Commit Graph

74 Commits

Author SHA1 Message Date
Jes Sorensen 58383af629 [PATCH] kobj_map semaphore to mutex conversion
Convert the kobj_map code to use a mutex instead of a semaphore.  It
converts the single two users as well, genhd.c and char_dev.c.

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-03-20 13:42:58 -08:00
Al Viro e572ec7e4e [PATCH] fix rmmod problems with elevator attributes, clean them up 2006-03-18 22:27:18 -05:00
Al Viro 3d1ab40f4c [PATCH] elevator_t lifetime rules and sysfs fixes 2006-03-18 18:35:43 -05:00
Al Viro 1cc9be68eb [PATCH] noise removal: cfq-iosched.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:35:08 -05:00
Al Viro a90d742e4c [PATCH] don't bother with refcounting for cfq_data
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:35:05 -05:00
Al Viro 483f4afc42 [PATCH] fix sysfs interaction and lifetime rules handling for queues 2006-03-18 18:34:37 -05:00
Al Viro 6f325a1344 [PATCH] fix cfq_get_queue()/ioprio_set(2) races
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:34:17 -05:00
Al Viro 334e94de9b [PATCH] deal with rmmod/put_io_context() races
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:34:15 -05:00
Al Viro e17a9489b4 [PATCH] stop elv_unregister() from rogering other iosched's data, fix locking
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:34:12 -05:00
Al Viro 25975f863b [PATCH] stop cfq from pinning queue down
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:34:09 -05:00
Al Viro d9ff418793 [PATCH] make cfq_exit_queue() prune the cfq_io_context for that queue
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:34:07 -05:00
Al Viro a6a0763a60 [PATCH] fix the exclusion for ioprio_set()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:34:04 -05:00
Al Viro 12a0573215 [PATCH] keep sync and async cfq_queue separate
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:34:02 -05:00
Al Viro 478a82b0ed [PATCH] switch to use of ->key to get cfq_data by cfq_io_context
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:33:59 -05:00
Al Viro 7670876d2d [PATCH] stop leaking cfq_data in cfq_set_request()
We don't need to pin ->key down; ->cfqq->cfqd will do that for us.
Incidentally, that stops the leak we had - that reference was never
dropped.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:33:56 -05:00
Al Viro b0a6916bcc [PATCH] fix cfq hash lookups
If somebody does a hash lookup for cfq_queue while ioprio of an async queue
is elevated, they shouldn't end up stuck with lowered ioprio when we go back.
Fix is to use ->org_ioprio{,class} in hash lookups.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:33:54 -05:00
Al Viro c981ff9f89 [PATCH] fix locking in queue_requests_store()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:33:51 -05:00
Al Viro 8669aafdb5 [PATCH] fix double-free in blk_init_queue_node()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-18 18:33:49 -05:00
Andi Kleen 5ee1af9f51 [PATCH] block: disable block layer bouncing for most memory on 64bit systems
The low level PCI DMA mapping functions should handle it in most cases.

This should fix problems with depleting the DMA zone early. The old
code used precious GFP_DMA memory in many cases where it was not needed.

Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-08 18:10:31 -08:00
Jens Axboe 7b14e3b52f [PATCH] cfq-iosched: slice expiry fixups
During testing of SLES10, we encountered a hang in the CFQ io scheduler.
Turns out the deferred slice expiry logic is buggy, so remove that for
now.  We could be left with an idle queue that would never wake up.  So
kill that logic, always expire immediately.  Also fix a potential timer
race condition.

Patch looks bigger than it is, because it moves a function.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-28 00:38:02 -08:00
Linus Torvalds b7ed1de0ae Merge branch 'for-linus' of git://brick.kernel.dk/data/git/linux-2.6-block 2006-02-08 07:58:18 -08:00
Tejun Heo 30e9656cc3 [PATCH] block: implement elv_insert and use it (fix ordcolor flipping bug)
q->ordcolor must only be flipped on initial queueing of a hardbarrier
request.

Constructing ordered sequence and requeueing used to pass through
__elv_add_request() which flips q->ordcolor when it sees a barrier
request.

This patch separates out elv_insert() from __elv_add_request() and uses
elv_insert() when constructing ordered sequence and requeueing.
elv_insert() inserts the given request at the specified position and
does nothing else.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-08 07:52:58 -08:00
Jens Axboe 01840f9c9d [PATCH] blk: Fix SG_IO ioctl failure retry looping
When issuing an SG_IO ioctl through sd that resulted in an unrecoverable
error, a nearly infinite retry loop was discovered. This is due to the
fact that the block layer SG_IO code is not setting up rq->retries. This
patch also fixes up the sg_scsi_ioctl path.

Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-02-08 10:07:13 +01:00
Tejun Heo 238e7db935 [PATCH] block: request_queue->ordcolor must not be flipped on SOFTBARRIER
q->ordcolor must not be flipped on SOFTBARRIER.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-05 11:06:51 -08:00
Jens Axboe 9a7a67af8b [PATCH] fix ordering on requeued request drainage
Previously, if a fs request which was being drained failed and got
requeued, blk_do_ordered() didn't allow it to be reissued, which causes
queue stall.  This patch makes blk_do_ordered() use the sequence of each
request to determine whether a request can be issued or not.  This fixes
the bug and simplifies code.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-05 11:06:51 -08:00
Eric Dumazet 88a2a4ac6b [PATCH] percpu data: only iterate over possible CPUs
percpu_data blindly allocates bootmem memory to store NR_CPUS instances of
cpudata, instead of allocating memory only for possible cpus.

As a preparation for changing that, we need to convert various 0 -> NR_CPUS
loops to use for_each_cpu().

(The above only applies to users of asm-generic/percpu.h.  powerpc has gone it
alone and is presently only allocating memory for present CPUs, so it's
currently corrupting memory).

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Jens Axboe <axboe@suse.de>
Cc: Anton Blanchard <anton@samba.org>
Acked-by: William Irwin <wli@holomorphy.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-05 11:06:51 -08:00
Jun'ichi "Nick" Nomura 3eaf840e0b [PATCH] device-mapper disk statistics: timing
Record I/O timing statistics

The start time is added to struct dm_io, an existing structure allocated
privately internally within dm and attached to each incoming bio.

We export disk_round_stats() from block/ll_rw_blk.c instead of creating a
private clone.

Signed-off-by: Jun'ichi "Nick" Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-01 08:53:11 -08:00
Jens Axboe fddfdeafa8 [BLOCK] A few kerneldoc fixups
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-31 15:24:34 +01:00
Tetsuo Takata 60481b12b8 [BLOCK] ll_rw_blk: fix setting of ->ordered on init
This makes XFS barrier mounts succeed on my SCSI system.

Signed-off-by: Tetsuo Takata <takatatt@intellilink.co.jp>
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-24 10:34:36 +01:00
Nate Diller 248d5ca5ed [BLOCK] elevator: allow default scheduler to potentially be modular
Jens has decided that allowing the default scheduler to be a module is
a bug, and should not be allowed under kconfig.  However, I find that
scenario useful for debugging, and wish for the kernel to be able to
handle this situation without OOPSing, if I enable such an option in
the .config directly.  This patch dynamically checks for the presence
of the compiled-in default, and falls back to no-op, emitting a
suitable error message, when the default is not available

Tested for a range of boot options on 2.6.16-rc1-mm2.

Signed-off-by: Nate Diller <nate.diller@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-24 10:09:14 +01:00
Nate Diller 5f00397644 [BLOCK] elevator: default choice selection
My previous default iosched patch did a poor job dealing with the
'elevator=' boot-time option.  The old behavior falls back to the
compiled-in default if the requested one is not registered at boot
time.  This patch dynamically evaluates which default
to use, and emits a suitable error message when the requested scheduler
is not available.  It also does the 'as' -> 'anticipatory' conversion
before elevator registration, which along with a modified registration
function, allows it to correctly indicate which default scheduler is
in use.

Tested for a range of boot options on 2.6.16-rc1-mm2.

Signed-off-by: Nate Diller <nate.diller@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-24 10:07:58 +01:00
Jens Axboe 53e86061b5 [BLOCK] ll_rw_blk: use preempt-disabling disk_stat_add() in completion
It can legally be called with interrupts/preemption enabled.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-24 10:06:19 +01:00
Jens Axboe 2cb2e147a6 [BLOCK] ll_rw_blk: make max_sectors and max_hw_sectors unsigned ints
IDE lba48 can support full 64k request size, which overflows the
max_hw_sectors variable.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-24 10:06:19 +01:00
Jens Axboe b7bfcf7cbd [BLOCK] elevator: if specified scheduler is not found, fall back to default
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-16 09:48:58 +01:00
Chuck Ebbert 752a3b7963 [BLOCK] elevator: Make elevator=as work again for anticipatory
Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-16 09:47:37 +01:00
Neil Horman 7170be5f58 [PATCH] convert /proc/devices to use seq_file interface
A Christoph suggested that the /proc/devices file be converted to use the
seq_file interface.  This patch does that.

I've obxerved one or two installation that had sufficiently large sans that
they overran the 4k limit on /proc/devices.

Signed-off-by: Neil Horman <nhorman@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-14 18:25:19 -08:00
Tejun Heo 1bc691d357 [PATCH] fix queue stalling while barrier sequencing
If ordered tag isn't supported, request ordering for barrier
sequencing is performed by queue draining, which basically hangs the
request queue until elv_completed_request() reports completion of all
previous fs requests.

The condition check in elv_completed_request() was only performed for
fs requests.  If a special request is queued between the last
to-be-drained request and the barrier sequence, draining is never
completed and the queue is stalled forever.

This patch moves the end-of-draining condition check such that it's
performed for all requests.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-12 09:05:39 -08:00
Randy.Dunlap c59ede7b78 [PATCH] move capable() to capability.h
- Move capable() from sched.h to capability.h;

- Use <linux/capability.h> where capable() is used
	(in include/, block/, ipc/, kernel/, a few drivers/,
	mm/, security/, & sound/;
	many more drivers/ to go)

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-11 18:42:13 -08:00
Linus Torvalds e2688f00dc Merge branch 'blk-softirq' of git://brick.kernel.dk/data/git/linux-2.6-block
Manual merge for trivial #include changes
2006-01-09 09:26:40 -08:00
Jens Axboe ff856bad67 [BLOCK] ll_rw_blk: Enable out-of-order request completions through softirq
Request completion can be a quite heavy process, since it needs to
iterate through the entire request and complete the bio's it holds.
This patch adds blk_complete_request() which moves this processing
into a dedicated block softirq.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09 16:02:34 +01:00
Jens Axboe 356cebea11 [BLOCK] Kill blk_attempt_remerge()
It's a broken interface, it's done way too late. And apparently it triggers
slab problems in recent kernels as well (most likely after the generic dispatch
code was merged). So kill it, ide-cd is the only user of it.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09 15:30:20 +01:00
Jens Axboe 5a57be8d10 [BLOCK] scsi_ioctl: file can be NULL from ioctl_by_bdev()
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09 14:52:21 +01:00
Coywolf Qi Hunt 769db45b73 make elv_try_merge() static, kill the dead declaration of
elv_try_last_merge().

Signed-off-by: Coywolf Qi Hunt <qiyong@fc-cn.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09 14:44:15 +01:00
Nicolas Kaiser 1abee6d2d1 [BLOCK][TRIVIAL] ll_rw_blk: header included twice
linux/blkdev.h included twice

Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09 14:44:15 +01:00
Christoph Hellwig a885c8c431 [PATCH] Add block_device_operations.getgeo block device method
HDIO_GETGEO is implemented in most block drivers, and all of them have to
duplicate the code to copy the structure to userspace, as well as getting
the start sector.  This patch moves that to common code [1] and adds a
->getgeo method to fill out the raw kernel hd_geometry structure.  For many
drivers this means ->ioctl can go away now.

[1] the s390 block drivers are odd in this respect.  xpram sets ->start
    to 4 always which seems more than odd, and the dasd driver shifts
    the start offset around, probably because of it's non-standard
    sector size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@suse.de>
Cc: <mike.miller@hp.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Cc: Markus Lidel <Markus.Lidel@shadowconnect.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08 20:13:54 -08:00
Linus Torvalds d99cf9d679 Merge branch 'post-2.6.15' of git://brick.kernel.dk/data/git/linux-2.6-block
Manual fixup for merge with Jens' "Suspend support for libata", commit
ID 9b84754866.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-06 09:01:25 -08:00
Martin Schwidefsky 347a8dc3b8 [PATCH] s390: cleanup Kconfig
Sanitize some s390 Kconfig options.  We have ARCH_S390, ARCH_S390X,
ARCH_S390_31, 64BIT, S390_SUPPORT and COMPAT.  Replace these 6 options by
S390, 64BIT and COMPAT.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-06 08:33:53 -08:00
Tejun Heo 797e7dbbee [BLOCK] reimplement handling of barrier request
Reimplement handling of barrier requests.

* Flexible handling to deal with various capabilities of
  target devices.
* Retry support for falling back.
* Tagged queues which don't support ordered tag can do ordered.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-06 09:51:03 +01:00
Tejun Heo 52d9e67536 [BLOCK] ll_rw_blk: separate out bio init part from __make_request
Separate out bio initialization part from __make_request.  It
will be used by the following blk_ordered_reimpl.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-06 09:49:58 +01:00
Tejun Heo 8ffdc6550c [BLOCK] add @uptodate to end_that_request_last() and @error to rq_end_io_fn()
add @uptodate argument to end_that_request_last() and @error
to rq_end_io_fn().  there's no generic way to pass error code
to request completion function, making generic error handling
of non-fs request difficult (rq->errors is driver-specific and
each driver uses it differently).  this patch adds @uptodate
to end_that_request_last() and @error to rq_end_io_fn().

for fs requests, this doesn't really matter, so just using the
same uptodate argument used in the last call to
end_that_request_first() should suffice.  imho, this can also
help the generic command-carrying request jens is working on.

Signed-off-by: tejun heo <htejun@gmail.com>
Signed-Off-By: Jens Axboe <axboe@suse.de>
2006-01-06 09:49:03 +01:00