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Commit Graph

37782 Commits

Author SHA1 Message Date
David Howells
811d736f9e [PATCH] BLOCK: Dissociate generic_writepages() from mpage stuff [try #6]
Dissociate the generic_writepages() function from the mpage stuff, moving its
declaration to linux/mm.h and actually emitting a full implementation into
mm/page-writeback.c.

The implementation is a partial duplicate of mpage_writepages() with all BIO
references removed.

It is used by NFS to do writeback.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:52:26 +02:00
David Howells
7b0de42d7c [PATCH] BLOCK: Remove dependence on existence of blockdev_superblock [try #6]
Move blockdev_superblock extern declaration from fs/fs-writeback.c to a
headerfile and remove the dependence on it by wrapping it in a macro.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:52:26 +02:00
David Howells
07f3f05c1e [PATCH] BLOCK: Move extern declarations out of fs/*.c into header files [try #6]
Create a new header file, fs/internal.h, for common definitions local to the
sources in the fs/ directory.

Move extern definitions that should be in header files from fs/*.c to
fs/internal.h or other main header files where they span directories.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:52:18 +02:00
David Howells
65e6f5bc81 [PATCH] BLOCK: Don't call block_sync_page() from AFS [try #6]
The AFS filesystem no longer needs to override its sync_page() op.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:32:12 +02:00
David Howells
831058dec3 [PATCH] BLOCK: Separate the bounce buffering code from the highmem code [try #6]
Move the bounce buffer code from mm/highmem.c to mm/bounce.c so that it can be
more easily disabled when the block layer is disabled.

!!!NOTE!!! There may be a bug in this code: Should init_emergency_pool() be
	   contingent on CONFIG_HIGHMEM?

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:32:11 +02:00
David Howells
b398f6bff9 [PATCH] BLOCK: Stop fallback_migrate_page() from using page_has_buffers() [try #6]
Stop fallback_migrate_page() from using page_has_buffers() since that might not
be available.  Use PagePrivate() instead since that's more general.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:31:20 +02:00
David Howells
0d67a46df0 [PATCH] BLOCK: Remove duplicate declaration of exit_io_context() [try #6]
Remove the duplicate declaration of exit_io_context() from linux/sched.h.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:31:20 +02:00
David Howells
cf9a2ae8d4 [PATCH] BLOCK: Move functions out of buffer code [try #6]
Move some functions out of the buffering code that aren't strictly buffering
specific.  This is a precursor to being able to disable the block layer.

 (*) Moved some stuff out of fs/buffer.c:

     (*) The file sync and general sync stuff moved to fs/sync.c.

     (*) The superblock sync stuff moved to fs/super.c.

     (*) do_invalidatepage() moved to mm/truncate.c.

     (*) try_to_release_page() moved to mm/filemap.c.

 (*) Moved some related declarations between header files:

     (*) declarations for do_invalidatepage() and try_to_release_page() moved
     	 to linux/mm.h.

     (*) __set_page_dirty_buffers() moved to linux/buffer_head.h.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:31:19 +02:00
Martin Peschke
4090959aee [PATCH] blktrace: cleanup using on_each_cpu
This patch kills a few lines of code in blktrace by making use of
on_each_cpu().

Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:31:19 +02:00
Oleg Nesterov
cf342e52e3 [PATCH] Don't need to disable interrupts for tasklist_lock
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:31:18 +02:00
Oleg Nesterov
25034d7a83 [PATCH] exit_io_context: don't disable irqs
We don't need to disable irqs to clear current->io_context, it is protected
by ->alloc_lock. Even IF it was possible to submit I/O from IRQ on behalf of
current this irq_disable() can't help: current_io_context() will re-instantiate
->io_context after irq_enable().

We don't need task_lock() or local_irq_disable() to clear ioc->task. This can't
prevent other CPUs from playing with our io_context anyway.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:31:18 +02:00
Jens Axboe
9bf09c2385 [PATCH] SCSI: scsi_done_q is unused
It is a leftover from before the softirq completion was migrated
to the block layer.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:31:11 +02:00
Linus Torvalds
e823aff2d6 Merge branch 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (36 commits)
  drm: Use register writes instead of BITBLT_MULTI packets for buffer swap blits
  drm: use radeon specific names for radeon flags
  drm: add device/vendor id to drm_device_t for compat with FreeBSD drivers
  drm: allow multiple addMaps with the same 32-bit map offsset.
  drm: fd.o Bug #7595: Avoid u32 overflows in radeon_check_and_fixup_offset().
  drm: Fix hashtab implementation leaking illegal error codes to user space.
  drm: domain changes broke ppc r200
  drm: fixup setversion return codes..
  drm: fixup i915 error codes
  drm: realign sosme radeon code with drm git tree
  drm: realign via driver with drm git tree
  drm: remove hash tables on drm exit
  drm: cleanups
  drm: i810_dma.c: fix pointer arithmetic for 64-bit target
  drm: avoid kernel oops in some error paths calling drm_lastclose
  drm: allow detection of new VIA chipsets
  drm: fix i965 build bug
  drm: remove FALSE/TRUE that snuck in with simple memory manager changes.
  drm: Add support for Intel i965G chipsets.
  drm: add better explanation for i830/i915
  ...
2006-09-30 11:29:54 -07:00
Jens Axboe
7457e6e2d7 [PATCH] blktrace: support for logging metadata reads
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:43 +02:00
Jens Axboe
374f84ac39 [PATCH] cfq-iosched: use metadata read flag
Give meta data reads preference over regular reads, as the process
often needs to get that out of the way to do the io it was actually
interested in.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:43 +02:00
Jens Axboe
caa38fb0f4 [PATCH] ext3: make meta data reads use READ_META
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:42 +02:00
Jens Axboe
5404bc7a87 [PATCH] Allow file systems to differentiate between data and meta reads
We can use this information for making more intelligent priority
decisions, and it will also be useful for blktrace.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:42 +02:00
Jens Axboe
da20a20f3b [PATCH] ll_rw_blk: allow more flexibility for read_ahead_kb store
It can make sense to set read-ahead larger than a single request.
We should not be enforcing such policy on the user. Additionally,
using the BLKRASET ioctl doesn't impose such a restriction. So
additionally we now expose identical behaviour through the two.

Issue also reported by Anton <cbou@mail.ru>

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:41 +02:00
Jens Axboe
bf57225670 [PATCH] cfq-iosched: improve queue preemption
Don't touch the current queues, just make sure that the wanted queue
is selected next. Simplifies the logic.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:41 +02:00
Jens Axboe
dc72ef4ae3 [PATCH] Add blk_start_queueing() helper
CFQ implements this on its own now, but it's really block layer
knowledge. Tells a device queue to start dispatching requests to
the driver, taking care to unplug if needed. Also fixes the issue
where as/cfq will invoke a stopped queue, which we really don't
want.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:40 +02:00
Jens Axboe
981a79730d [PATCH] cfq-iosched: kill the empty_list
No point in having a place holder list just for empty queues, so remove
it. It's not used for anything other than to keep ->cfq_list busy.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:40 +02:00
Jens Axboe
53b03744e5 [PATCH] cfq-iosched: Kill O(N) runtime of cfq_resort_rr_list()
Currently it scales with number of processes in that priority group,
which is potentially not very nice as it's called quite often.
Basically we always need to do tail inserts, except for the case of a
new process. So just mark/detect a queue as such.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:39 +02:00
Jens Axboe
b5deef9012 [PATCH] Make sure all block/io scheduler setups are node aware
Some were kmalloc_node(), some were still kmalloc(). Change them all to
kmalloc_node().

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:39 +02:00
Jens Axboe
a3b05e8f58 [PATCH] Kill various deprecated/unused block layer defines/functions
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:38 +02:00
Jens Axboe
1ea25ecb72 [PATCH] Audit block layer inlines
Kill a few inlines that bring in too much code to more than one location
Shrinks kernel text by about 300 bytes on 32-bit x86.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:38 +02:00
Jens Axboe
4050cf1674 [PATCH] cfq-iosched: use new io context counting mechanism
It's ok if the read path is a lot more costly, as long as inc/dec is
really cheap. The inc/dec will happen for each created/freed io context,
while the reading only happens when a disk queue exits.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:37 +02:00
Jens Axboe
e4313dd423 [PATCH] as-iosched: use new io context counting mechanism
It's ok if the read path is a lot more costly, as long as inc/dec is
really cheap. The inc/dec will happen for each created/freed io context,
while the reading only happens when a disk queue exits.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:37 +02:00
Jens Axboe
4a893e837b [PATCH] elevator: define ioc counting mechanism
None of the in-kernel primitives for handling "atomic" counting seem
to be a good fit. We need something that is essentially free for
incrementing/decrementing, while the read side may be more expensive
as we only ever need to do that when a device is removed from the
kernel.

Use a per-cpu variable for maintaining a per-cpu ioc count and define
a reading mechanism that just sums up the values.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:36 +02:00
Jens Axboe
fc46379daf [PATCH] cfq-iosched: kill cfq_exit_lock
cfq_exit_lock is protecting two things now:

- The per-ioc rbtree of cfq_io_contexts

- The per-cfqd linked list of cfq_io_contexts

The per-cfqd linked list can be protected by the queue lock, as it is (by
definition) per cfqd as the queue lock is.

The per-ioc rbtree is mainly used and updated by the process itself only.
The only outside use is the io priority changing. If we move the
priority changing to not browsing the rbtree, we can remove any locking
from the rbtree updates and lookup completely. Let the sys_ioprio syscall
just mark processes as having the iopriority changed and lazily update
the private cfq io contexts the next time io is queued, and we can
remove this locking as well.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:36 +02:00
Jens Axboe
89850f7ee9 [PATCH] cfq-iosched: cleanups, fixes, dead code removal
A collection of little fixes and cleanups:

- We don't use the 'queued' sysfs exported attribute, since the
  may_queue() logic was rewritten. So kill it.

- Remove dead defines.

- cfq_set_active_queue() can be rewritten cleaner with else if conditions.

- Several places had cfq_exit_cfqq() like logic, abstract that out and
  use that.

- Annotate the cfqq kmem_cache_alloc() so the allocator knows that this
  is a repeat allocation if it fails with __GFP_WAIT set. Allows the
  allocator to start freeing some memory, if needed. CFQ already loops for
  this condition, so might as well pass the hint down.

- Remove cfqd->rq_starved logic. It's not needed anymore after we dropped
  the crq allocation in cfq_set_request().

- Remove uneeded parameter passing.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:35 +02:00
Jens Axboe
e6a1c874a0 [PATCH] struct request: shrink and optimize some more
Move some members around and unionize completion_data and rb_node since
they cannot ever be used at the same time.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:35 +02:00
Jens Axboe
51da90fcb6 [PATCH] ll_rw_blk: cleanup __make_request()
- Don't assign variables that are only used once.

- Kill spin_lock() prefetching, it's opportunistic at best.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:34 +02:00
Jens Axboe
cb78b285c8 [PATCH] Drop useless bio passing in may_queue/set_request API
It's not needed for anything, so kill the bio passing.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:23 +02:00
Jens Axboe
cdd6026217 [PATCH] Remove ->rq_status from struct request
After Christophs SCSI change, the only usage left is RQ_ACTIVE
and RQ_INACTIVE. The block layer sets RQ_INACTIVE right before freeing
the request, so any check for RQ_INACTIVE in a driver is a bug and
indicates use-after-free.

So kill/clean the remaining users, straight forward.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:23 +02:00
Jens Axboe
49171e5c6f [PATCH] Remove struct request_list from struct request
It is always identical to &q->rq, and we only use it for detecting
whether this request came out of our mempool or not. So replace it
with an additional ->flags bit flag.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:29:22 +02:00
Jens Axboe
c00895ab2f [PATCH] Remove ->waiting member from struct request
As the comments indicates in blkdev.h, we can fold it into ->end_io_data
usage as that is really what ->waiting is. Fixup the users of
blk_end_sync_rq().

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:29:12 +02:00
Jens Axboe
8a8e674cb1 [PATCH] as-iosched: kill arq
Get rid of the as_rq request type. With the added elevator_private2, we
have enough room in struct request to get rid of any arq allocation/free
for each request.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Nick Piggin <npiggin@suse.de>
2006-09-30 20:27:02 +02:00
Jens Axboe
5e70537479 [PATCH] cfq-iosched: kill crq
Get rid of the cfq_rq request type. With the added elevator_private2, we
have enough room in struct request to get rid of any crq allocation/free
for each request.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:27:02 +02:00
Jens Axboe
ff7d145fd9 [PATCH] Add one more pointer to struct request for IO scheduler usage
Then we have enough room in the request to get rid of the dynamic
allocations in CFQ/AS.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:27:01 +02:00
Jens Axboe
5380a101d3 [PATCH] cfq-iosched: remove the crq flag functions/variable
There's just one flag currently (SYNC), and that one can be grabbed from
the request.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:27:01 +02:00
Jens Axboe
8840faa1ee [PATCH] deadline-iosched: remove elevator private drq request type
A big win, we now save an allocation/free on each request! With the
previous rb/hash abstractions, we can just reuse queuelist/donelist
for the FIFO data and be done with it.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:27:00 +02:00
Jens Axboe
9e2585a8a2 [PATCH] as-iosched: remove arq->is_sync member
We can track this in struct request.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Nick Piggin <npiggin@suse.de>
2006-09-30 20:27:00 +02:00
Jens Axboe
d4f2f4629e [PATCH] as-iosched: reuse rq for fifo
Saves some space in arq.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Nick Piggin <npiggin@suse.de>
2006-09-30 20:27:00 +02:00
Jens Axboe
95e8810b28 [PATCH] cfq-iosched: convert to using the FIFO elevator defines
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:26:59 +02:00
Jens Axboe
1fbfdfcddf [PATCH] elevator: introduce a way to reuse rq for internal FIFO handling
The io schedulers can use this instead of having to allocate space for
it themselves.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:26:59 +02:00
Jens Axboe
b8aca35af5 [PATCH] deadline-iosched: migrate to using the elevator rb functions
This removes the rbtree handling from deadline.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:26:58 +02:00
Jens Axboe
21183b07ee [PATCH] cfq-iosched: migrate to using the elevator rb functions
This removes the rbtree handling from CFQ.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:26:58 +02:00
Jens Axboe
e37f346e34 [PATCH] as-iosched: migrate to using the elevator rb functions
This removes the rbtree handling from AS.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Nick Piggin <npiggin@suse.de>
2006-09-30 20:26:57 +02:00
Jens Axboe
2e662b65f0 [PATCH] elevator: abstract out the rbtree sort handling
The rbtree sort/lookup/reposition logic is mostly duplicated in
cfq/deadline/as, so move it to the elevator core. The io schedulers
still provide the actual rb root, as we don't want to impose any sort
of specific handling on the schedulers.

Introduce the helpers and rb_node in struct request to help migrate the
IO schedulers.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:26:57 +02:00
Jens Axboe
10fd48f237 [PATCH] rbtree: fixed reversed RB_EMPTY_NODE and rb_next/prev
The conditions got reserved. Also make rb_next() and rb_prev() check
for the empty condition.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:26:56 +02:00