This occurs at least in the mm/ directory, but I haven't verified
if other directories are not affected. I detected this problem
because the head of bkcvs doesn't compile anymore and shows errors
in mm/* missing symbols.

One example:

Take this changeset from Changeset,v:
-------------------------------------------------------------
1.27702
log
@[PATCH] orphaned pagecache memleak fix

Chris found that with data journaling a reiserfs pagecache may be truncate
while still pinned.  The truncation removes the page->mapping, but the page
is still listed in the VM queues because it still has buffers.  Then during
the journaling process, a buffer is marked dirty and that sets the PG_dirty
bitflag as well (in mark_buffer_dirty).  After that the page is leaked
because it's both dirty and without a mapping.

So we must allow pages without mapping and dirty to reach the PagePrivate
check.  The page->mapping will be checked again right after the PagePrivate
check.

Signed-off-by: Andrea Arcangeli <andrea@@suse.de>
Signed-off-by: Andrew Morton <akpm@@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@@osdl.org>

BKrev: 4234d7beMW4wcFI6ltxdMMhApwDmuA
-------------------------------------------------------------

Looking at
http://linux.bkbits.net:8080/linux-2.6/gnupatch@4234d7beMW4wcFI6ltxdM...
shows this changeset should contain a delta for mm/vmscan.c

However, mm/vmscan.c,v contains:
-------------------------------------------------------------
head    1.238;  
access;
symbols;
locks; strict;
comment @ * @;
expand  @o@;

1.238
date    2005.03.10.17.06.39;    author pj;      state Exp;
branches;
next    1.237;  
....
1.238
log
@cpusets - big numa cpu and memory placement

(Logical change 1.27465)
@
-------------------------------------------------------------

The 'Logical change 1.27702' is missing from the file...

Stelian.
--
Stelian Pop <stelian....@fr.alcove.com>
Alcove - http://www.alcove.com
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