[XFS updates] XFS development tree branch, master, updated. v3.4-rc2-57-g14c26c6

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The branch, master has been updated
  14c26c6 xfs: add trace points for log forces
  3ba3160 xfs: fix memory reclaim deadlock on agi buffer
  ea562ed xfs: fix delalloc quota accounting on failure
      from  1307bbd2af67283131728637e9489002adb26f10 (commit)

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- Log -----------------------------------------------------------------
commit 14c26c6a05de138a4fd9a0c05ff8e7435a618324
Author: Dave Chinner <dchinner at redhat.com>
Date:   Tue Apr 24 16:33:31 2012 +1000

    xfs: add trace points for log forces
    
    To enable easy tracing of the location of log forces and the
    frequency of them via perf, add a pair of trace points to the log
    force functions.  This will help debug where excessive log forces
    are being issued from by simple perf commands like:
    
    # ~/perf/perf top -e xfs:xfs_log_force -G -U
    
    Which gives this sort of output:
    
    Events: 141  xfs:xfs_log_force
    -  100.00%  [kernel]  [k] xfs_log_force
       - xfs_log_force
            87.04% xfsaild
               kthread
               kernel_thread_helper
          - 12.87% xfs_buf_lock
               _xfs_buf_find
               xfs_buf_get
               xfs_trans_get_buf
               xfs_da_do_buf
               xfs_da_get_buf
               xfs_dir2_data_init
               xfs_dir2_leaf_addname
               xfs_dir_createname
               xfs_create
               xfs_vn_mknod
               xfs_vn_create
               vfs_create
               do_last.isra.41
               path_openat
               do_filp_open
               do_sys_open
               sys_open
               system_call_fastpath
    
    Signed-off-by: Dave Chinner <dchinner at redhat.com>
    Reviewed-by: Mark Tinguely <tinguely at sgi.com>
    Signed-off-by: Ben Myers <bpm at sig.com>

commit 3ba316037470bbf98c8a16c2179c02794fb8862e
Author: Peter Watkins <treestem at gmail.com>
Date:   Mon May 7 16:11:37 2012 -0400

    xfs: fix memory reclaim deadlock on agi buffer
    
    Note xfs_iget can be called while holding a locked agi buffer. If
    it goes into memory reclaim then inode teardown may try to lock the
    same buffer. Prevent the deadlock by calling radix_tree_preload
    with GFP_NOFS.
    
    Signed-off-by: Peter Watkins <treestem at gmail.com>
    Reviewed-by: Dave Chinner <dchinner at redhat.com>
    Signed-off-by: Ben Myers <bpm at sgi.com>

commit ea562ed6e7df5acd9392d993882c39e855099165
Author: Dave Chinner <dchinner at redhat.com>
Date:   Tue May 8 20:48:53 2012 +1000

    xfs: fix delalloc quota accounting on failure
    
    xfstest 270 was causing quota reservations way beyond what was sane
    (ten to hundreds of TB) for a 4GB filesystem. There's a sign problem
    in the error handling path of xfs_bmapi_reserve_delalloc() because
    xfs_trans_unreserve_quota_nblks() simple negates the value passed -
    which doesn't work for an unsigned variable. This causes
    reservations of close to 2^32 block instead of removing a
    reservation of a handful of blocks.
    
    Fix the same problem in the other xfs_trans_unreserve_quota_nblks()
    callers where unsigned integer variables are used, too.
    
    Signed-off-by: Dave Chinner <dchinner at redhat.com>
    Reviewed-by: Eric Sandeen <sandeen at redhat.com>
    Signed-off-by: Ben Myers <bpm at sgi.com>

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

Summary of changes:
 fs/xfs/xfs_bmap.c     |    2 +-
 fs/xfs/xfs_iget.c     |    5 +++--
 fs/xfs/xfs_iomap.c    |    2 +-
 fs/xfs/xfs_log.c      |    2 ++
 fs/xfs/xfs_trace.h    |   16 ++++++++++++++++
 fs/xfs/xfs_vnodeops.c |    2 +-
 6 files changed, 24 insertions(+), 5 deletions(-)


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