Eric Lee / smarc-fsl-linux-kernel

01 Mar, 2010

1 commit

  • 009d85183   GFS2: Metadata address space clean up ... Browse Code »

    Since the start of GFS2, an "extra" inode has been used to store
    the metadata belonging to each inode. The only reason for using
    this inode was to have an extra address space, the other fields
    were unused. This means that the memory usage was rather inefficient.

    The reason for keeping each inode's metadata in a separate address
    space is that when glocks are requested on remote nodes, we need to
    be able to efficiently locate the data and metadata which relating
    to that glock (inode) in order to sync or sync and invalidate it
    (depending on the remotely requested lock mode).

    This patch adds a new type of glock, which has in addition to
    its normal fields, has an address space. This applies to all
    inode and rgrp glocks (but to no other glock types which remain
    as before). As a result, we no longer need to have the second
    inode.

    This results in three major improvements:
    1. A saving of approx 25% of memory used in caching inodes
    2. A removal of the circular dependency between inodes and glocks
    3. No confusion between "normal" and "metadata" inodes in super.c

    Although the first of these is the more immediately apparent, the
    second is just as important as it now enables a number of clean
    ups at umount time. Those will be the subject of future patches.

    Signed-off-by: Steven Whitehouse

    Steven Whitehouse
     

05 Jan, 2009

1 commit

  • 37b2c8377   GFS2: Clean up & move gfs2_quotad ... Browse Code »

    This patch is a clean up of gfs2_quotad prior to giving it an
    extra job to do in addition to the current portfolio of updating
    the quota and statfs information from time to time.

    As a result it has been moved into quota.c allowing one of the
    functions it calls to be made static. Also the clean up allows
    the two existing functions to have separate timeouts and also
    to coexist with its future role of dealing with the "truncate in
    progress" inode flag.

    The (pointless) setting of gfs2_quotad_secs is removed since we
    arrange to only wake up quotad when one of the two timers expires.

    In addition the struct gfs2_quota_data is moved into a slab cache,
    mainly for easier debugging. It should also be possible to use
    a shrinker in the future, rather than the current scheme of scanning
    the quota data entries from time to time.

    Signed-off-by: Steven Whitehouse

    Steven Whitehouse
     

30 Apr, 2008

1 commit

31 Mar, 2008

2 commits

  • da755fdb4   [GFS2] Remove lm.[ch] and distribute content ... Browse Code »

    The functions in lm.c were just wrappers which were mostly
    only used in one other file. By moving the functions to
    the files where they are being used, they can be marked
    static and also this will usually result in them being inlined
    since they are often only used from one point in the code.

    A couple of really trivial functions have been inlined by hand
    into the function which called them as it makes the code clearer
    to do that.

    We also gain from one fewer function call in the glock lock and
    unlock paths.

    Signed-off-by: Steven Whitehouse

    Steven Whitehouse
     
  • 6bdd9be62   [GFS2] Allocate gfs2_rgrpd from slab memory ... Browse Code »

    This patch moves the gfs2_rgrpd structure to its own slab
    memory. This makes it easier to control and monitor, and
    yields less memory fragmentation.

    Signed-off-by: Bob Peterson
    Signed-off-by: Steven Whitehouse

    Bob Peterson
     

08 Dec, 2006

2 commits

  • 1c1afa3c0   Merge master.kernel.org:/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw ... Browse Code »

    * master.kernel.org:/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw: (73 commits)
    [DLM] Clean up lowcomms
    [GFS2] Change gfs2_fsync() to use write_inode_now()
    [GFS2] Fix indent in recovery.c
    [GFS2] Don't flush everything on fdatasync
    [GFS2] Add a comment about reading the super block
    [GFS2] Mount problem with the GFS2 code
    [GFS2] Remove gfs2_check_acl()
    [DLM] fix format warnings in rcom.c and recoverd.c
    [GFS2] lock function parameter
    [DLM] don't accept replies to old recovery messages
    [DLM] fix size of STATUS_REPLY message
    [GFS2] fs/gfs2/log.c:log_bmap() fix printk format warning
    [DLM] fix add_requestqueue checking nodes list
    [GFS2] Fix recursive locking in gfs2_getattr
    [GFS2] Fix recursive locking in gfs2_permission
    [GFS2] Reduce number of arguments to meta_io.c:getbuf()
    [GFS2] Move gfs2_meta_syncfs() into log.c
    [GFS2] Fix journal flush problem
    [GFS2] mark_inode_dirty after write to stuffed file
    [GFS2] Fix glock ordering on inode creation
    ...

    Linus Torvalds
     
  • 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 Nov, 2006

1 commit

05 Sep, 2006

2 commits

01 Sep, 2006

1 commit

  • e9fc2aa09   [GFS2] Update copyright, tidy up incore.h ... Browse Code »

    As per comments from Jan Engelhardt this
    updates the copyright message to say "version" in full rather than
    "v.2". Also incore.h has been updated to remove forward structure
    declarations which are not required.

    The gfs2_quota_lvb structure has now had endianess annotations added
    to it. Also quota.c has been updated so that we now store the
    lvb data locally in endian independant format to avoid needing
    a structure in host endianess too. As a result the endianess
    conversions are done as required at various points and thus the
    conversion routines in lvb.[ch] are no longer required. I've
    moved the one remaining constant in lvb.h thats used into lm.h
    and removed the unused lvb.[ch].

    I have not changed the HIF_ constants. That is left to a later patch
    which I hope will unify the gh_flags and gh_iflags fields of the
    struct gfs2_holder.

    Cc: Jan Engelhardt
    Signed-off-by: Steven Whitehouse

    Steven Whitehouse
     

19 May, 2006

1 commit

22 Apr, 2006

2 commits

31 Mar, 2006

1 commit

29 Mar, 2006

1 commit

  • 71b86f562   [GFS2] Further updates to dir and logging code ... Browse Code »

    This reduces the size of the directory code by about 3k and gets
    readdir() to use the functions which were introduced in the previous
    directory code update.

    Two memory allocations are merged into one. Eliminates zeroing of some
    buffers which were never used before they were initialised by
    other data.

    There is still scope for further improvement in the directory code.

    On the logging side, a hand created mutex has been replaced by a
    standard Linux mutex in the log allocation code.

    Signed-off-by: Steven Whitehouse

    Steven Whitehouse
     

18 Jan, 2006

1 commit

17 Jan, 2006

1 commit