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  13. 11 Feb, 2007 1 commit
  15. 19 Dec, 2006 2 commits
  17. 12 Dec, 2006 1 commit
    • Boaz Harrosh's avatar
      [PATCH] remove blk_queue_activity_fn · 2b02a179
      Boaz Harrosh authored 
      
While working on bidi support at struct request level
I have found that blk_queue_activity_fn is actually never used.
The only user is in ide-probe.c with this code:

	/* enable led activity for disk drives only */
	if (drive->media == ide_disk && hwif->led_act)
		blk_queue_activity_fn(q, hwif->led_act, drive);

And led_act is never initialized anywhere.
(Looking back at older kernels it was used in the PPC arch, but was removed around 2.6.18)
Unless it is all for future use off course.
(this patch is against linux-2.6-block.git as off 2006/12/4)
Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
      2b02a179
  19. 01 Dec, 2006 1 commit
  21. 20 Oct, 2006 2 commits
  23. 12 Oct, 2006 1 commit
  25. 04 Oct, 2006 1 commit
  27. 30 Sep, 2006 16 commits
    • Andrew Morton's avatar
      [PATCH] CONFIG_BLOCK: blk_congestion_wait() fix · bcfd8d36
      Andrew Morton authored 
      
Don't just do nothing: it'll cause busywaits all over writeback and page
reclaim.

For now, take a fixed-length nap.  Will improve when NFS starts waking up
throttled processes.
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      bcfd8d36
    • David Howells's avatar
      [PATCH] BLOCK: Make it possible to disable the block layer [try #6] · 9361401e
      David Howells authored 
      
Make it possible to disable the block layer.  Not all embedded devices require
it, some can make do with just JFFS2, NFS, ramfs, etc - none of which require
the block layer to be present.

This patch does the following:

 (*) Introduces CONFIG_BLOCK to disable the block layer, buffering and blockdev
     support.

 (*) Adds dependencies on CONFIG_BLOCK to any configuration item that controls
     an item that uses the block layer.  This includes:

     (*) Block I/O tracing.

     (*) Disk partition code.

     (*) All filesystems that are block based, eg: Ext3, ReiserFS, ISOFS.

     (*) The SCSI layer.  As far as I can tell, even SCSI chardevs use the
     	 block layer to do scheduling.  Some drivers that use SCSI facilities -
     	 such as USB storage - end up disabled indirectly from this.

     (*) Various block-based device drivers, such as IDE and the old CDROM
     	 drivers.

     (*) MTD blockdev handling and FTL.

     (*) JFFS - which uses set_bdev_super(), something it could avoid doing by
     	 taking a leaf out of JFFS2's book.

 (*) Makes most of the contents of linux/blkdev.h, linux/buffer_head.h and
     linux/elevator.h contingent on CONFIG_BLOCK being set.  sector_div() is,
     however, still used in places, and so is still available.

 (*) Also made contingent are the contents of linux/mpage.h, linux/genhd.h and
     parts of linux/fs.h.

 (*) Makes a number of files in fs/ contingent on CONFIG_BLOCK.

 (*) Makes mm/bounce.c (bounce buffering) contingent on CONFIG_BLOCK.

 (*) set_page_dirty() doesn't call __set_page_dirty_buffers() if CONFIG_BLOCK
     is not enabled.

 (*) fs/no-block.c is created to hold out-of-line stubs and things that are
     required when CONFIG_BLOCK is not set:

     (*) Default blockdev file operations (to give error ENODEV on opening).

 (*) Makes some /proc changes:

     (*) /proc/devices does not list any blockdevs.

     (*) /proc/diskstats and /proc/partitions are contingent on CONFIG_BLOCK.

 (*) Makes some compat ioctl handling contingent on CONFIG_BLOCK.

 (*) If CONFIG_BLOCK is not defined, makes sys_quotactl() return -ENODEV if
     given command other than Q_SYNC or if a special device is specified.

 (*) In init/do_mounts.c, no reference is made to the blockdev routines if
     CONFIG_BLOCK is not defined.  This does not prohibit NFS roots or JFFS2.

 (*) The bdflush, ioprio_set and ioprio_get syscalls can now be absent (return
     error ENOSYS by way of cond_syscall if so).

 (*) The seclvl_bd_claim() and seclvl_bd_release() security calls do nothing if
     CONFIG_BLOCK is not set, since they can't then happen.
Signed-Off-By: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      9361401e
    • Jens Axboe's avatar
      [PATCH] Allow file systems to differentiate between data and meta reads · 5404bc7a
      Jens Axboe authored 
      
We can use this information for making more intelligent priority
decisions, and it will also be useful for blktrace.
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
      5404bc7a
    • Jens Axboe's avatar
      [PATCH] Add blk_start_queueing() helper · dc72ef4a
      Jens Axboe authored 
      
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: default avatarJens Axboe <axboe@suse.de>
      dc72ef4a
    • Jens Axboe's avatar
      [PATCH] Make sure all block/io scheduler setups are node aware · b5deef90
      Jens Axboe authored 
      
Some were kmalloc_node(), some were still kmalloc(). Change them all to
kmalloc_node().
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
      b5deef90
    • Jens Axboe's avatar
      [PATCH] Kill various deprecated/unused block layer defines/functions · a3b05e8f
      Jens Axboe authored 
      Signed-off-by: default avatarJens Axboe <axboe@suse.de>
      a3b05e8f
    • Jens Axboe's avatar
      [PATCH] cfq-iosched: kill cfq_exit_lock · fc46379d
      Jens Axboe authored 
      
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: default avatarJens Axboe <axboe@suse.de>
      fc46379d
    • Jens Axboe's avatar
      [PATCH] struct request: shrink and optimize some more · e6a1c874
      Jens Axboe authored 
      
Move some members around and unionize completion_data and rb_node since
they cannot ever be used at the same time.
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
      e6a1c874
    • Jens Axboe's avatar
      [PATCH] Remove ->rq_status from struct request · cdd60262
      Jens Axboe authored 
      
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: default avatarJens Axboe <axboe@suse.de>
      cdd60262
    • Jens Axboe's avatar
      [PATCH] Remove struct request_list from struct request · 49171e5c
      Jens Axboe authored 
      
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: default avatarJens Axboe <axboe@suse.de>
      49171e5c
    • Jens Axboe's avatar
      [PATCH] Remove ->waiting member from struct request · c00895ab
      Jens Axboe authored 
      
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: default avatarJens Axboe <axboe@kernel.dk>
      c00895ab
    • Jens Axboe's avatar
      [PATCH] Add one more pointer to struct request for IO scheduler usage · ff7d145f
      Jens Axboe authored 
      
Then we have enough room in the request to get rid of the dynamic
allocations in CFQ/AS.
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
      ff7d145f
    • Jens Axboe's avatar
      [PATCH] as-iosched: remove arq->is_sync member · 9e2585a8
      Jens Axboe authored 
      
We can track this in struct request.
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
Signed-off-by: default avatarNick Piggin <npiggin@suse.de>
      9e2585a8
    • Jens Axboe's avatar
      [PATCH] elevator: abstract out the rbtree sort handling · 2e662b65
      Jens Axboe authored 
      
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: default avatarJens Axboe <axboe@suse.de>
      2e662b65
    • Jens Axboe's avatar
      [PATCH] elevator: move the backmerging logic into the elevator core · 9817064b
      Jens Axboe authored 
      
Right now, every IO scheduler implements its own backmerging (except for
noop, which does no merging). That results in duplicated code for
essentially the same operation, which is never a good thing. This patch
moves the backmerging out of the io schedulers and into the elevator
core. We save 1.6kb of text and as a bonus get backmerging for noop as
well. Win-win!
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
      9817064b
    • Jens Axboe's avatar
      [PATCH] Split struct request ->flags into two parts · 4aff5e23
      Jens Axboe authored 
      
Right now ->flags is a bit of a mess: some are request types, and
others are just modifiers. Clean this up by splitting it into
->cmd_type and ->cmd_flags. This allows introduction of generic
Linux block message types, useful for sending generic Linux commands
to block devices.
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
      4aff5e23
  29. 29 Sep, 2006 1 commit
  31. 23 Sep, 2006 1 commit
  33. 31 Aug, 2006 1 commit
  35. 23 Jun, 2006 2 commits