Eric Lee / smarc-fsl-linux-kernel

07 Jan, 2012

1 commit

04 Jan, 2012

1 commit

  • 6b520e056   vfs: fix the stupidity with i_dentry in inode destructors ... Browse Code »

    Seeing that just about every destructor got that INIT_LIST_HEAD() copied into
    it, there is no point whatsoever keeping this INIT_LIST_HEAD in inode_init_once();
    the cost of taking it into inode_init_always() will be negligible for pipes
    and sockets and negative for everything else. Not to mention the removal of
    boilerplate code from ->destroy_inode() instances...

    Signed-off-by: Al Viro

    Al Viro
     

02 Nov, 2011

1 commit

21 Jul, 2011

1 commit

  • bd5fe6c5e   fs: kill i_alloc_sem ... Browse Code »

    i_alloc_sem is a rather special rw_semaphore. It's the last one that may
    be released by a non-owner, and it's write side is always mirrored by
    real exclusion. It's intended use it to wait for all pending direct I/O
    requests to finish before starting a truncate.

    Replace it with a hand-grown construct:

    - exclusion for truncates is already guaranteed by i_mutex, so it can
    simply fall way
    - the reader side is replaced by an i_dio_count member in struct inode
    that counts the number of pending direct I/O requests. Truncate can't
    proceed as long as it's non-zero
    - when i_dio_count reaches non-zero we wake up a pending truncate using
    wake_up_bit on a new bit in i_flags
    - new references to i_dio_count can't appear while we are waiting for
    it to read zero because the direct I/O count always needs i_mutex
    (or an equivalent like XFS's i_iolock) for starting a new operation.

    This scheme is much simpler, and saves the space of a spinlock_t and a
    struct list_head in struct inode (typically 160 bits on a non-debug 64-bit
    system).

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

    Christoph Hellwig
     

31 Mar, 2011

1 commit

25 Mar, 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
     

10 Aug, 2010

2 commits

  • b57922d97   convert remaining ->clear_inode() to ->evict_inode() ... Browse Code »

    Signed-off-by: Al Viro

    Al Viro
     
  • 1025774ce   remove inode_setattr ... Browse Code »

    Replace inode_setattr with opencoded variants of it in all callers. This
    moves the remaining call to vmtruncate into the filesystem methods where it
    can be replaced with the proper truncate sequence.

    In a few cases it was obvious that we would never end up calling vmtruncate
    so it was left out in the opencoded variant:

    spufs: explicitly checks for ATTR_SIZE earlier
    btrfs,hugetlbfs,logfs,dlmfs: explicitly clears ATTR_SIZE earlier
    ufs: contains an opencoded simple_seattr + truncate that sets the filesize just above

    In addition to that ncpfs called inode_setattr with handcrafted iattrs,
    which allowed to trim down the opencoded variant.

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

    Christoph Hellwig
     

06 Mar, 2010

1 commit

  • a9185b41a   pass writeback_control to ->write_inode ... Browse Code »

    This gives the filesystem more information about the writeback that
    is happening. Trond requested this for the NFS unstable write handling,
    and other filesystems might benefit from this too by beeing able to
    distinguish between the different callers in more detail.

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

    Christoph Hellwig
     

18 Dec, 2009

1 commit

  • eaff8079d   kill I_LOCK ... Browse Code »

    After I_SYNC was split from I_LOCK the leftover is always used together with
    I_NEW and thus superflous.

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

    Christoph Hellwig
     

17 Jun, 2009

1 commit

01 Apr, 2009

1 commit

06 Jan, 2009

1 commit

13 Oct, 2007

1 commit

  • bfab36e81   NTFS: Fix a mount time deadlock. ... Browse Code »

    Big thanks go to Mathias Kolehmainen for reporting the bug, providing
    debug output and testing the patches I sent him to get it working.

    The fix was to stop calling ntfs_attr_set() at mount time as that causes
    balance_dirty_pages_ratelimited() to be called which on systems with
    little memory actually tries to go and balance the dirty pages which tries
    to take the s_umount semaphore but because we are still in fill_super()
    across which the VFS holds s_umount for writing this results in a
    deadlock.

    We now do the dirty work by hand by submitting individual buffers. This
    has the annoying "feature" that mounting can take a few seconds if the
    journal is large as we have clear it all. One day someone should improve
    on this by deferring the journal clearing to a helper kernel thread so it
    can be done in the background but I don't have time for this at the moment
    and the current solution works fine so I am leaving it like this for now.

    Signed-off-by: Anton Altaparmakov
    Signed-off-by: Linus Torvalds

    Anton Altaparmakov
     

31 May, 2007

1 commit

09 May, 2007

1 commit

18 Jan, 2007

1 commit

08 Dec, 2006

1 commit

01 Oct, 2006

1 commit

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
     
  • f52720ca5   [PATCH] fs: Removing useless casts ... Browse Code »

    * Removing useless casts
    * Removing useless wrapper
    * Conversion from kmalloc+memset to kzalloc

    Signed-off-by: Panagiotis Issaris
    Acked-by: Dave Kleikamp
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Panagiotis Issaris
     

04 Jul, 2006

1 commit

  • 593453747   [PATCH] lockdep: annotate NTFS locking rules ... Browse Code »

    NTFS uses lots of type-opaque objects which acquire their true identity
    runtime - so the lock validator needs to be helped in a couple of places to
    figure out object types.

    Many thanks to Anton Altaparmakov for giving lots of explanations about NTFS
    locking rules.

    Has no effect on non-lockdep kernels.

    Signed-off-by: Ingo Molnar
    Signed-off-by: Anton Altaparmakov
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ingo Molnar
     

24 Mar, 2006

3 commits

23 Mar, 2006

1 commit

24 Feb, 2006

1 commit

11 Jan, 2006

1 commit

  • 870f48179   [PATCH] replace inode_update_time with file_update_time ... Browse Code »

    To allow various options to work per-mount instead of per-sb we need a
    struct vfsmount when updating ctime and mtime. This preparation patch
    replaces the inode_update_time routine with a file_update_atime routine so
    we can easily get at the vfsmount. (and the file makes more sense in this
    context anyway). Also get rid of the unused second argument - we always
    want to update the ctime when calling this routine.

    Signed-off-by: Christoph Hellwig
    Cc: Al Viro
    Cc: Anton Altaparmakov
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Hellwig
     

10 Jan, 2006

1 commit

04 Oct, 2005

2 commits

19 Sep, 2005

1 commit

09 Sep, 2005

2 commits

27 May, 2005

1 commit

05 May, 2005

4 commits