* 'stable/xenbus' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xen/xenbus: making backend support modular is too complex
xen/pci: Make xen-pcifront be dependent on XEN_XENBUS_FRONTEND
xen/xenbus: fixup checkpatch issues in xenbus_probe*
xen/netfront: select XEN_XENBUS_FRONTEND
xen/xenbus: clean up noise in xenbus_probe_frontend.c
xen/xenbus: clean up noise in xenbus_probe_backend.c
xen/xenbus: clean up noise in xenbus_probe.c
xen/xenbus: cleanup debug noise in xenbus_comms.c
xen/xenbus: clean up error handling
xen/xenbus: make frontend bus GPL
xen/xenbus: make sure backend bus is registered earlier
xenbus/frontend: register bus earlier
xen: remove xen/evtchn.h
xen: add backend driver support
xen: separate out frontend xenbus
* 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: (33 commits)
usb: don't use flush_scheduled_work()
speedtch: don't abuse struct delayed_work
media/video: don't use flush_scheduled_work()
media/video: explicitly flush request_module work
ioc4: use static work_struct for ioc4_load_modules()
init: don't call flush_scheduled_work() from do_initcalls()
s390: don't use flush_scheduled_work()
rtc: don't use flush_scheduled_work()
mmc: update workqueue usages
mfd: update workqueue usages
dvb: don't use flush_scheduled_work()
leds-wm8350: don't use flush_scheduled_work()
mISDN: don't use flush_scheduled_work()
macintosh/ams: don't use flush_scheduled_work()
vmwgfx: don't use flush_scheduled_work()
tpm: don't use flush_scheduled_work()
sonypi: don't use flush_scheduled_work()
hvsi: don't use flush_scheduled_work()
xen: don't use flush_scheduled_work()
gdrom: don't use flush_scheduled_work()
...
Fixed up trivial conflict in drivers/media/video/bt8xx/bttv-input.c
as per Tejun.
Impact: refactor
Make a distinct frontend xenbus, in preparation for adding a backend xenbus.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
[corresponds to 2fd433a4188f in git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git
with adjustments to reflect changes in the code which is moved]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
flush_scheduled_work() is deprecated and scheduled to be removed.
Directly flush floppy_work instead.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
cciss: fix cciss_revalidate panic
block: max hardware sectors limit wrapper
block: Deprecate QUEUE_FLAG_CLUSTER and use queue_limits instead
blk-throttle: Correct the placement of smp_rmb()
blk-throttle: Trim/adjust slice_end once a bio has been dispatched
block: check for proper length of iov entries earlier in blk_rq_map_user_iov()
drbd: fix for spin_lock_irqsave in endio callback
drbd: don't recvmsg with zero length
If you delete a logical drive, and then run BLKRRPART (e.g. via fdisk)
on a logical drive which is "after" the deleted logical drive in the h->drv[]
array, then cciss_revalidate panics because it will access the null pointer
h->drv[x] when x hits the deleted drive.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
The new interface creates directories per mapped image
and under each it creates a subdir per available snapshot.
This allows keeping a cleaner interface within the sysfs
guidelines. The ABI documentation was updated too.
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
In commit 9b7f76dc37919ea36caa9680a3f765e5b19b25fb,
Author: Lars Ellenberg <lars.ellenberg@linbit.com>
Date: Wed Aug 11 23:40:24 2010 +0200
drbd: new configuration parameter c-min-rate
a bad chunk slipped through, which is now reverted as well,
restoring the correct irqsave for the endio callback.
This patch also add comments at both req_mod()
and in the endio callback so it should not happen again.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This should fix a performance degradation we observed recently.
If we don't expect any subheader, we should not call into the tcp stack,
as that may add considerable latency if there is no data available at
this point.
For a synthetic synchronous write load with single outstanding writes,
this additional latency when processing the "unplug remote" packet
added up to a performance degradation factor >= 10.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
cciss: fix build for PROC_FS disabled
block: fix amiga and atari floppy driver compile warning
blk-throttle: Fix calculation of max number of WRITES to be dispatched
ioprio: grab rcu_read_lock in sys_ioprio_{set,get}()
xen/blkfront: cope with backend that fail empty BLKIF_OP_WRITE_BARRIER requests
xen/blkfront: Implement FUA with BLKIF_OP_WRITE_BARRIER
xen/blkfront: change blk_shadow.request to proper pointer
xen/blkfront: map REQ_FLUSH into a full barrier
The big kernel lock has been removed from all these files at some point,
leaving only the #include.
Remove this too as a cleanup.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The recent patch to fix the removal of a non-existing proc
directory introduced this build problem for !CONFIG_PROC_FS:
drivers/block/cciss.c:4929: error: 'proc_cciss' undeclared (first use in this function)
Fix it by moving proc_cciss outside of the CONFIG_PROC_FS scope.
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Move the mid-layer's ->queuecommand() invocation from being locked
with the host lock to being unlocked to facilitate speeding up the
critical path for drivers who don't need this lock taken anyway.
The patch below presents a simple SCSI host lock push-down as an
equivalent transformation. No locking or other behavior should change
with this patch. All existing bugs and locking orders are preserved.
Additionally, add one parameter to queuecommand,
struct Scsi_Host *
and remove one parameter from queuecommand,
void (*done)(struct scsi_cmnd *)
Scsi_Host* is a convenient pointer that most host drivers need anyway,
and 'done' is redundant to struct scsi_cmnd->scsi_done.
Minimal code disturbance was attempted with this change. Most drivers
needed only two one-line modifications for their host lock push-down.
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Acked-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Geert, my crosstool don't produce warning below. I guess this has to do
something with compiler version.
- Geert noticed following warning during compilation.
drivers/block/amiflop.c:1344: warning: ‘rq’ may be used uninitialized in
this function
drivers/block/ataflop.c:1402: warning: ‘rq’ may be used uninitialized in
this function
- Initialize rq to NULL to fix the warning. If we can't find a suitable request
to dispatch, this function should return NULL instead of a possibly garbage
pointer.
- Cross compile tested only. Don't have hardware to test it.
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: (27 commits)
block: remove unused copy_io_context()
Documentation: remove anticipatory scheduler info
block: remove REQ_HARDBARRIER
ioprio: rcu_read_lock/unlock protect find_task_by_vpid call (V2)
ioprio: fix RCU locking around task dereference
block: ioctl: fix information leak to userland
block: read i_size with i_size_read()
cciss: fix proc warning on attempt to remove non-existant directory
bio: take care not overflow page count when mapping/copying user data
block: limit vec count in bio_kmalloc() and bio_alloc_map_data()
block: take care not to overflow when calculating total iov length
block: check for proper length of iov entries in blk_rq_map_user_iov()
cciss: remove controllers supported by hpsa
cciss: use usleep_range not msleep for small sleeps
cciss: limit commands allocated on reset_devices
cciss: Use kernel provided PCI state save and restore functions
cciss: fix board status waiting code
drbd: Removed checks for REQ_HARDBARRIER on incomming BIOs
drbd: REQ_HARDBARRIER -> REQ_FUA transition for meta data accesses
drbd: Removed the BIO_RW_BARRIER support form the receiver/epoch code
...
REQ_HARDBARRIER is dead now, so remove the leftovers. What's left
at this point is:
- various checks inside the block layer.
- sanity checks in bio based drivers.
- now unused bio_empty_barrier helper.
- Xen blockfront use of BLKIF_OP_WRITE_BARRIER - it's dead for a while,
but Xen really needs to sort out it's barrier situaton.
- setting of ordered tags in uas - dead code copied from old scsi
drivers.
- scsi different retry for barriers - it's dead and should have been
removed when flushes were converted to FS requests.
- blktrace handling of barriers - removed. Someone who knows blktrace
better should add support for REQ_FLUSH and REQ_FUA, though.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Convert direct reads of an inode's i_size to using i_size_read().
i_size_{read,write} use a seqcount to protect reads from accessing
incomple writes. Concurrent i_size_write()s require mutual exclussion
to protect the seqcount that is used by i_size_{read,write}. But
i_size_read() callers do not need to use additional locking.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: NeilBrown <neilb@suse.de>
Acked-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Linus Torvalds
Ian Campbell
David S. Miller
Tejun Heo
Stephen M. Cameron
Jeremy Fitzhardinge
Yehuda Sadeh
Lars Ellenberg
Arnd Bergmann
Jens Axboe
Jeff Garzik
Vivek Goyal
Christoph Hellwig
Mike Snitzer