SGI-PV: 953338
SGI-Modid: xfs-linux-melb:xfs-kern:26107a
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 9533338
SGI-Modid: xfs-linux-melb:xfs-kern:26106a
Signed-off-by: NNathan Scott <nathans@sgi.com>

originally by Glen.

SGI-PV: 932952
SGI-Modid: xfs-linux-melb:xfs-kern:26105a
Signed-off-by: NNathan Scott <nathans@sgi.com>

interface.

SGI-PV: 953338
SGI-Modid: xfs-linux-melb:xfs-kern:26103a
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26102a
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26101a
Signed-off-by: NNathan Scott <nathans@sgi.com>

truncate down followed by delayed allocation (buffered writes) - worst
case scenario for the notorious NULL files problem.  This reduces the
window where we are exposed to that problem significantly.

SGI-PV: 917976
SGI-Modid: xfs-linux-melb:xfs-kern:26100a
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 953338
SGI-Modid: xfs-linux-melb:xfs-kern:26099a
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26097a
Signed-off-by: NNathan Scott <nathans@sgi.com>

shutdown vop flags consistent with sync vop flags declarations too.

SGI-PV: 939911
SGI-Modid: xfs-linux-melb:xfs-kern:26096a
Signed-off-by: NNathan Scott <nathans@sgi.com>

layers.

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26095a
Signed-off-by: NNathan Scott <nathans@sgi.com>

anymore here.

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26094a
Signed-off-by: NNathan Scott <nathans@sgi.com>

init_rwsem() has no return value.  This is not a problem if init_rwsem()
is a function, but it's a problem if it's a do { ...  } while (0) macro. 
(which lockdep introduces) 

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26082a
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NArjan van de Ven <arjan@linux.intel.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NNathan Scott <nathans@sgi.com>

logged version of di_next_unlinked which is actually always stored in the
correct ondisk format. This was pointed out to us by Shailendra Tripathi.
And is evident in the xfs qa test of 121.

SGI-PV: 953263
SGI-Modid: xfs-linux-melb:xfs-kern:26044a
Signed-off-by: NTim Shimmin <tes@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

transaction completion from marking the inode dirty while it is being
cleaned up on it's way out of the system.

SGI-PV: 952967
SGI-Modid: xfs-linux-melb:xfs-kern:26040a
Signed-off-by: NDavid Chinner <dgc@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

64bit kernels allow recovery to handle both versions and do the necessary
decoding

SGI-PV: 952214
SGI-Modid: xfs-linux-melb:xfs-kern:26011a
Signed-off-by: NTim Shimmin <tes@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

transaction within each such operation may involve multiple locking of AGF
buffer. While the freeing extent function has sorted the extents based on
AGF number before entering into transaction, however, when the file system
space is very limited, the allocation of space would try every AGF to get
space allocated, this could potentially cause out-of-order locking, thus
deadlock could happen. This fix mitigates the scarce space for allocation
by setting aside a few blocks without reservation, and avoid deadlock by
maintaining ascending order of AGF locking.

SGI-PV: 947395
SGI-Modid: xfs-linux-melb:xfs-kern:210801a
Signed-off-by: NYingping Lu <yingping@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 953061
SGI-Modid: xfs-linux-melb:xfs-kern:25986a
Signed-off-by: NBarry Naujok <bnaujok@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

mmap only.

SGI-PV: 952736
SGI-Modid: xfs-linux-melb:xfs-kern:25922a
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 907752
SGI-Modid: xfs-linux-melb:xfs-kern:25921a
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 952291
SGI-Modid: xfs-linux-melb:xfs-kern:209807a
Signed-off-by: NMandy Kirkconnell <alkirkco@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

ATTR_NOLOCK flag, but this was split off some time ago, as ATTR_DMI needed
to be used separately.	Two asserts were added to guard correctness of the
code during the transition.  These are no longer required.

SGI-PV: 952145
SGI-Modid: xfs-linux-melb:xfs-kern:209633a
Signed-off-by: NOlaf Weber <olaf@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 943272
SGI-Modid: xfs-linux-melb:xfs-kern:25808a
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 943272
SGI-Modid: xfs-linux-melb:xfs-kern:25807a
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 943272
SGI-Modid: xfs-linux-melb:xfs-kern:25806a
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NNathan Scott <nathans@sgi.com>

the range spanned by modifications to the in-core extent map.  Add
XFS_BUNMAPI() and XFS_SWAP_EXTENTS() macros that call xfs_bunmapi() and
xfs_swap_extents() via the ioops vector. Change all calls that may modify
the in-core extent map for the data fork to go through the ioops vector. 
This allows a cache of extent map data to be kept in sync.

SGI-PV: 947615
SGI-Modid: xfs-linux-melb:xfs-kern:209226a
Signed-off-by: NOlaf Weber <olaf@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

AG freelist.

SGI-PV: 952681
SGI-Modid: xfs-linux-melb:xfs-kern:25902a
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 951636
SGI-Modid: xfs-linux-melb:xfs-kern:25811a
Signed-off-by: NNathan Scott <nathans@sgi.com>

with remount,ro.

SGI-PV: 951944
SGI-Modid: xfs-linux-melb:xfs-kern:25742a
Signed-off-by: NNathan Scott <nathans@sgi.com>

We need not use ->f_pos as the offset for the file input/output. If the
user passed an offset pointer in through sys_splice(), just use that and
leave ->f_pos alone.
Signed-off-by: NJens Axboe <axboe@suse.de>

Introduce GFP_NOWAIT, as an alias for GFP_ATOMIC & ~__GFP_HIGH.

This also changes XFS, which is the only in-tree user of this idiom that I
could find.  The XFS piece is compile-tested only.
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Acked-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

boundaries.

SGI-PV: 951862
SGI-Modid: xfs-linux-melb:xfs-kern:25726a
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 949858
SGI-Modid: xfs-linux-melb:xfs-kern:25717a
Signed-off-by: NJes Sorensen <jes@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

that have been unlinked, we may need to execute transactions during
reclaim. By the time the transaction has hit the disk, the linux inode and
xfs vnode may already have been freed so we can't reference them safely.
Use the known xfs inode state to determine if it is safe to reference the
vnode and linux inode during the unpin operation.

SGI-PV: 946321
SGI-Modid: xfs-linux-melb:xfs-kern:25687a
Signed-off-by: NDavid Chinner <dgc@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

millions of inodes cached and has sparse cluster population, removing
inodes from the cluster hash consumes excessive amounts of CPU time.
Reduce the CPU cost by making removal O(1) via use of a double linked list
for the hash chains.

SGI-PV: 951551
SGI-Modid: xfs-linux-melb:xfs-kern:25683a
Signed-off-by: NDavid Chinner <dgc@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

nonblock mode with the new IO path code (since 2.6.16).

SGI-PV: 951662
SGI-Modid: xfs-linux-melb:xfs-kern:25676a
Signed-off-by: NNathan Scott <nathans@sgi.com>

Thanks to kjamieson for noticing.

SGI-PV: 951661
SGI-Modid: xfs-linux-melb:xfs-kern:25675a
Signed-off-by: NNathan Scott <nathans@sgi.com>

separate out the 'internal pipe object' abstraction, and make it
usable to splice. This cleans up and fixes several aspects of the
internal splice APIs and the pipe code:

 - pipes: the allocation and freeing of pipe_inode_info is now more symmetric
   and more streamlined with existing kernel practices.

 - splice: small micro-optimization: less pointer dereferencing in splice
   methods
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Update XFS for the ->splice_read/->splice_write changes.
Signed-off-by: NJens Axboe <axboe@suse.de>

Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 912426
SGI-Modid: xfs-linux-melb:xfs-kern:25634a
Signed-off-by: NNathan Scott <nathans@sgi.com>