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Date: Tue, 12 Sep 2006 12:11:41 +0200
From: Jens Axboe <axboe@...nel.dk>
To: linux-kernel@...r.kernel.org
Subject: What's in linux-2.6-block.git
Hi,
This lists the main features of the 'block' branch, which is bound for
Linus when 2.6.19 opens:
- Splitting of request->flags into two parts:
- cmd type
- modified flags
Right now it's a bit of a mess, splitting this up invites a cleaner
usage and also enables us to implement generic "messages" passed on
the regular queue for the device.
- Abstract out the request back merging and put it into the core io
scheduler layer. Cleans up all the io schedulers, and noop gets
merging for "free".
- Abstract out the rbtree sorting. Gets rid of duplicated code in
as/cfq/deadline.
- General shrinkage of the request structure.
- Killing dynamic rq private structures in deadline/as/cfq. This should
speed up the io path somewhat, as we avoid allocating several
structures (struct request + scheduler private request) for each io
request.
- meta data io logging for blktrace.
- CFQ improvements.
- Make the block layer configurable through Kconfig (David Howells).
- Lots of cleanups.
The repo can be found here:
git://git.kernel.dk/data/git/linux-2.6-block.git
Andrew Morton:
CONFIG_BLOCK internal.h cleanups
CONFIG_BLOCK: blk_congestion_wait() fix
David Howells:
BLOCK: Move functions out of buffer code [try #6]
BLOCK: Remove duplicate declaration of exit_io_context() [try #6]
BLOCK: Stop fallback_migrate_page() from using page_has_buffers() [try #6]
BLOCK: Separate the bounce buffering code from the highmem code [try #6]
BLOCK: Don't call block_sync_page() from AFS [try #6]
BLOCK: Move extern declarations out of fs/*.c into header files [try #6]
BLOCK: Remove dependence on existence of blockdev_superblock [try #6]
BLOCK: Dissociate generic_writepages() from mpage stuff [try #6]
BLOCK: Move __invalidate_device() to block_dev.c [try #6]
BLOCK: Move the loop device ioctl compat stuff to the loop driver [try #6]
BLOCK: Move common FS-specific ioctls to linux/fs.h [try #6]
BLOCK: Move the ReiserFS device ioctl compat stuff to the ReiserFS driver [try #6]
BLOCK: Move the Ext2 device ioctl compat stuff to the Ext2 driver [try #6]
BLOCK: Move the Ext3 device ioctl compat stuff to the Ext3 driver [try #6]
BLOCK: Move the msdos device ioctl compat stuff to the msdos driver [try #6]
BLOCK: Remove no-longer necessary linux/mpage.h inclusions [try #6]
BLOCK: Remove no-longer necessary linux/buffer_head.h inclusions [try #6]
BLOCK: Make it possible to disable the block layer [try #6]
BLOCK: Make USB storage depend on SCSI rather than selecting it [try #6]
Jens Axboe:
Split struct request ->flags into two parts
elevator: move the backmerging logic into the elevator core
rbtree: fixed reversed RB_EMPTY_NODE and rb_next/prev
elevator: abstract out the rbtree sort handling
as-iosched: migrate to using the elevator rb functions
cfq-iosched: migrate to using the elevator rb functions
deadline-iosched: migrate to using the elevator rb functions
elevator: introduce a way to reuse rq for internal FIFO handling
cfq-iosched: convert to using the FIFO elevator defines
as-iosched: reuse rq for fifo
as-iosched: remove arq->is_sync member
deadline-iosched: remove elevator private drq request type
cfq-iosched: remove the crq flag functions/variable
Add one more pointer to struct request for IO scheduler usage
cfq-iosched: kill crq
as-iosched: kill arq
Remove ->waiting member from struct request
Remove struct request_list from struct request
Remove ->rq_status from struct request
Drop useless bio passing in may_queue/set_request API
ll_rw_blk: cleanup __make_request()
struct request: shrink and optimize some more
cfq-iosched: cleanups, fixes, dead code removal
cfq-iosched: kill cfq_exit_lock
elevator: define ioc counting mechanism
as-iosched: use new io context counting mechanism
cfq-iosched: use new io context counting mechanism
Audit block layer inlines
Kill various deprecated/unused block layer defines/functions
Make sure all block/io scheduler setups are node aware
cfq-iosched: Kill O(N) runtime of cfq_resort_rr_list()
cfq-iosched: kill the empty_list
Add blk_start_queueing() helper
cfq-iosched: improve queue preemption
ll_rw_blk: allow more flexibility for read_ahead_kb store
Allow file systems to differentiate between data and meta reads
ext3: make meta data reads use READ_META
cfq-iosched: use metadata read flag
blktrace: support for logging metadata reads
SCSI: scsi_done_q is unused
Update axboe@...e.de email address
Martin Peschke:
[Patch] blktrace: cleanup using on_each_cpu
Milan Broz:
fix creating zero sized bio mempools in low memory system
Oleg Nesterov:
exit_io_context: don't disable irqs
Don't need to disable interrupts for tasklist_lock
MAINTAINERS | 8
arch/frv/Kconfig | 4
arch/frv/kernel/time.c | 81 ++++
arch/ia64/kernel/sys_ia64.c | 28 +
arch/sparc/kernel/sys_sparc.c | 27 +
arch/sparc64/kernel/sys_sparc.c | 36 +-
arch/um/drivers/ubd_kern.c | 2
block/Kconfig | 20 +
block/Kconfig.iosched | 3
block/Makefile | 2
block/as-iosched.c | 672 +++++++-----------------------
block/blktrace.c | 26 -
block/cfq-iosched.c | 865 +++++++++++++--------------------------
block/deadline-iosched.c | 464 +++------------------
block/elevator.c | 315 ++++++++++++--
block/ll_rw_blk.c | 223 ++++------
block/noop-iosched.c | 2
block/scsi_ioctl.c | 6
drivers/block/DAC960.c | 2
drivers/block/Kconfig | 4
drivers/block/cciss.c | 1
drivers/block/cpqarray.c | 1
drivers/block/floppy.c | 4
drivers/block/loop.c | 160 +++++++
drivers/block/nbd.c | 8
drivers/block/paride/pd.c | 6
drivers/block/pktcdvd.c | 8
drivers/block/swim3.c | 4
drivers/block/swim_iop.c | 4
drivers/block/xd.c | 2
drivers/cdrom/Kconfig | 2
drivers/cdrom/cdrom.c | 2
drivers/cdrom/cdu31a.c | 4
drivers/char/Kconfig | 1
drivers/char/random.c | 4
drivers/fc4/fc.c | 1
drivers/ide/Kconfig | 4
drivers/ide/ide-cd.c | 69 ++-
drivers/ide/ide-disk.c | 5
drivers/ide/ide-dma.c | 2
drivers/ide/ide-floppy.c | 17 -
drivers/ide/ide-io.c | 50 +-
drivers/ide/ide-lib.c | 5
drivers/ide/ide-proc.c | 2
drivers/ide/ide-tape.c | 14 -
drivers/ide/ide-taskfile.c | 8
drivers/ide/ide.c | 8
drivers/ide/legacy/hd.c | 2
drivers/ide/pci/sis5513.c | 2
drivers/md/Kconfig | 3
drivers/md/dm-emc.c | 3
drivers/message/i2o/Kconfig | 2
drivers/message/i2o/i2o_block.c | 7
drivers/mmc/Kconfig | 2
drivers/mmc/Makefile | 3
drivers/mmc/mmc_queue.c | 6
drivers/mtd/Kconfig | 12 -
drivers/mtd/devices/Kconfig | 2
drivers/mtd/mtd_blkdevs.c | 2
drivers/net/Kconfig | 2
drivers/s390/block/Kconfig | 2
drivers/s390/block/dasd_diag.c | 2
drivers/s390/block/dasd_eckd.c | 2
drivers/s390/block/dasd_fba.c | 2
drivers/scsi/Kconfig | 2
drivers/scsi/aic7xxx_old.c | 4
drivers/scsi/ide-scsi.c | 16 -
drivers/scsi/pluto.c | 6
drivers/scsi/scsi.c | 13 -
drivers/scsi/scsi_lib.c | 37 +-
drivers/scsi/sd.c | 5
drivers/scsi/sun3_NCR5380.c | 2
drivers/scsi/sun3_scsi.c | 2
drivers/scsi/sun3_scsi_vme.c | 2
drivers/usb/storage/Kconfig | 5
fs/Kconfig | 31 +
fs/Makefile | 14 -
fs/afs/file.c | 2
fs/binfmt_elf.c | 1
fs/bio.c | 4
fs/block_dev.c | 23 +
fs/buffer.c | 174 --------
fs/char_dev.c | 1
fs/cifs/file.c | 1
fs/cifs/inode.c | 1
fs/cifs/ioctl.c | 7
fs/compat.c | 8
fs/compat_ioctl.c | 208 +--------
fs/dcache.c | 4
fs/ext2/dir.c | 3
fs/ext2/ext2.h | 1
fs/ext2/file.c | 6
fs/ext2/ioctl.c | 32 +
fs/ext3/dir.c | 3
fs/ext3/file.c | 3
fs/ext3/inode.c | 16 -
fs/ext3/ioctl.c | 55 ++
fs/ext3/namei.c | 3
fs/fat/dir.c | 56 +++
fs/fs-writeback.c | 9
fs/hfsplus/hfsplus_fs.h | 8
fs/hfsplus/ioctl.c | 17 -
fs/inode.c | 21 -
fs/internal.h | 55 ++
fs/ioprio.c | 19 +
fs/jfs/ioctl.c | 15 -
fs/mpage.c | 2
fs/namespace.c | 12 -
fs/nfs/direct.c | 50 ++
fs/nfs/read.c | 24 -
fs/nfs/write.c | 38 +-
fs/no-block.c | 22 +
fs/partitions/Makefile | 2
fs/proc/proc_misc.c | 11
fs/quota.c | 44 +-
fs/reiserfs/dir.c | 3
fs/reiserfs/file.c | 4
fs/reiserfs/ioctl.c | 35 ++
fs/splice.c | 2
fs/super.c | 36 ++
fs/sync.c | 113 +++++
fs/xfs/Kconfig | 1
include/asm-i386/Kbuild | 2
include/asm-ia64/mman.h | 8
include/asm-sh/page.h | 2
include/asm-sparc/mman.h | 8
include/asm-sparc64/mman.h | 8
include/linux/atmdev.h | 2
include/linux/bio.h | 2
include/linux/blkdev.h | 333 ++++++++-------
include/linux/blktrace_api.h | 3
include/linux/buffer_head.h | 19 +
include/linux/compat.h | 1
include/linux/compat_ioctl.h | 8
include/linux/elevator.h | 68 +++
include/linux/ext2_fs.h | 66 ++-
include/linux/ext3_fs.h | 26 +
include/linux/fs.h | 67 +++
include/linux/genhd.h | 4
include/linux/hrtimer.h | 1
include/linux/ktime.h | 7
include/linux/mm.h | 4
include/linux/mpage.h | 7
include/linux/nfs_fs.h | 6
include/linux/nfs_xdr.h | 4
include/linux/pci_ids.h | 2
include/linux/raid/md.h | 3
include/linux/raid/md_k.h | 3
include/linux/ramfs.h | 1
include/linux/rbtree.h | 2
include/linux/reiserfs_fs.h | 37 +-
include/linux/sched.h | 1
include/linux/sysfs.h | 9
include/linux/tty.h | 3
include/linux/writeback.h | 2
include/scsi/scsi_tcq.h | 5
init/Kconfig | 2
init/do_mounts.c | 13 +
kernel/exit.c | 1
kernel/futex.c | 84 +++-
kernel/panic.c | 2
kernel/power/Kconfig | 6
kernel/spinlock.c | 2
kernel/sys_ni.c | 5
lib/rbtree.c | 6
mm/Makefile | 4
mm/bounce.c | 302 ++++++++++++++
mm/filemap.c | 34 ++
mm/highmem.c | 281 -------------
mm/migrate.c | 4
mm/mmap.c | 17 -
mm/page-writeback.c | 143 ++++++
mm/truncate.c | 37 +-
security/seclvl.c | 4
174 files changed, 3127 insertions(+), 3080 deletions(-)
create mode 100644 fs/internal.h
create mode 100644 fs/no-block.c
create mode 100644 mm/bounce.c
--
Jens Axboe
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