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Nick Piggin b5810039a5 [PATCH] core remove PageReserved 
Remove PageReserved() calls from core code by tightening VM_RESERVED
handling in mm/ to cover PageReserved functionality.

PageReserved special casing is removed from get_page and put_page.

All setting and clearing of PageReserved is retained, and it is now flagged
in the page_alloc checks to help ensure we don't introduce any refcount
based freeing of Reserved pages.

MAP_PRIVATE, PROT_WRITE of VM_RESERVED regions is tentatively being
deprecated.  We never completely handled it correctly anyway, and is be
reintroduced in future if required (Hugh has a proof of concept).

Once PageReserved() calls are removed from kernel/power/swsusp.c, and all
arch/ and driver code, the Set and Clear calls, and the PG_reserved bit can
be trivially removed.

Last real user of PageReserved is swsusp, which uses PageReserved to
determine whether a struct page points to valid memory or not.  This still
needs to be addressed (a generic page_is_ram() should work).

A last caveat: the ZERO_PAGE is now refcounted and managed with rmap (and
thus mapcounted and count towards shared rss).  These writes to the struct
page could cause excessive cacheline bouncing on big systems.  There are a
number of ways this could be addressed if it is an issue.

Signed-off-by: Nick Piggin <npiggin@suse.de>

Refcount bug fix for filemap_xip.c

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-29 21:40:39 -07:00
..
9p [PATCH] v9fs: remove additional buffer allocation from v9fs_file_read and v9fs_file_write 2005-10-11 09:46:54 -07:00
adfs
affs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
afs [PATCH] gfp_t: fs/* 2005-10-28 08:16:47 -07:00
autofs [PATCH] autofs: fix "busy inodes after umount..." 2005-09-09 13:57:31 -07:00
autofs4
befs
bfs [PATCH] bfs iget() abuses 2005-10-04 13:22:01 -07:00
cifs [PATCH] cifs: Add support for suspend 2005-09-23 11:37:53 -07:00
coda [PATCH] Driver Core: fix up all callers of class_device_create() 2005-10-28 09:52:52 -07:00
cramfs [PATCH] fs/cramfs/uncompress.c should #include <linux/cramfs_fs.h> 2005-09-10 10:06:35 -07:00
debugfs
devfs
devpts [PATCH] Generic VFS fallback for security xattrs 2005-09-05 00:05:52 -07:00
efs
exportfs
ext2 [PATCH] Fix ext2_new_inode() failure paths 2005-09-28 07:46:40 -07:00
ext3 [PATCH] Fix ext3 warning for unused var 2005-10-28 13:57:57 -07:00
fat [PATCH] fat: fix adate 2005-09-21 10:12:18 -07:00
freevxfs [PATCH] fs: convert kcalloc to kzalloc 2005-09-07 16:57:46 -07:00
fuse [PATCH] fuse: check O_DIRECT 2005-09-30 12:41:18 -07:00
hfs [PATCH] gfp_t: fs/* 2005-10-28 08:16:47 -07:00
hfsplus [PATCH] gfp_t: fs/* 2005-10-28 08:16:47 -07:00
hostfs [PATCH] uml: remove empty hostfs_truncate method 2005-09-30 12:41:18 -07:00
hpfs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
hppfs
hugetlbfs
isofs
jbd [PATCH] gfp_t: fs/* 2005-10-28 08:16:47 -07:00
jffs [PATCH] janitor: jffs/intrep: list_for_each_entry 2005-09-10 10:06:32 -07:00
jffs2 [PATCH] jffs/jffs2: remove wrong function prototypes 2005-09-07 16:57:29 -07:00
jfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6 2005-10-28 12:44:24 -07:00
lockd [PATCH] RPC: remove xprt->nocong 2005-09-23 12:38:47 -04:00
minix [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
msdos
ncpfs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
nfs NFS: Allow files that are open for write to invalidate caches 2005-10-27 22:12:45 -04:00
nfs_common [PATCH] nfsacl: Solaris VxFS compatibility fix 2005-10-11 09:46:54 -07:00
nfsd [PATCH] nfsd4: fix setclientid unlock of unlocked state lock 2005-09-13 08:22:32 -07:00
nls
ntfs [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
openpromfs
partitions Merge ../bleed-2.6 2005-10-28 10:13:16 -07:00
proc [PATCH] mm: rss = file_rss + anon_rss 2005-10-29 21:40:38 -07:00
qnx4 [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
ramfs
reiserfs [PATCH] gfp_t: reiserfs mapping_set_gfp_mask() use 2005-10-28 08:16:51 -07:00
relayfs [PATCH] relayfs: fix bogus param value in call to vmap 2005-10-10 08:39:50 -07:00
romfs
smbfs [PATCH] fs: fix-up schedule_timeout() usage 2005-09-10 10:06:36 -07:00
sysfs
sysv [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
udf [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
ufs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
vfat
xfs [PATCH] gfp_t: fs/* 2005-10-28 08:16:47 -07:00
aio.c [PATCH] aio syscalls are not checked by lsm 2005-10-23 16:38:38 -07:00
attr.c
bad_inode.c
binfmt_aout.c [PATCH] mm: mm_init set_mm_counters 2005-10-29 21:40:38 -07:00
binfmt_elf_fdpic.c [PATCH] mm: mm_init set_mm_counters 2005-10-29 21:40:38 -07:00
binfmt_elf.c [PATCH] mm: mm_init set_mm_counters 2005-10-29 21:40:38 -07:00
binfmt_em86.c
binfmt_flat.c [PATCH] mm: mm_init set_mm_counters 2005-10-29 21:40:38 -07:00
binfmt_misc.c
binfmt_script.c
binfmt_som.c [PATCH] mm: mm_init set_mm_counters 2005-10-29 21:40:38 -07:00
bio.c [PATCH] gfp_t: fs/* 2005-10-28 08:16:47 -07:00
block_dev.c
buffer.c [PATCH] gfp_t: fs/* 2005-10-28 08:16:47 -07:00
char_dev.c
compat_ioctl.c [PATCH] usb: Patch for USBDEVFS_IOCTL from 32-bit programs 2005-10-28 16:47:46 -07:00
compat.c [COMPAT]: Fixup compat_do_execve() 2005-09-14 21:40:00 -07:00
dcache.c [PATCH] gfp_t: fs/* 2005-10-28 08:16:47 -07:00
dcookies.c
direct-io.c [PATCH] core remove PageReserved 2005-10-29 21:40:39 -07:00
dnotify.c
dquot.c [PATCH] gfp_t: fs/* 2005-10-28 08:16:47 -07:00
eventpoll.c [PATCH] epoll: handle timeout overflow 2005-09-28 07:46:41 -07:00
exec.c [PATCH] mm: rss = file_rss + anon_rss 2005-10-29 21:40:38 -07:00
fcntl.c [PATCH] files: lock-free fd look-up 2005-09-09 13:57:55 -07:00
fifo.c
file_table.c [PATCH] files: files struct with RCU 2005-09-09 13:57:55 -07:00
file.c [PATCH] Fix the fdtable freeing in the case of vmalloced fdset/arrays 2005-09-14 12:38:26 -07:00
filesystems.c
fs-writeback.c
inode.c [PATCH] gfp_t: fs/* 2005-10-28 08:16:47 -07:00
inotify.c [PATCH] inotify/idr leak fix 2005-10-23 16:38:39 -07:00
ioctl.c
ioprio.c
Kconfig [PATCH] fuse: add required version info 2005-09-28 07:46:40 -07:00
Kconfig.binfmt
libfs.c
locks.c Fix Connectathon locking test failure 2005-10-18 14:20:21 -07:00
Makefile [PATCH] FUSE - MAINTAINERS, Kconfig and Makefile changes 2005-09-09 14:03:44 -07:00
mbcache.c [PATCH] gfp_t: fs/* 2005-10-28 08:16:47 -07:00
mpage.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
namei.c VFS: Make link_path_walk set LOOKUP_CONTINUE before calling permission(). 2005-10-18 14:20:18 -07:00
namespace.c [PATCH] janitor: fs/namespace.c: list_for_each_entry 2005-09-10 10:06:32 -07:00
nfsctl.c
open.c VFS: Allow the filesystem to return a full file pointer on open intent 2005-10-18 14:20:16 -07:00
pipe.c [PATCH] sched: TASK_NONINTERACTIVE 2005-09-10 10:06:22 -07:00
posix_acl.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
quota_v1.c
quota_v2.c
quota.c
read_write.c [PATCH] readv/writev syscalls are not checked by lsm 2005-09-29 15:42:08 -07:00
readdir.c
select.c [PATCH] files: lock-free fd look-up 2005-09-09 13:57:55 -07:00
seq_file.c
stat.c
super.c
xattr_acl.c
xattr.c [PATCH] fsnotify: hook on removexattr, too 2005-09-07 16:57:27 -07:00