Eric Lee / smarc-fsl-linux-kernel

04 Jan, 2012

2 commits

02 Nov, 2011

1 commit

10 May, 2011

1 commit

07 Jan, 2011

1 commit

  • fa0d7e3de   fs: icache RCU free inodes ... Browse Code »

    RCU free the struct inode. This will allow:

    - Subsequent store-free path walking patch. The inode must be consulted for
    permissions when walking, so an RCU inode reference is a must.
    - sb_inode_list_lock to be moved inside i_lock because sb list walkers who want
    to take i_lock no longer need to take sb_inode_list_lock to walk the list in
    the first place. This will simplify and optimize locking.
    - Could remove some nested trylock loops in dcache code
    - Could potentially simplify things a bit in VM land. Do not need to take the
    page lock to follow page->mapping.

    The downsides of this is the performance cost of using RCU. In a simple
    creat/unlink microbenchmark, performance drops by about 10% due to inability to
    reuse cache-hot slab objects. As iterations increase and RCU freeing starts
    kicking over, this increases to about 20%.

    In cases where inode lifetimes are longer (ie. many inodes may be allocated
    during the average life span of a single inode), a lot of this cache reuse is
    not applicable, so the regression caused by this patch is smaller.

    The cache-hot regression could largely be avoided by using SLAB_DESTROY_BY_RCU,
    however this adds some complexity to list walking and store-free path walking,
    so I prefer to implement this at a later date, if it is shown to be a win in
    real situations. I haven't found a regression in any non-micro benchmark so I
    doubt it will be a problem.

    Signed-off-by: Nick Piggin

    Nick Piggin
     

26 Oct, 2010

1 commit

  • 85fe4025c   fs: do not assign default i_ino in new_inode ... Browse Code »
    43

    Instead of always assigning an increasing inode number in new_inode
    move the call to assign it into those callers that actually need it.
    For now callers that need it is estimated conservatively, that is
    the call is added to all filesystems that do not assign an i_ino
    by themselves. For a few more filesystems we can avoid assigning
    any inode number given that they aren't user visible, and for others
    it could be done lazily when an inode number is actually needed,
    but that's left for later patches.

    Signed-off-by: Christoph Hellwig
    Signed-off-by: Dave Chinner
    Signed-off-by: Al Viro

    Christoph Hellwig
     

10 Aug, 2010

1 commit

01 Jan, 2009

1 commit

29 Apr, 2008

1 commit

08 Feb, 2008

1 commit

  • d0b079483   iget: stop FreeVXFS from using iget() and read_inode() ... Browse Code »

    Stop the FreeVXFS filesystem from using iget() and read_inode(). Replace
    vxfs_read_inode() with vxfs_iget(), and call that instead of iget().
    vxfs_iget() then uses iget_locked() directly and returns a proper error code
    instead of an inode in the event of an error.

    vxfs_fill_super() returns any error incurred when getting the root inode
    instead of EINVAL.

    [akpm@linux-foundation.org: coding-style fixes]
    Signed-off-by: David Howells
    Acked-by: Christoph Hellwig
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Howells
     

09 May, 2007

1 commit

13 Feb, 2007

1 commit

  • 754661f14   [PATCH] mark struct inode_operations const 1 ... Browse Code »

    Many struct inode_operations in the kernel can be "const". Marking them const
    moves these to the .rodata section, which avoids false sharing with potential
    dirty data. In addition it'll catch accidental writes at compile time to
    these shared resources.

    Signed-off-by: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arjan van de Ven
     

08 Dec, 2006

2 commits

  • 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
     
  • e94b17660   [PATCH] slab: remove SLAB_KERNEL ... Browse Code »

    SLAB_KERNEL is an alias of GFP_KERNEL.

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

    Christoph Lameter
     

27 Sep, 2006

2 commits

  • ba52de123   [PATCH] inode-diet: Eliminate i_blksize from the inode structure ... Browse Code »

    This eliminates the i_blksize field from struct inode. Filesystems that want
    to provide a per-inode st_blksize can do so by providing their own getattr
    routine instead of using the generic_fillattr() function.

    Note that some filesystems were providing pretty much random (and incorrect)
    values for i_blksize.

    [bunk@stusta.de: cleanup]
    [akpm@osdl.org: generic_fillattr() fix]
    Signed-off-by: "Theodore Ts'o"
    Signed-off-by: Adrian Bunk
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Theodore Ts'o
     
  • 8e18e2941   [PATCH] inode_diet: Replace inode.u.generic_ip with inode.i_private ... Browse Code »

    The following patches reduce the size of the VFS inode structure by 28 bytes
    on a UP x86. (It would be more on an x86_64 system). This is a 10% reduction
    in the inode size on a UP kernel that is configured in a production mode
    (i.e., with no spinlock or other debugging functions enabled; if you want to
    save memory taken up by in-core inodes, the first thing you should do is
    disable the debugging options; they are responsible for a huge amount of bloat
    in the VFS inode structure).

    This patch:

    The filesystem or device-specific pointer in the inode is inside a union,
    which is pretty pointless given that all 30+ users of this field have been
    using the void pointer. Get rid of the union and rename it to i_private, with
    a comment to explain who is allowed to use the void pointer. This is just a
    cleanup, but it allows us to reuse the union 'u' for something something where
    the union will actually be used.

    [judith@osdl.org: powerpc build fix]
    Signed-off-by: "Theodore Ts'o"
    Signed-off-by: Judith Lebzelter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Theodore Ts'o
     

29 Jun, 2006

1 commit

07 Nov, 2005

1 commit

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds