[XFS updates] XFS development tree branch, for-next, updated. v3.9-rc1-16-gff9a28f

Fri Mar 22 16:17:54 CDT 2013

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The branch, for-next has been updated
  ff9a28f xfs: Fix WARN_ON(delalloc) in xfs_vm_releasepage()
  19cb7e3 xfs: xfs_iomap_prealloc_size() tracepoint
  76a4202 xfs: add quota-driven speculative preallocation throttling
  b136645 xfs: xfs_dquot prealloc throttling watermarks and low free space
  4b6eae2e xfs: pass xfs_dquot to xfs_qm_adjust_dqlimits() instead of xfs_disk_dquot_t
  c9bdbdc xfs: push rounddown_pow_of_two() to after prealloc throttle
  3c58b5f xfs: reorganize xfs_iomap_prealloc_size to remove indentation
      from  56cea2d088811b8cf7d2893e29bcf369a912de69 (commit)

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commit ff9a28f6c25d18a635abcab1f49db68108203dfb
Author: Jan Kara <jack at suse.cz>
Date:   Thu Mar 14 14:30:54 2013 +0100

    xfs: Fix WARN_ON(delalloc) in xfs_vm_releasepage()

    When a dirty page is truncated from a file but reclaim gets to it before
    truncate_inode_pages(), we hit WARN_ON(delalloc) in
    xfs_vm_releasepage(). This is because reclaim tries to write the page,
    xfs_vm_writepage() just bails out (leaving page clean) and thus reclaim
    thinks it can continue and calls xfs_vm_releasepage() on page with dirty
    buffers.

    Fix the issue by redirtying the page in xfs_vm_writepage(). This makes
    reclaim stop reclaiming the page and also logically it keeps page in a
    more consistent state where page with dirty buffers has PageDirty set.

    Signed-off-by: Jan Kara <jack at suse.cz>
    Reviewed-by: Carlos Maiolino <cmaiolino at redhat.com>
    Signed-off-by: Ben Myers <bpm at sgi.com>

commit 19cb7e3854c9afe2ee968cbdd92293ec09e43bf3
Author: Brian Foster <bfoster at redhat.com>
Date:   Mon Mar 18 10:51:48 2013 -0400

    xfs: xfs_iomap_prealloc_size() tracepoint

    Add a tracepoint to provide some feedback on preallocation size
    calculation.

    Signed-off-by: Brian Foster <bfoster at redhat.com>
    Reviewed-by: Mark Tinguely <tinguely at sgi.com>
    Signed-off-by: Ben Myers <bpm at sgi.com>

commit 76a4202a388690e664668c4f668ee12d709100b3
Author: Brian Foster <bfoster at redhat.com>
Date:   Mon Mar 18 10:51:47 2013 -0400

    xfs: add quota-driven speculative preallocation throttling

    Introduce the need_throttle() and calc_throttle() functions to
    independently check whether throttling is required for a particular
    dquot and if so, calculate the associated throttling metrics based
    on the state of the quota. We use the same general algorithm to
    calculate the throttle shift as for global free space with the
    exception of using three stages rather than five.

    Update xfs_iomap_prealloc_size() to use the smallest available
    prealloc size based on each of the constraints and apply the
    maximum shift to obtain the throttled preallocation size.

    Signed-off-by: Brian Foster <bfoster at redhat.com>
    Reviewed-by: Mark Tinguely <tinguely at sgi.com>
    Signed-off-by: Ben Myers <bpm at sgi.com>

commit b136645116e5471cf0b037a1759dc83620236631
Author: Brian Foster <bfoster at redhat.com>
Date:   Mon Mar 18 10:51:46 2013 -0400

    xfs: xfs_dquot prealloc throttling watermarks and low free space

    Enable tracking of high and low watermarks for preallocation
    throttling of files under quota restrictions. These values are
    calculated when the quota limit is read from disk or modified and
    cached for later use by the throttling algorithm.

    The high watermark specifies when preallocation is disabled, the
    low watermark specifies when throttling is enabled and the low free
    space data structure contains precalculated low free space limits
    to serve as input to determine the level of throttling required.

    Note that the low free space data structure is based on the
    existing global low free space data structure with the exception of
    using three stages (5%, 3% and 1%) rather than five to reduce the
    impact of xfs_dquot memory overhead.

    Signed-off-by: Brian Foster <bfoster at redhat.com>
    Reviewed-by: Mark Tinguely <tinguely at sgi.com>
    Signed-off-by: Ben Myers <bpm at sgi.com>

commit 4b6eae2e6ac8a6671839ccaea1c2e3dd5684f5df
Author: Brian Foster <bfoster at redhat.com>
Date:   Mon Mar 18 10:51:45 2013 -0400

    xfs: pass xfs_dquot to xfs_qm_adjust_dqlimits() instead of xfs_disk_dquot_t

    Modify xfs_qm_adjust_dqlimits() to take the xfs_dquot as a
    parameter instead of just the xfs_disk_dquot_t so we can update
    in-memory fields if necessary.

    Signed-off-by: Brian Foster <bfoster at redhat.com>
    Reviewed-by: Mark Tinguely <tinguely at sgi.com>
    Signed-off-by: Ben Myers <bpm at sgi.com>

commit c9bdbdc0741d90908f492415c890b630f43f17f8
Author: Brian Foster <bfoster at redhat.com>
Date:   Mon Mar 18 10:51:44 2013 -0400

    xfs: push rounddown_pow_of_two() to after prealloc throttle

    The round down occurs towards the beginning of the function. Push
    it down after throttling has occurred. This is to support adding
    further transformations to 'alloc_blocks' that might not preserve
    power-of-two alignment (and thus could lead to rounding down
    multiple times).

    Signed-off-by: Brian Foster <bfoster at redhat.com>
    Reviewed-by: Ben Myers <bpm at sgi.com>
    Reviewed-by: Mark Tinguely <tinguely at sgi.com>
    Signed-off-by: Ben Myers <bpm at sgi.com>

commit 3c58b5f809eda8ae8d891b7a87d0a235ab0f9bf5
Author: Brian Foster <bfoster at redhat.com>
Date:   Mon Mar 18 10:51:43 2013 -0400

    xfs: reorganize xfs_iomap_prealloc_size to remove indentation

    The majority of xfs_iomap_prealloc_size() executes within the
    check for lack of default I/O size. Reverse the logic to remove the
    extra indentation.

    Signed-off-by: Brian Foster <bfoster at redhat.com>
    Reviewed-by: Dave Chinner <dchinner at redhat.com>
    Reviewed-by: Ben Myers <bpm at sgi.com>
    Reviewed-by: Mark Tinguely <tinguely at sgi.com>
    Signed-off-by: Ben Myers <bpm at sgi.com>

-----------------------------------------------------------------------

Summary of changes:
 fs/xfs/xfs_aops.c        |  12 ++--
 fs/xfs/xfs_dquot.c       |  48 ++++++++++++--
 fs/xfs/xfs_dquot.h       |  16 ++++-
 fs/xfs/xfs_iomap.c       | 161 ++++++++++++++++++++++++++++++++++++++---------
 fs/xfs/xfs_qm.c          |   2 +-
 fs/xfs/xfs_qm.h          |   2 +-
 fs/xfs/xfs_qm_syscalls.c |   9 +--
 fs/xfs/xfs_trace.h       |  24 +++++++
 fs/xfs/xfs_trans_dquot.c |  10 +--
 9 files changed, 230 insertions(+), 54 deletions(-)

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