Eric Lee / smarc-fsl-linux-kernel

23 Oct, 2010

1 commit

  • a2887097f   Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block ... Browse Code »

    * 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block: (46 commits)
    xen-blkfront: disable barrier/flush write support
    Added blk-lib.c and blk-barrier.c was renamed to blk-flush.c
    block: remove BLKDEV_IFL_WAIT
    aic7xxx_old: removed unused 'req' variable
    block: remove the BH_Eopnotsupp flag
    block: remove the BLKDEV_IFL_BARRIER flag
    block: remove the WRITE_BARRIER flag
    swap: do not send discards as barriers
    fat: do not send discards as barriers
    ext4: do not send discards as barriers
    jbd2: replace barriers with explicit flush / FUA usage
    jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier
    jbd: replace barriers with explicit flush / FUA usage
    nilfs2: replace barriers with explicit flush / FUA usage
    reiserfs: replace barriers with explicit flush / FUA usage
    gfs2: replace barriers with explicit flush / FUA usage
    btrfs: replace barriers with explicit flush / FUA usage
    xfs: replace barriers with explicit flush / FUA usage
    block: pass gfp_mask and flags to sb_issue_discard
    dm: convey that all flushes are processed as empty
    ...

    Linus Torvalds
     

16 Sep, 2010

1 commit

10 Sep, 2010

1 commit

29 Apr, 2010

1 commit

04 Dec, 2009

1 commit

03 Oct, 2009

1 commit

  • 492af6350   block: remove the anticipatory IO scheduler ... Browse Code »

    AS is mostly a subset of CFQ, so there's little point in still
    providing this separate IO scheduler. Hopefully at some point we
    can get down to one single IO scheduler again, at least this brings
    us closer by having only one intelligent IO scheduler.

    Signed-off-by: Jens Axboe

    Jens Axboe
     

11 Sep, 2009

1 commit

  • 5e605b64a   block: add blk-iopoll, a NAPI like approach for block devices ... Browse Code »

    This borrows some code from NAPI and implements a polled completion
    mode for block devices. The idea is the same as NAPI - instead of
    doing the command completion when the irq occurs, schedule a dedicated
    softirq in the hopes that we will complete more IO when the iopoll
    handler is invoked. Devices have a budget of commands assigned, and will
    stay in polled mode as long as they continue to consume their budget
    from the iopoll softirq handler. If they do not, the device is set back
    to interrupt completion mode.

    This patch holds the core bits for blk-iopoll, device driver support
    sold separately.

    Signed-off-by: Jens Axboe

    Jens Axboe
     

01 Jul, 2009

1 commit

  • 018e04468   block: get rid of queue-private command filter ... Browse Code »

    The initial patches to support this through sysfs export were broken
    and have been if 0'ed out in any release. So lets just kill the code
    and reclaim some space in struct request_queue, if anyone would later
    like to fixup the sysfs bits, the git history can easily restore
    the removed bits.

    Signed-off-by: Jens Axboe

    Jens Axboe
     

09 Feb, 2009

1 commit

09 Oct, 2008

2 commits

03 Jul, 2008

2 commits

  • 0b07de85a   allow userspace to modify scsi command filter on per device basis ... Browse Code »

    This patch exports the per-gendisk command filter to user space through
    sysfs, so it can be changed by the system administrator.
    All users of the old cmd filter have been converted to use the new one.

    Original patch from Peter Jones.

    Signed-off-by: Adel Gadllah
    Signed-off-by: Peter Jones
    Signed-off-by: Jens Axboe

    Adel Gadllah
     
  • 7ba1ba12e   block: Block layer data integrity support ... Browse Code »

    Some block devices support verifying the integrity of requests by way
    of checksums or other protection information that is submitted along
    with the I/O.

    This patch implements support for generating and verifying integrity
    metadata, as well as correctly merging, splitting and cloning bios and
    requests that have this extra information attached.

    See Documentation/block/data-integrity.txt for more information.

    Signed-off-by: Martin K. Petersen
    Signed-off-by: Jens Axboe

    Martin K. Petersen
     

30 Jan, 2008

4 commits

12 Oct, 2007

1 commit

10 Oct, 2007

1 commit

16 Jul, 2007

1 commit

01 Oct, 2006

1 commit

  • 9361401eb   [PATCH] BLOCK: Make it possible to disable the block layer [try #6] ... Browse Code »

    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: David Howells
    Signed-off-by: Jens Axboe

    David Howells
     

24 Mar, 2006

1 commit

04 Nov, 2005

1 commit