Eric Lee / smarc-fsl-linux-kernel

11 Jul, 2007

2 commits

27 Apr, 2007

6 commits

  • 834189788   ocfs2: Cache extent records ... Browse Code »

    The extent map code was ripped out earlier because of an inability to deal
    with holes. This patch adds back a simpler caching scheme requiring far less
    code.

    Our old extent map caching was designed back when meta data block caching in
    Ocfs2 didn't work very well, resulting in many disk reads. These days our
    metadata caching is much better, resulting in no un-necessary disk reads. As
    a result, extent caching doesn't have to be as fancy, nor does it have to
    cache as many extents. Keeping the last 3 extents seen should be sufficient
    to give us a small performance boost on some streaming workloads.

    Signed-off-by: Mark Fasheh

    Mark Fasheh
     
  • 4f902c377   ocfs2: Fix extent lookup to return true size of holes ... Browse Code »

    Initially, we had wired things to return a size '1' of holes. Cook up a
    small amount of code to find the next extent and calculate the number of
    clusters between the virtual offset and the next allocated extent.

    Signed-off-by: Mark Fasheh

    Mark Fasheh
     
  • 49cb8d2d4   ocfs2: Read from an unwritten extent returns zeros ... Browse Code »

    Return an optional extent flags field from our lookup functions and wire up
    callers to treat unwritten regions as holes for the purpose of returning
    zeros to the user.

    Signed-off-by: Mark Fasheh

    Mark Fasheh
     
  • e48edee2d   ocfs2: make room for unwritten extents flag ... Browse Code »

    Due to the size of our group bitmaps, we'll never have a leaf node extent
    record with more than 16 bits worth of clusters. Split e_clusters up so that
    leaf nodes can get a flags field where we can mark unwritten extents.
    Interior nodes whose length references all the child nodes beneath it can't
    split their e_clusters field, so we use a union to preserve sizing there.

    Signed-off-by: Mark Fasheh

    Mark Fasheh
     
  • 9517bac6c   ocfs2: teach ocfs2_file_aio_write() about sparse files ... Browse Code »

    Unfortunately, ocfs2 can no longer make use of generic_file_aio_write_nlock()
    because allocating writes will require zeroing of pages adjacent to the I/O
    for cluster sizes greater than page size.

    Implement a custom file write here, which can order page locks for zeroing.
    This also has the advantage that cluster locks can easily be ordered outside
    of the page locks.

    Signed-off-by: Mark Fasheh

    Mark Fasheh
     
  • 363041a5f   ocfs2: temporarily remove extent map caching ... Browse Code »

    The code in extent_map.c is not prepared to deal with a subtree being
    rotated between lookups. This can happen when filling holes in sparse files.
    Instead of a lengthy patch to update the code (which would likely lose the
    benefit of caching subtree roots), we remove most of the algorithms and
    implement a simple path based lookup. A less ambitious extent caching scheme
    will be added in a later patch.

    Signed-off-by: Mark Fasheh

    Mark Fasheh
     

08 Dec, 2006

1 commit

  • e18b890bb   [PATCH] slab: remove kmem_cache_t ... Browse Code »

    Replace all uses of kmem_cache_t with struct kmem_cache.

    The patch was generated using the following script:

    #!/bin/sh
    #
    # Replace one string by another in all the kernel sources.
    #

    set -e

    for file in `find * -name "*.c" -o -name "*.h"|xargs grep -l $1`; do
    quilt add $file
    sed -e "1,\$s/$1/$2/g" $file >/tmp/$$
    mv /tmp/$$ $file
    quilt refresh
    done

    The script was run like this

    sh replace kmem_cache_t "struct kmem_cache"

    Signed-off-by: Christoph Lameter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Lameter
     

30 Jun, 2006

1 commit

18 May, 2006

1 commit

25 Mar, 2006

1 commit

02 Mar, 2006

1 commit

04 Feb, 2006

2 commits

04 Jan, 2006

1 commit