CONFIG_XFS_TRACE is on

SGI-PV: 956618
SGI-Modid: xfs-linux-melb:xfs-kern:27196a
Signed-off-by: NVlad Apostolov <vapo@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

Separate out the concept of "queue congestion" from "backing-dev congestion".
Congestion is a backing-dev concept, not a queue concept.

The blk_* congestion functions are retained, as wrappers around the core
backing-dev congestion functions.

This proper layering is needed so that NFS can cleanly use the congestion
functions, and so that CONFIG_BLOCK=n actually links.

Cc: "Thomas Maier" <balagi@justmail.de>
Cc: "Jens Axboe" <jens.axboe@oracle.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: David Howells <dhowells@redhat.com>
Cc: Peter Osterlund <petero2@telia.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch cleans up generic_file_*_read/write() interfaces.  Christoph
Hellwig gave me the idea for this clean ups.

In a nutshell, all filesystems should set .aio_read/.aio_write methods and use
do_sync_read/ do_sync_write() as their .read/.write methods.  This allows us
to cleanup all variants of generic_file_* routines.

Final available interfaces:

generic_file_aio_read() - read handler
generic_file_aio_write() - write handler
generic_file_aio_write_nolock() - no lock write handler

__generic_file_aio_write_nolock() - internal worker routine
Signed-off-by: NBadari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch removes readv() and writev() methods and replaces them with
aio_read()/aio_write() methods.
Signed-off-by: NBadari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch vectorizes aio_read() and aio_write() methods to prepare for
collapsing all aio & vectored operations into one interface - which is
aio_read()/aio_write().
Signed-off-by: NBadari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Cc: Michael Holzheu <HOLZHEU@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

kmem_zalloc_greedy()

SGI-PV: 956240
SGI-Modid: xfs-linux-melb:xfs-kern:26983a
Signed-off-by: NVlad Apostolov <vapo@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

The previous attempts to fix the linux inode use-after-free in xfs_iunpin
simply made the problem harder to hit. We actually need complete exclusion
between xfs_reclaim and xfs_iunpin, as well as ensuring that the i_flags
are consistent during both of these functions. Introduce a new spinlock
for exclusion and the i_flags, and fix up xfs_iunpin to use igrab before
marking the inode dirty.

SGI-PV: 952967
SGI-Modid: xfs-linux-melb:xfs-kern:26964a
Signed-off-by: NDavid Chinner <dgc@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

SGI-PV: 907752
SGI-Modid: xfs-linux-melb:xfs-kern:26925a
Signed-off-by: NEric Sandeen <sandeen@sandeen.net>
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

One sema to rule them all, one sema to find them...

SGI-PV: 907752
SGI-Modid: xfs-linux-melb:xfs-kern:26911a
Signed-off-by: NEric Sandeen <sandeen@sandeen.net>
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

SGI-PV: 955696
SGI-Modid: xfs-linux-melb:xfs-kern:26908a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

SGI-PV: 955515
SGI-Modid: xfs-linux-melb:xfs-kern:26806a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

handling.

SGI-PV: 955302
SGI-Modid: xfs-linux-melb:xfs-kern:26804a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

range.

SGI-PV: 955302
SGI-Modid: xfs-linux-melb:xfs-kern:26803a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

SGI-PV: 955302
SGI-Modid: xfs-linux-melb:xfs-kern:26802a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

buffers.

SGI-PV: 955302
SGI-Modid: xfs-linux-melb:xfs-kern:26801a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

one page.

SGI-PV: 955302
SGI-Modid: xfs-linux-melb:xfs-kern:26800a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

SGI-PV: 955302
SGI-Modid: xfs-linux-melb:xfs-kern:26749a
Signed-off-by: NEric Sandeen <sandeen@sandeen.net>
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

SGI-PV: 955302
SGI-Modid: xfs-linux-melb:xfs-kern:26746a
Signed-off-by: NEric Sandeen <sandeen@sandeen.net>
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

SGI-PV: 944409
SGI-Modid: xfs-linux-melb:xfs-kern:26603a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

SGI-PV: 954366
SGI-Modid: xfs-linux-melb:xfs-kern:26565a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

current kernels

SGI-PV: 954580
SGI-Modid: xfs-linux-melb:xfs-kern:26564a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

semantics.

SGI-PV: 954580
SGI-Modid: xfs-linux-melb:xfs-kern:26563a
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

overloaded gfp_t param.

SGI-PV: 954580
SGI-Modid: xfs-linux-melb:xfs-kern:26552a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

Avoids doing an unnecessary inode to vnode conversion and avoids a memory
allocation.

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26492a
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

analysis.

Under a sequential create+allocate workload, blktrace reported backward
writes being issued by xfsbufd, and frequent inappropriate queue unplugs.
We now insert at the tail when moving from the delwri lists to the temp
lists, which maintains correct ordering, and we avoid unplugging queues
deep in the submit paths when we'd shortly do it at a higher level anyway.
blktrace now reports much healthier write patterns from xfsbufd for this
workload (and likely many others).

SGI-PV: 954310
SGI-Modid: xfs-linux-melb:xfs-kern:26396a
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

"inode => vnode => inode" conversion, but only flags and mode of final
inode are looked at. Pass original inode instead.

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26395a
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

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: N"Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* Rougly half of callers already do it by not checking return value
* Code in drivers/acpi/osl.c does the following to be sure:

	(void)kmem_cache_destroy(cache);

* Those who check it printk something, however, slab_error already printed
  the name of failed cache.
* XFS BUGs on failed kmem_cache_destroy which is not the decision
  low-level filesystem driver should make. Converted to ignore.
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* Removing useless casts
* Removing useless wrapper
* Conversion from kmalloc+memset to kzalloc
Signed-off-by: NPanagiotis Issaris <takis@issaris.org>
Acked-by: NDave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

xfs_splice_write() failed to update the on disk inode size when extending
the so when the file was closed the range extended by splice was truncated
off. Hence any region of a file written to by splice would end up as a
hole full of zeros.

SGI-PV: 955939
SGI-Modid: xfs-linux-melb:xfs-kern:26920a
Signed-off-by: NDavid Chinner <dgc@sgi.com>
Signed-off-by: NDavid Chatterton <chatz@sgi.com>

__blockdev_direct_IO for the DIO_OWN_LOCKING case for direct I/O reads
since it drops and reacquires the i_mutex while holding the iolock and
this violates the locking order.

SGI-PV: 955696
SGI-Modid: xfs-linux-melb:xfs-kern:26898a
Signed-off-by: NLachlan McIlroy <lachlan@sgi.com>
Signed-off-by: NDavid Chatterton <chatz@sgi.com>

SGI-PV: 912426
SGI-Modid: xfs-linux-melb:xfs-kern:26622a
Signed-off-by: NNathan Scott <nathans@sgi.com>

flags from iclog buffers before submitting them for writing.

SGI-PV: 954772
SGI-Modid: xfs-linux-melb:xfs-kern:26605a
Signed-off-by: NNathan Scott <nathans@sgi.com>

Move the roundup() macro from binfmt_elf.c into linux/kernel.h as it's
generally useful.

[akpm@osdl.org: nuke all the other implementations]
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NJörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: NAdrian Bunk <bunk@stusta.de>

Same as with already do with the file operations: keep them in .rodata and
prevents people from doing runtime patching.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Cc: Steven French <sfrench@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

d_instantiate, due to fast transaction committal removing the last
remaining reference before we were all done.

SGI-PV: 953287
SGI-Modid: xfs-linux-melb:xfs-kern:26347a
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26343a
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26339a
Signed-off-by: NNathan Scott <nathans@sgi.com>

flags and   mode of final inode are looked at. Pass original inode
instead. * Two occurences of bhv_vnode_t go out.

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26298a
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>