This is analogous to the similar check in dget(), and will make
reference-counting bugs in filesystems more immediately obvious. (I
just spent a while debugging an oops that turned out to be due to
broken fs reference counting.)
Signed-off-by: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

"[PATCH] Fix leak on /proc/lockdep_stats" fixed 5 leaks which happen if one
uses single_open() as .open function and seq_release() as .release function.

Let's add small amount of runtime checking.

Sample output is:

	memory leak: 'timer_list'
	WARNING: at fs/seq_file.c:289 seq_release()
	 [<c015e311>] seq_release+0x53/0x68
	 [<c0171bd8>] proc_reg_release+0x63/0x74
	 [<c0149877>] __fput+0x28/0xd3
	 [<c0147681>] filp_close+0x48/0x4f
	 [<c014876a>] sys_close+0x74/0xbe
	 [<c010248e>] sysenter_past_esp+0x5f/0x85
	 =======================
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

and one was sighted a couple of years ago.  No reason yet to suppose
they're prio_tree bugs, but we can't tell much about them without seeing
the vmas.

So dump vma and the one it's supposed to resemble: I had expected to use
print_hex_dump(), but that's designed for u8 dumps, whereas almost every
field of vm_area_struct is either a pointer or an unsigned long - which
look nonsense dumped as u8s.

Replace the two BUG_ONs by a single WARN_ON; and if it fires, just keep
this vma out of the tree (truncation and swapout won't be able to find it).
 How safe this is depends on what the error really is; but we hold a file's
i_mmap_lock here, so it may be impossible to recover from BUG_ON.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Jayson Santos <jaysonsantos2003@yahoo.com.br>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

potentially a quite valid value, so not restoring it would be wrong.

What *would* be interesting is to hear where the bad values came from in
the first place.  It sounds like the device state is saved after the PCI
bus controller in front of the device has been crapped on, resulting in the
PCI config cycles never reaching the device at all.

Something along this patch (together with suspend/resume debugging output)
migth help pinpoint it.  But it really sounds like something totally
brokenly turned off the PCI bridge (some ACPI shutdown crud?  I wouldn't be
entirely surprised)

Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

> I'm facing something quite strange... When booting one of these kernels
> (it's a new machine, I've not been running older kernels), the boot message
> says :
>
> ACPI: PCI Interrupt 0000:04:00.0[A] -> GSI 19 (level, low) -> IRQ 19
> sky2 v1.10 addr 0xff8fc000 irq 19 Yukon-EC (0xb6) rev 2
> sky2 eth0: addr 00:18:f3:e0:5d:d4
> ACPI: PCI Interrupt 0000:03:00.0[A] -> GSI 16 (level, low) -> IRQ 16
> sky2 v1.10 addr 0xff7fc000 irq 16 Yukon-EC (0xb6) rev 2
> sky2 eth1: addr 00:18:f3:e0:36:fd
>
> So, I'm expecting two interfaces : eth0 and eth1
>
> Unfortunately, at the end of the boot process, I can find eth1 and eth2,

Unfortunately, this patch was not applied to mainline last year.
Maybe this year.

Keep track about which network interface names were renamed after the
network device driver printed its banner.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

that would have been easier to debug if the PFN of page addresses were
available.  The dmesg output is often insufficient to find that information so
debugging patches need to be sent to the reporting user.

This patch prints out information on the memmap when it is being allocated and
the sizeof(struct page) when loglevel is set high enough.  In most
architectures, this output is produced in generic code.  x86_64 and ia64 both
setup node_mem_map in an architecture-specific manner requiring arch-specfic
changes.  Th memmap information can be used to translate any valid page
address into a PFN.  page_to_pfn() cannot be used directly in bad_page()
because there is no guarantee that the address pointer is valid in any way and
the translation can produce garbage.

Information on memmap is not printed out for the SPARSEMEM memory model.  This
only applies to FLATMEM and DISCONTIG configurations.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

- Force the feature on for now, for testing.

Cc: Al Viro <viro@ftp.linux.org.uk>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: Alexander Nyberg <alexn@telia.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Christoph Lameter <cl@linux-foundation.org>.com>
Cc: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

kernel/synchro-test.c: In function 'sched':
kernel/synchro-test.c:220: error: implicit declaration of function 'schedule'
kernel/synchro-test.c: In function 'mutexer':
kernel/synchro-test.c:227: error: implicit declaration of function 'daemonize'
kernel/synchro-test.c:228: error: implicit declaration of function 'set_user_nice'
kernel/synchro-test.c:241: error: dereferencing pointer to incomplete type
kernel/synchro-test.c: In function 'semaphorer':
kernel/synchro-test.c:263: error: dereferencing pointer to incomplete type
kernel/synchro-test.c: In function 'reader':
kernel/synchro-test.c:287: error: dereferencing pointer to incomplete type
kernel/synchro-test.c: In function 'writer':
kernel/synchro-test.c:311: error: dereferencing pointer to incomplete type
kernel/synchro-test.c: In function 'downgrader':
kernel/synchro-test.c:340: error: dereferencing pointer to incomplete type
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

semaphores and R/W semaphores.

Using it is simple:

	insmod synchro-test.ko <args>

It will exit with error ENOANO after running the tests and printing the
results to the kernel console log.

The available arguments are:

 (*) mx=N

	Start up to N mutex thrashing threads, where N is at most 20. All will
	try and thrash the same mutex.

 (*) sm=N

	Start up to N counting semaphore thrashing threads, where N is at most
	20. All will try and thrash the same semaphore.

 (*) ism=M

	Initialise the counting semaphore with M, where M is any positive
	integer greater than zero. The default is 4.

 (*) rd=N
 (*) wr=O
 (*) dg=P

	Start up to N reader thrashing threads, O writer thrashing threads and
	P downgrader thrashing threads, where N, O and P are at most 20
	apiece. All will try and thrash the same read/write semaphore.

 (*) elapse=N

	Run the tests for N seconds. The default is 5.

 (*) load=N

	Each thread delays for N uS whilst holding the lock. The dfault is 0.

 (*) interval=N

	Each thread delays for N uS whilst not holding the lock. The default
	is 0.

 (*) do_sched=1

	Each thread will call schedule if required after each iteration.

 (*) v=1

	Print more verbose information, including a thread iteration
	distribution list.

The module should be enabled by turning on CONFIG_DEBUG_SYNCHRO_TEST to "m".
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

(and reporting stacktraces to lkml) pick it up by default.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

become children of the released resource's parent?  Should they be released
too?  Should we fail the release?

I bet we have no callers who expect this right now, but with
insert_resource() we may get some.  At the point where someone hits this
BUG we can figure out what semantics we want.
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

made sense when request_resource was the main method of dividing up the
memory map.  With the increased use of insert_resource, it seems to me that
we should instead reparent the newly orphaned resources.  Before we do
that, let's make sure that nobody's actually relying on the current
semantics.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Cc: Greg KH <greg@kroah.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Cc: Edward Shishkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

This is a multi-part message in MIME format.
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Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Laurent Riffard wrote:
> Hi Edward,
>

Hello Laurent.

> This patch is buggy, isn't it ?
>

Yes, sorry, my fault..
I have sent the fixup already to the list yesterday..
Resending for you and Akpm.
Andrew, please apply.

Thanks.
Edward.

> I've got 2 reiser4 FS in my /etc/fstab:
>
> /dev/vglinux1/lvkernel-r4 /home/laurent/kernel reiser4 defaults,noatime,nodiratime,tmgr.atom_max_size=2048 0 0
> /dev/disk/by-uuid/b8dbe880-b664-49aa-8050-bddc91fd5e49 /mnt/diske reiser4 noauto,users,noatime,nodiratime 0 0
>
> The first FS can't be mounted:
>
> [  235.078342] reiser4[mount(4205)]: parse_options (fs/reiser4/init_super.c:253)[nikita-2307]:
> [  235.078345] WARNING: Unrecognized option: "tmgr.atom_max_size=2048"
>

--------------010200050204000200080203
Content-Type: text/plain;
 name="reiser4-reduce-frame-size-fix.patch"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="reiser4-reduce-frame-size-fix.patch"

. Fix up the bug in reiser4_init_super_data():
  The pointer "p" to opt_desc structure is not
  incremented.
  Pass "&p" instead of "p" to push_sb_field_opts(),
  which is supposed to increment the pointer.
. Modify macros PUSH_OPT, OPT_ARRAY_CHECK to accept
  arguments.

Signed-off-by Edward Shsihkin <edward.shishkin@gmail.com>

Add a new function push_sb_field_opts().

Signed-off-by Edward Shsihkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

```-----------020703030905060904070706
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
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```

-----------020703030905060904070706
Content-Type: text/plain;
 name="reiser4-fix-compile-warnings.patch"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="reiser4-fix-compile-warnings.patch"

Fix compile warnings.

Prepared by: Brandon Berhent <cheater1034@gmail.com>
Signed-off-by: Edward Shishkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Reiser4 steps to the journal code of other journalling file systems:

EXT3 complaints: "called recursively, non-PF_MEMALLOC"
Call Trace:
 [<c0535873>] ext3_write_inode+0x1e/0x3a
 [<c04b16bc>] __writeback_single_inode+0x193/0x2ad
 [<c0508d86>] ? flush_some_atom+0x427/0x44d
 [<c04b1bb5>] ? generic_sync_sb_inodes+0x27c/0x338
 [<c04b1b68>] generic_sync_sb_inodes+0x22f/0x338
 [<c04b1c8e>] sync_sb_inodes+0x1d/0x20
 [<c04b1e1e>] writeback_inodes+0x79/0xb9
 [<c047c76a>] balance_dirty_pages_ratelimited_nr+0x119/0x21d
 [<c0504803>] reiser4_exit_context+0x5f/0xf6
 [<c051e5a3>] reiser4_write_careful+0x3ba/0x3cc
 [<c049bc3c>] ? do_sync_read+0xab/0xe9
 [<c0613dae>] ? selinux_file_permission+0x44/0x48
 [<c060fea6>] ? security_file_permission+0xf/0x11
 [<c051e1e9>] ? reiser4_write_careful+0x0/0x3cc
 [<c049c494>] vfs_write+0x84/0xdf
 [<c049c588>] sys_write+0x3b/0x60
 [<c0403178>] sysenter_do_call+0x12/0x2d

Solution:
Drop current->journal_info before calling
balance_dirty_pages_ratelimited().

2. Update comments in plugin_header.h
Signed-off-by: Edward Shishkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

. Cleanups.
Signed-off-by: Edward Shishkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Cc: Edward Shishkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Cc: Edward Shishkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Edward Shishkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

__set_page_dirty_nobuffers() instead of intenal reiser4_set_page_dirty().

Signed-off-by: Edward Shishkin<edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Edward Shishkin<edward.shishkin@gmail.com>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

. Make quilt, checkpatch happy:
  remove comment with "joke not for everyone".

Signed-off-by: Edward Shishkin<edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

#27: FILE: fs/reiser4/plugin/item/extent_file_ops.c:1063:
+^I^I^I                   page_off + to_page,$

ERROR: code indent should use tabs where possible
#28: FILE: fs/reiser4/plugin/item/extent_file_ops.c:1064:
+^I^I^I                   PAGE_CACHE_SIZE);$

total: 2 errors, 0 warnings, 11 lines checked

./patches/reiser4-remove-simple_prepare_write-usage.patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Edward Shishkin <edward.shishkin@gmail.com>
Cc: Laurent Riffard <laurent.riffard@free.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

It's broken because reiser4_write_extent is calling
simple_prepare_write() and commit
4e02ed4b scheduled it for unexporting.
Signed-off-by: Laurent Riffard <laurent.riffard@free.fr>
Acked-by: Edward Shishkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

copies.

Signed-off-by: Edward Shishkin<edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

. add support of loop devices over cryptcompress files.
Signed-off-by: Edward Shishkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Q&A wrt this patch:

- A really short guide to how to get up and running with this filesystem.

        Reiser4 is a file system based on dancing tree algorithms, and
        is described at http://www.namesys.com.  One should be able to get it
        up and running just like any of the other filesystems supported by
        Linux.  Configure it to be compiled either builtin or as a module. 
        Create reiser4 filesystem with mkfs.reiser4, mount and use it.  More
        detailed info can be found at
        http://thebsh.namesys.com/snapshots/LATEST/READ.ME.

- The direct URL which people use to obtain the mkfs tool for this
  filesystem.  Also fsck and anything else.

        Reiser4 userland tools can be obtained at
        ftp://ftp.namesys.com/pub/reiser4progs. 
        ftp://ftp.namesys.com/pub/reiser4progs/README contains detailed
        instructions on how to compile and install these tools.  Also all
        reiser4 progs have man pages.  

- Any known shortcomings, caveats, etc.

        Reiser4 has been tested on i386 yet only.  Quota support is
        not ready yet.  Should be ready soon.  Reiser4 was tested extensively,
        and we got to where the mailing list was not able to hit any bugs, but
        then we told people that, got an order of magnitude increase in users,
        and they are able to hit bugs that we are working on now.

        Reiser's Law of Software Engineering: Each order of magnitude
        increase in users finds more bugs, in a quantity equal to the previous
        order of magnitude increase in users.  Success for software developers
        is measured by how long the frustration lasts.

        Only the very core functionality is working.  Exotic plugins,
        an API for multiple operation transactions and accessing multiple
        small files in one syscall, compression, inheritance, all have been
        postponed until after the core functionality is shipped.  The
        compression plugin needs a code review before anyone should use it.

- A statement on compatibility with reiserfs3 filesytems.

        To upgrade from reiserfs V3 to V4, use tar, or sponsor us to
        write a convertfs.

- Bear in mind that people will immediately benchmark this filesytem, and
  first impressions count.  Now is your chance to communicate any tuning
  guidelines, mount options or whatever which you'd like people to understand
  BEFORE they start publishing benchmark info.

        Reiser4 is not tuned for fsync/sync/O_SYNC performance yet.  

        If you see results that are much different from those at
        www.namesys.com/benchmarks.html, let us know.  If you see performance
        characteristics that don't quite make sense, email
        reiserfs-list@namesys.com, such things are always of interest.

        reiser4 is not tuned for mmaping and dirtying more than
        physical ram like IOzone does.  This is quite different in its code
        path from writing and dirtying more than physical ram.  There are
        those who think that what IOZone does is rarely done by real programs,
        and therefor we should not bother to optimize what it does.  All I
        know is, this month we are not optimized for it.

        Please consider its space savings when you benchmark it also.

[michal.k.k.piotrowski@gmail.com: kill #include "linux/config.h"]
[akpm@linux-foundation.org: reiser4_drop_page: don't call remove_from_page_cache]
[bunk@stusta.de: fs/reiser4/: possible cleanups]
Signed-off-by: Vladimir Saveliev <vs@namesys.com>
Signed-off-by: Hans Reiser <reiser@namesys.com>
Signed-off-by: Edward Shishkin <edward@namesys.com>
DESC
reiser4: fix for drop-unused-semaphores.patch
EDESC
Wait for tail conversion completion when acquiring exclusive access by
. mmap_unix_file()
. setattr_unix_file()
. release_unix_file()
Update comments.
Signed-off-by: Edward Shishkin <edward@namesys.com>
Cc Jonathan Briggs <jbriggs@esoft.com>
DESC
reiser4-slab-allocators-remove-slab_debug_initial-flag
EDESC
Cc: Christoph Lameter <cl@linux-foundation.org>.com>
DESC
reiser4: use simple_prepare_write to zero page data
EDESC
It's common for file systems to need to zero data on either side of a
write, if a page is not Uptodate during prepare_write.  It just so happens
that simple_prepare_write() in libfs.c does exactly that, so we can avoid
duplication and just call that function to zero page data.
Signed-off-by: Nate Diller <nate.diller@gmail.com>
Cc: Vladimir Saveliev <vs@namesys.com>
Cc: Edward Shishkin <edward@namesys.com>
DESC
reiser4-fix
EDESC

DESC
reiser4: use zero_user_page
EDESC
Use zero_user_page() instead of open-coding it.
Signed-off-by: Nate Diller <nate.diller@gmail.com>
Cc: Vladimir Saveliev <vs@namesys.com>
Cc: Edward Shishkin <edward@namesys.com>
DESC
reiser4: remove typedefs
EDESC
. Reduce number of typedefs from 289 to 248
. Remove unused file plugin/file/invert.c
. Update comments

DESC
reiser4: fix write_extent
EDESC
Prepared-by Ignatich <ignatich@gmail.com>

Fix reiser4_write_extent():
   1) handling incomplete writes missed in reiser4-temp-fix.patch
   2) bugs in the case of returned errors
Signed-off-by: Edward Shishkin <edward@namesys.com>
DESC
reiser4 make sync_inodes non-void
EDESC
Make reiser4_sync_inodes non-void
Signed-off-by: Edward Shishkin <edward@namesys.com>
DESC
Reiser4: Drop 'size' argument from bio_endio and bi_end_io
EDESC
Reiser4: Drop 'size' argument from bio_endio and bi_end_io

This patch pushes into Reiser4 the changes introduced by
commit 6712ecf8:

	As bi_end_io is only called once when the request is complete,
	the 'size' argument is now redundant.  Remove it.

	Now there is no need for bio_endio to subtract the size completed
	from bi_size.  So don't do that either.

	While we are at it, change bi_end_io to return void.
Signed-off-by: Laurent Riffard <laurent.riffard@free.fr>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Acked-by: Edward Shishkin <edward@namesys.com>
DESC
mm: clean up and kernelify shrinker registration
EDESC
I can never remember what the function to register to receive VM pressure
is called.  I have to trace down from __alloc_pages() to find it.

It's called "set_shrinker()", and it needs Your Help.

1) Don't hide struct shrinker.  It contains no magic.
2) Don't allocate "struct shrinker".  It's not helpful.
3) Call them "register_shrinker" and "unregister_shrinker".
4) Call the function "shrink" not "shrinker".
5) Reduce the 17 lines of waffly comments to 13, but document it properly.

The comment in reiser4 makes me a little queasy.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Vladimir Saveliev <vs@namesys.com>
Acked-by: Edward Shishkin <edward@namesys.com>
DESC
reiser4: fix NULL dereference in __mnt_is_readonly in ftruncate()
EDESC
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Cc: Edward Shishkin <edward@namesys.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
reiser4: fix extent2tail
EDESC
Fixed bug in extent2tail conversion.

Bug description:
when converting partially converted file
(with flag REISER4_PART_MIXED installed)
reiser4_cut_tree() starts to cut old metatada
from wrong offset. Result is data corruption.
Signed-off-by: Edward Shishkin <edward@namesys.com>
DESC
reiser4: fix read_tail
EDESC
Update hint when reading tails
Signed-off-by: Edward Shishkin <edward@namesys.com>
DESC
reiser4: fix unix-file readpages filler
EDESC
Protect page (via incrementing page count) from being reclaimed when looking
for extent pointer in unix-file specific readpages filler.
Signed-off-by: Edward Shishkin <edward@namesys.com>
DESC
reiser4: fix readpage_unix_file
EDESC
. If nominated (by VFS) page is out of file size, then fill it
  by zeros instead of returning -EINVAL (this prevents returning
  an unexpected error (-EINVAL) by some apps that don't check
  file size).

. Check if the page became uptodate while it was being unlocked.
Signed-off-by: Edward Shishkin <edward@namesys.com>
Cc: Zan Lynx <zlynx@acm.org>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
reiser4: fix for new aops patches
EDESC
Cc: Vladimir Saveliev <vs@namesys.com>
Cc: Edward Shishkin <edward@namesys.com>
DESC
reiser4: do not allocate struct file on stack
EDESC
Do not allocate struct file on stack, pass the persistent one instead.
Signed-off-by: Edward Shishkin <edward@namesys.com>
Tested-by: Zan Lynx <zlynx@acm.org>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
git-block-vs-reiser4
EDESC
Hope this is right.

Hope you know what you're doing ;)

Cc: Vladimir Saveliev <vs@namesys.com>
Cc: Edward Shishkin <edward@namesys.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
DESC
reiser4: cryptcompress misc fixups
EDESC
.  Fix a race (reproducible by fsx + sync (1)) between
  checkin_page_cluster operations: serialize them via special per-inode
  checkin_mutex (usual i_mutex is not suitable for this purpose, as
  ->writepages() also calls checkin_page_cluster();

.  Add comments for checkin/checkout technique for synchronization of
  primary and secondary caches with proof of correctness;

.  Fix missed right neighbor when updating disk clusters by
  handle_pos_on_leaf() during squalloc (should use upper levels to get
  expected non-connected neighbor);

.  Resolve a race between read and truncate (when read finds partially
  truncated and, hence, unrecoverable disk cluster) via keeping a track of
  leftmost truncated disk clusters in cryptcompress-specific part of inode;

. Introduce size translators and size modulators for
  common needs;

. Update comments;

. Rename badly sounding function names;

. Fix coding style;

. Add my part of credits.
Signed-off-by: Edward Shishkin <edward@namesys.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
reiser4: cryptcompress misc fixups-2
EDESC
Check a file plugin id before manipulating with plugin-specific counter.
Signed-off-by: Edward Shishkin <edward@namesys.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
fs/reiser4/plugin/: make 3 functions static
EDESC
This patch makes the following needlessly global functions static:
- file/cryptcompress.c: __put_page_cluster()
- file/cryptcompress.c: put_hint_cluster()
- item/ctail.c: ctail_read_disk_cluster()
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Edward Shishkin <edward@namesys.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
reiser4: change error code base
EDESC
Change REISER4_ERROR_CODE_BASE to 10000 to not overlap real errnos
Signed-off-by: Edward Shishkin <edward@namesys.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
reiser4: use lzo library functions
EDESC
. Convert Reiser4 to use lzo implementation in lib/lzo/ instead of
  including its own copy of minilzo;
. Do not set zeros to workmem region.
Signed-off-by: Edward Shishkin <edward@namesys.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
fs/reiser4/plugin/file/cryptcompress.c: kmalloc + memset conversion to kzalloc
EDESC
 fs/reiser4/plugin/file/cryptcompress.c | 101386 -> 101352 (-34 bytes)
 fs/reiser4/plugin/file/cryptcompress.o | 456784 -> 456644 (-140 bytes)
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: Edward Shishkin <edward@namesys.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
reiser4: kmalloc + memset conversion to kzalloc
EDESC
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: Edward Shishkin <edward@namesys.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
fs/reiser4/init_super.c: kmalloc + memset conversion to kzalloc
EDESC
 fs/reiser4/init_super.c | 19283 -> 19246 (-37 bytes)
 fs/reiser4/init_super.o | 155348 -> 155152 (-196 bytes)
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: Edward Shishkin <edward@namesys.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
fs/reiser4/plugin/inode_ops_rename.c: kmalloc + memset conversion to kzalloc
EDESC
 fs/reiser4/plugin/inode_ops_rename.c | 28474 -> 28344 (-130 bytes)
 fs/reiser4/plugin/inode_ops_rename.o | 142600 -> 142476 (-124 bytes)
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: Edward Shishkin <edward@namesys.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
fs/reiser4/ktxnmgrd.c: kmalloc + memset conversion to kzalloc
EDESC
 fs/reiser4/ktxnmgrd.c | 5314 -> 5277 (-37 bytes)
 fs/reiser4/ktxnmgrd.o | 131624 -> 131496 (-128 bytes)
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: Edward Shishkin <edward@namesys.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
DESC
Use helpers to obtain task pid in printks
EDESC
The task_struct->pid member is going to be deprecated, so start
using the helpers (task_pid_nr/task_pid_vnr/task_pid_nr_ns) in
the kernel.

The first thing to start with is the pid, printed to dmesg - in
this case we may safely use task_pid_nr(). Besides, printks produce
more (much more) than a half of all the explicit pid usage.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
DESC
Subject: [PATCH 1/2] remove asm/bitops.h includes
EDESC
remove asm/bitops.h includes

including asm/bitops directly may cause compile errors. don't include it
and include linux/bitops instead. next patch will deny including asm header
directly.

Cc: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>

Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

add_to_page_cache_lru to be EXPORT_SYMBOL-ed.

[bunk@stusta.de: unexport {,__}remove_from_page_cache]
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

generic implementaion and changes fs-writeback.c:sync_sb_inodes() to call
filesystem's sync_inodes if it is defined or generic implementaion otherwise.
This new operation allows filesystem to decide itself what to flush.

Reiser4 flushes dirty pages on basic of atoms, not of inodes.  sync_sb_inodes
used to call address space flushing method (writepages) for every dirty inode.
 For reiser4 it caused having to commit atoms unnecessarily often.  This
turned into substantial slowdown.  Having this method helped to fix that
problem.

akpm: this patch needs to be chnaged to remove the `sb' arg.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Cc: Edward Shishkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

"captured" by some atom.  However, outside reiser4 context dirty page can
not be captured in some cases, as it is accompanied with specific work
(jnode creation, etc).  Reiser4 recognizes such "anonymous" pages (i.e. 
pages that were dirtied outside of reiser4) by the tag
PAGECACHE_TAG_DIRTY.  Pages dirtied inside reiser4 context are not tagged
at all: we don't need this.  Indeed, once page is dirtied and captured, it
is attached to a jnode (a special header to keep a track of transactions).

reiser4_set_page_dirty_internal() was the internal reiser4 function that
set dirty bit without tagging the page.  Having such internal function led
to real problems (incorrect task io accounting, etc.  because of not
updating this internal "friend").

Solution:

The following patch adds a core library function that sets a dirty bit
without tagging the page.

Signed-off-by: Edward Shishkin<edward.shishkin@gmail.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Cc: David S. Miller <davem@davemloft.net>
Cc: Florian Fainelli <florian@openwrt.org>
Cc: Julius Volz <juliusv@google.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Simon Horman <horms@verge.net.au>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

lib/gcd.c, the latter also implementing the a < b case.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Takashi Iwai <tiwai@suse.de>
Acked-by: Simon Horman <horms@verge.net.au>
Cc: Julius Volz <juliusv@google.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>