[GIT PULL] exofs fixes for 2.6.33-rc3

[GIT PULL] exofs fixes for 2.6.33-rc3

[Boaz Harrosh]

Linus please pull:
	git://git.open-osd.org/linux-open-osd.git for-linus

To receive the following two fixes for the 2.6.33 Kernel.

 . The first problem was found when integrating pnfs-tree with 2.6.33-rc1
 . The second problem was found by running a git-clone of a very large Linux tree
   on a memory tight system, with these new very large pack files of recent. Actually
   I think only git clone is able to produce a workload to exercise this bug.
   (up until now git has found 85% of my bugs it's my number one test. Other 15% is
    compilation of a kernel, all the synthetic tests are good for nothing)

commit 89be503021f550575fc896671b569941140b2c2e
Author: Boaz Harrosh <bharrosh@panasas.com>
Date:   Mon Dec 21 16:36:23 2009 +0200

    exofs: fix pnfs_osd re-definitions in pre-pnfs trees
    
    Some on disk exofs constants and types are defined in the pnfs_osd_xdr.h
    file. Since we needed these types before the pnfs-objects code was
    accepted to mainline we duplicated the minimal needed definitions into
    an exofs local header. The definitions where conditionally included
    depending on !CONFIG_PNFS defined. So if PNFS was present in the tree
    definitions are taken from there and if not they are defined locally.
    
    That was all good but, the CONFIG_PNFS is planed to be included upstream
    before the pnfs-objects is also included. (The first pnfs batch might be
    pnfs-files only)
    
    So condition exofs local definitions on the absence of pnfs_osd_xdr.h
    inclusion (__PNFS_OSD_XDR_H__ not defined). User code must make sure
    that in future pnfs_osd_xdr.h will be included before fs/exofs/pnfs.h,
    which happens to be so in current code.
    
    Once pnfs-objects hits mainline, exofs's local header will be removed.
    
    Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>

 fs/exofs/pnfs.h |   10 ++--------
 1 files changed, 2 insertions(+), 8 deletions(-)

commit efd124b999fb4d426b30675f1684521af0872789
Author: Boaz Harrosh <bharrosh@panasas.com>
Date:   Sun Dec 27 17:01:42 2009 +0200

    exofs: simple_write_end does not mark_inode_dirty
    
    exofs uses simple_write_end() for it's .write_end handler. But
    it is not enough because simple_write_end() does not call
    mark_inode_dirty() when it extends i_size. So even if we do
    call mark_inode_dirty at beginning of write out, with a very
    long IO and a saturated system we might get the .write_inode()
    called while still extend-writing to file and miss out on the last
    i_size updates.
    
    So override .write_end, call simple_write_end(), and afterwords if
    i_size was changed call mark_inode_dirty().
    
    It stands to logic that since simple_write_end() was the one extending
    i_size it should also call mark_inode_dirty(). But it looks like all
    users of simple_write_end() are memory-bound pseudo filesystems, who
    could careless about mark_inode_dirty(). I might submit a
    warning-comment patch to simple_write_end() in future.
    
    CC: Stable <stable@kernel.org>
    Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>

 fs/exofs/inode.c |   17 ++++++++++++++++-
 1 files changed, 16 insertions(+), 1 deletions(-)

Thanks in advance
Boaz