously
Since we can not thaw the transfer log, the next logical step is
to allow reconnects while the fence-peer handler runs.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:58:36 +02:00
Philipp Reisner 1616a25493 drbd: Reduce the verbosity of some state transitions
State transitions in the space of non-allowed states used
to be very noisy. Reduce that, since that has little value
for the majority of the user base.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:57:22 +02:00
Philipp Reisner 999122bc18 drbd: Removing a by now obsolete clause in the state sanitizing
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:56:50 +02:00
Philipp Reisner 18a50fa213 drbd: Now we need to handle the ed_uuid of an diskless, unconnected primary correctly
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:56:00 +02:00
Philipp Reisner 894c6a9461 drbd: Disabled the crashed_primary detection for re-attach of last data while IO is frozen
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:55:11 +02:00
Philipp Reisner 47ff2d0a8e drbd: Do not allow a fencing-policy of resource-and-stonith with protocol A
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:53:42 +02:00
Philipp Reisner 265be2d098 drbd: Finished the "on-no-data-accessible suspend-io;" functionality
When no data is accessible (no connection to the peer, nor a local disk)
allow the user to select to freeze all IO operations instead of getting
IO errors.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:52:53 +02:00
Philipp Reisner 905cd7d8ac drbd: Removed redundant error checks in the request code path
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:39:38 +02:00
Philipp Reisner 5ba82308ea drbd: factored drbd_req_make_private_bio() out of drbd_req_new()
Preparing tl_thaw_dio()

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:37:33 +02:00
Philipp Reisner b9b98716f8 drbd: Do not send two barriers without any writes between them
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:36:51 +02:00
Philipp Reisner 11b58e73a3 drbd: factored tl_restart() out of tl_clear().
If IO was frozen for a temporal network outage, resend the
content of the transfer-log into the newly established connection.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:35:58 +02:00
Philipp Reisner 2a80699f80 drbd: mod_req has now a return value
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:26:45 +02:00
Philipp Reisner 288f422ec1 drbd: Track all IO requests on the TL, not writes only
With that the drbd_fail_pending_reads() function becomes obsolete.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:25:20 +02:00
Philipp Reisner 7e602c0aaf drbd: renamed drbd_tl_epoch.n_req to drbd_tl_epoch.n_writes
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 14:23:45 +02:00
Vivek Goyal 504c6d1b44 amiga floppy: Compile failure fixes
o Compile fixes for amiga floppy driver.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-26 12:23:25 +09:00
Vivek Goyal 639e2f2aa7 atari floppy: Stop sharing request queue across multiple gendisks
o Use one request queue per gendisk instead of sharing the queue.

o Don't have hardware. No compile testing or run time testing done. Completely
  untested.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-24 20:35:45 +02:00
Vivek Goyal 786029ff81 amiga floppy: Stop sharing request queue across multiple gendisks
o Use one request queue per gendisk instead of sharing request queue

o Don't have hardware. No compile testing or run time testing done. Completely
  untested.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-24 20:35:44 +02:00
Jens Axboe 488211844e floppy: switch to one queue per drive instead of sharing a queue
Pretty straight forward conversion. Note that we do round-robin
between the drives that have available requests, before we simply
used the drive that the IO scheduler told us to. Since the IO
scheduler doesn't care about multiple devices per queue, the resulting
sort would not have made sense.

Fixed by Vivek to get rid of a double lock problem in set_next_request()

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
2010-09-22 09:32:36 +02:00
Stephen M. Cameron fcfb5c0ce1 cciss: remove some superfluous tests from cciss_bigpassthru()
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:40 +02:00
Stephen M. Cameron 0c9f5ba7cb cciss: factor out cciss_big_passthru
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:39 +02:00
Stephen M. Cameron f32f125b1c cciss: factor out cciss_passthru
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:37 +02:00
Stephen M. Cameron 0894b32c5c cciss: factor out cciss_getluninfo
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:36 +02:00
Stephen M. Cameron c525919ddf cciss: factor out cciss_getdrivver
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:35 +02:00
Stephen M. Cameron 8a4f7fbfdd cciss: factor out cciss_getfirmver
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:34 +02:00
Stephen M. Cameron d18dfad4e2 cciss: factor out cciss_getbustypes
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:33 +02:00
Stephen M. Cameron 93c7493113 cciss: factor out cciss_getheartbeat
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:32 +02:00
Stephen M. Cameron 4f43f32cd3 cciss: factor out cciss_setnodename
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:32 +02:00
Stephen M. Cameron 2521610942 cciss: factor out cciss_getnodename
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:31 +02:00
Stephen M. Cameron 4c800eed9a cciss: factor out cciss_setintinfo
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:30 +02:00
Stephen M. Cameron 576e661c65 cciss: factor out cciss_getintinfo
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:29 +02:00
Stephen M. Cameron 0a25a5aee7 cciss: factor out cciss_getpciinfo
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:12:28 +02:00
Milan Broz ee86273062 loop: add some basic read-only sysfs attributes
Create /sys/block/loopX/loop directory and provide these attributes:
 - backing_file
 - autoclear
 - offset
 - sizelimit

This loop directory is present only if loop device is configured.

To be used in util-linux-ng (and possibly elsewhere like udev rules)
where code need to get loop attributes from kernel (and not store
duplicate info in userspace).

Moreover loop ioctls are not even able to provide full backing
file info because of buffer limits.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-08-23 15:18:10 +02:00
Linus Torvalds 9ee47476d6 Merge branch 'radix-tree' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/xfsdev
* 'radix-tree' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/xfsdev:
  radix-tree: radix_tree_range_tag_if_tagged() can set incorrect tags
  radix-tree: clear all tags in radix_tree_node_rcu_free
2010-08-22 19:55:14 -07:00
Linus Torvalds 76be97c1fc Linux 2.6.36-rc2 2010-08-22 17:43:29 -07:00
Dave Chinner 144dcfc012 radix-tree: radix_tree_range_tag_if_tagged() can set incorrect tags
Commit ebf8aa44be ("radix-tree:
omplement function radix_tree_range_tag_if_tagged") does not safely
set tags on on intermediate tree nodes. The code walks down the tree
setting tags before it has fully resolved the path to the leaf under
the assumption there will be a leaf slot with the tag set in the
range it is searching.

Unfortunately, this is not a valid assumption - we can abort after
setting a tag on an intermediate node if we overrun the number of
tags we are allowed to set in a batch, or stop scanning because we
we have passed the last scan index before we reach a leaf slot with
the tag we are searching for set.

As a result, we can leave the function with tags set on intemediate
nodes which can be tripped over later by tag-based lookups. The
result of these stale tags is that lookup may end prematurely or
livelock because the lookup cannot make progress.

The fix for the problem involves reocrding the traversal path we
take to the leaf nodes, and only propagating the tags back up the
tree once the tag is set in the leaf node slot. We are already
recording the path for efficient traversal, so there is no
additional overhead to do the intermediately node tag setting in
this manner.

This fixes a radix tree lookup livelock triggered by the new
writeback sync livelock avoidance code introduced in commit
f446daaea9 ("mm: implement writeback
livelock avoidance using page tagging").

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Acked-by: Jan Kara <jack@suse.cz>
2010-08-23 10:33:53 +10:00
Dave Chinner b6dd08652e radix-tree: clear all tags in radix_tree_node_rcu_free
Commit f446daaea9 ("mm: implement
writeback livelock avoidance using page tagging") introduced a new
radix tree tag, increasing the number of tags in each node from 2 to
3. It did not, however, fix up the code in
radix_tree_node_rcu_free() that cleans up after radix_tree_shrink()
and hence could leave stray tags set in the new tag array.

The result is that the livelock avoidance code added in the the
above commit would hit stale tags when doing tag based lookups,
resulting in livelocks when trying to traverse the tree.

Fix this problem in radix_tree_node_rcu_free() so it doesn't happen
again in the future by using a loop to walk all the tags up to
RADIX_TREE_MAX_TAGS to clear the stray tags radix_tree_shrink()
leaves behind.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Acked-by: Nick Piggin <npiggin@kernel.dk>
Acked-by: Jan Kara <jack@suse.cz>
2010-08-23 10:33:19 +10:00
Linus Torvalds 3dc8d7f07e Merge branch 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: PIT: free irq source id in handling error path
  KVM: destroy workqueue on kvm_create_pit() failures
  KVM: fix poison overwritten caused by using wrong xstate size
2010-08-22 11:27:36 -07:00
Linus Torvalds 4238a417a9 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel: (58 commits)
  drm/i915,intel_agp: Add support for Sandybridge D0
  drm/i915: fix render pipe control notify on sandybridge
  agp/intel: set 40-bit dma mask on Sandybridge
  drm/i915: Remove the conflicting BUG_ON()
  drm/i915/suspend: s/IS_IRONLAKE/HAS_PCH_SPLIT/
  drm/i915/suspend: Flush register writes before busy-waiting.
  i915: disable DAC on Ironlake also when doing CRT load detection.
  drm/i915: wait for actual vblank, not just 20ms
  drm/i915: make sure eDP PLL is enabled at the right time
  drm/i915: fix VGA plane disable for Ironlake+
  drm/i915: eDP mode set sequence corrections
  drm/i915: add panel reset workaround
  drm/i915: Enable RC6 on Ironlake.
  drm/i915/sdvo: Only set is_lvds if we have a valid fixed mode.
  drm/i915: Set up a render context on Ironlake
  drm/i915 invalidate indirect state pointers at end of ring exec
  drm/i915: Wake-up wait_request() from elapsed hang-check (v2)
  drm/i915: Apply i830 errata for cursor alignment
  drm/i915: Only update i845/i865 CURBASE when disabled (v2)
  drm/i915: FBC is updated within set_base() so remove second call in mode_set()
  ...
2010-08-22 11:03:27 -07:00