28 Feb, 2006
1 commit
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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
Signed-off-by: Linus Torvalds
08 Feb, 2006
3 commits
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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
Acked-by: Jens Axboe
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
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
Signed-off-by: Jens Axboe
06 Feb, 2006
3 commits
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q->ordcolor must not be flipped on SOFTBARRIER.
Signed-off-by: Tejun Heo
Acked-by: Jens Axboe
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
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
Acked-by: Jens Axboe
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
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
Cc: "David S. Miller"
Cc: James Bottomley
Acked-by: Ingo Molnar
Cc: Jens Axboe
Cc: Anton Blanchard
Acked-by: William Irwin
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
02 Feb, 2006
1 commit
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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
Signed-off-by: Alasdair G Kergon
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
31 Jan, 2006
1 commit
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Signed-off-by: Jens Axboe
24 Jan, 2006
5 commits
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This makes XFS barrier mounts succeed on my SCSI system.
Signed-off-by: Tetsuo Takata
Signed-off-by: Jens Axboe -
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 availableTested for a range of boot options on 2.6.16-rc1-mm2.
Signed-off-by: Nate Diller
Signed-off-by: Jens Axboe -
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
Signed-off-by: Jens Axboe -
It can legally be called with interrupts/preemption enabled.
Signed-off-by: Jens Axboe
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IDE lba48 can support full 64k request size, which overflows the
max_hw_sectors variable.Signed-off-by: Jens Axboe
16 Jan, 2006
2 commits
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Signed-off-by: Jens Axboe
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Signed-off-by: Chuck Ebbert
Signed-off-by: Jens Axboe
15 Jan, 2006
1 commit
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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
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Jan, 2006
1 commit
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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
Signed-off-by: Jens Axboe
Signed-off-by: Linus Torvalds
12 Jan, 2006
1 commit
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- Move capable() from sched.h to capability.h;
- Use 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
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Jan, 2006
1 commit
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Manual merge for trivial #include changes
09 Jan, 2006
6 commits
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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
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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
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Signed-off-by: Jens Axboe
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elv_try_last_merge().
Signed-off-by: Coywolf Qi Hunt
Signed-off-by: Jens Axboe -
linux/blkdev.h included twice
Signed-off-by: Nicolas Kaiser
Signed-off-by: Jens Axboe -
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
Cc: Jens Axboe
Cc:
Cc: Jeff Dike
Cc: Paolo Giarrusso
Cc: Bartlomiej Zolnierkiewicz
Cc: Neil Brown
Cc: Markus Lidel
Cc: Russell King
Cc: David Woodhouse
Cc: Martin Schwidefsky
Cc: James Bottomley
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Jan, 2006
2 commits
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Manual fixup for merge with Jens' "Suspend support for libata", commit
ID 9b847548663ef1039dd49f0eb4463d001e596bc3.Signed-off-by: Linus Torvalds
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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
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Jan, 2006
6 commits
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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
Signed-off-by: Jens Axboe -
Separate out bio initialization part from __make_request. It
will be used by the following blk_ordered_reimpl.Signed-off-by: Tejun Heo
Signed-off-by: Jens Axboe -
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
Signed-Off-By: Jens Axboe -
the patch below marks various read-only variables in block/* as const,
so that gcc can optimize the use of them; eg gcc will replace the use by
the value directly now and will even remove the memory usage of these.Signed-off-by: Arjan van de Ven
Signed-off-by: Jens Axboe -
Originally from: Nick Piggin
Move current_io_context out of the get_request fastpth. Also try to
streamline a few other things in this area.Signed-off-by: Jens Axboe
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Unlike other ioscheds, as-iosched handles alias by chaing them using
rq->queuelist. As aliased requests are very rare in the first place,
this complicates merge/dispatch handling without meaningful
performance improvement. This patch updates as-iosched to dump
aliased requests into dispatch queue as other ioscheds do.Signed-off-by: Tejun Heo
Signed-off-by: Jens Axboe
05 Jan, 2006
3 commits
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Trivial manual merge fixup for usb_find_interface clashes.
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Leave the overloaded "hotplug" word to susbsystems which are handling
real devices. The driver core does not "plug" anything, it just exports
the state to userspace and generates events.Signed-off-by: Kay Sievers
Signed-off-by: Greg Kroah-Hartman
20 Dec, 2005
1 commit
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This is just a basic cleanup. No change in functionality.
Signed-off-by: Ben Collins
Signed-off-by: Linus Torvalds
16 Dec, 2005
1 commit
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- export __blk_put_request and blk_execute_rq_nowait
needed for async REQ_BLOCK_PC requests
- seperate max_hw_sectors and max_sectors for block/scsi_ioctl.c and
SG_IO bio.c helpers per Jens's last comments. Since block/scsi_ioctl.c SG_IO was
already testing against max_sectors and SCSI-ml was setting max_sectors and
max_hw_sectors to the same value this does not change any scsi SG_IO behavior. It only
prepares ll_rw_blk.c, scsi_ioctl.c and bio.c for when SCSI-ml begins to set
a valid max_hw_sectors for all LLDs. Today if a LLD does not set it
SCSI-ml sets it to a safe default and some LLDs set it to a artificial low
value to overcome memory and feedback issues.Note: Since we now cap max_sectors to BLK_DEF_MAX_SECTORS, which is 1024,
drivers that used to call blk_queue_max_sectors with a large value of
max_sectors will now see the fs requests capped to BLK_DEF_MAX_SECTORS.Signed-off-by: Mike Christie
Signed-off-by: James Bottomley
15 Dec, 2005
1 commit
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To send async requests we need these two functions exported.
Signed-off-by: Mike Christie
Signed-off-by: James Bottomley