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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 04:34:11 +08:00
linux-next/Documentation/filesystems
Nick Piggin 54cb8821de mm: merge populate and nopage into fault (fixes nonlinear)
Nonlinear mappings are (AFAIKS) simply a virtual memory concept that encodes
the virtual address -> file offset differently from linear mappings.

->populate is a layering violation because the filesystem/pagecache code
should need to know anything about the virtual memory mapping.  The hitch here
is that the ->nopage handler didn't pass down enough information (ie.  pgoff).
 But it is more logical to pass pgoff rather than have the ->nopage function
calculate it itself anyway (because that's a similar layering violation).

Having the populate handler install the pte itself is likewise a nasty thing
to be doing.

This patch introduces a new fault handler that replaces ->nopage and
->populate and (later) ->nopfn.  Most of the old mechanism is still in place
so there is a lot of duplication and nice cleanups that can be removed if
everyone switches over.

The rationale for doing this in the first place is that nonlinear mappings are
subject to the pagefault vs invalidate/truncate race too, and it seemed stupid
to duplicate the synchronisation logic rather than just consolidate the two.

After this patch, MAP_NONBLOCK no longer sets up ptes for pages present in
pagecache.  Seems like a fringe functionality anyway.

NOPAGE_REFAULT is removed.  This should be implemented with ->fault, and no
users have hit mainline yet.

[akpm@linux-foundation.org: cleanup]
[randy.dunlap@oracle.com: doc. fixes for readahead]
[akpm@linux-foundation.org: build fix]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Mark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19 10:04:41 -07:00
..
configfs configfs: config item dependancies. 2007-07-10 17:18:59 -07:00
9p.txt 9p: implement optional loose read cache 2007-02-18 10:16:10 -06:00
00-INDEX 9p: implement optional loose read cache 2007-02-18 10:16:10 -06:00
adfs.txt Fix typos in /Documentation : 'U-Z' 2006-11-30 04:58:40 +01:00
affs.txt [PATCH] kernel Doc/ URL corrections 2005-11-22 09:14:30 -08:00
afs.txt [AFS]: Update the AFS fs documentation. 2007-04-26 15:57:43 -07:00
automount-support.txt VFS: Unexport do_kern_mount() and clean up simple_pin_fs() 2006-06-09 09:34:16 -04:00
befs.txt Fix typos in Documentation/: 'Q'-'R' 2006-10-03 22:54:15 +02:00
bfs.txt [PATCH] update Tigran's email addresses 2006-12-13 09:05:53 -08:00
cifs.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
coda.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cramfs.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dentry-locking.txt [PATCH] VFS: split dentry locking documentation 2005-11-07 07:53:56 -08:00
directory-locking Documentation: Fix up docs still talking about i_sem 2007-05-24 10:16:17 -07:00
dlmfs.txt Fix typos in Documentation/: 'D'-'E' 2006-10-03 22:47:42 +02:00
ecryptfs.txt eCryptfs: Move ecryptfs docs into Documentation/filesystems/ 2007-07-17 10:23:08 -07:00
Exporting Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ext2.txt Fix typos in Documentation/: 'N'-'P' 2006-10-03 22:52:05 +02:00
ext3.txt [PATCH] ext3: Add "-o bh" option 2006-06-26 09:58:20 -07:00
ext4.txt [PATCH] Documentation/filesystems/ext4.txt 2006-10-11 11:14:19 -07:00
files.txt Documentation: remove duplicated words 2006-10-03 22:57:56 +02:00
fuse.txt [PATCH] fuse: fix typo 2006-12-30 10:56:45 -08:00
gfs2.txt [GFS2] Update documentation 2006-04-25 15:44:04 -04:00
hfs.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
hpfs.txt misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
inotify.txt [PATCH] inotify (5/5): update kernel documentation 2006-06-20 05:25:19 -04:00
isofs.txt It's UTF-8 2006-03-22 00:13:35 +01:00
jfs.txt JFS: document uid, gid, and umask mount options in jfs.txt 2007-03-09 10:27:31 -06:00
Locking mm: merge populate and nopage into fault (fixes nonlinear) 2007-07-19 10:04:41 -07:00
ncpfs.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ntfs.txt misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
ocfs2.txt ocfs2: update mount option documentation 2006-12-07 17:48:41 -08:00
porting Documentation: Fix up docs still talking about i_sem 2007-05-24 10:16:17 -07:00
proc.txt handle kernelcore=: generic 2007-07-17 10:22:59 -07:00
ramfs-rootfs-initramfs.txt [PATCH] Initramfs docs update 2006-06-25 10:01:21 -07:00
relay.txt misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
romfs.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
smbfs.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
spufs.txt Fix typos in /Documentation : 'U-Z' 2006-11-30 04:58:40 +01:00
sysfs-pci.txt Fix typos concerning hierarchy 2007-02-17 19:23:03 +01:00
sysfs.txt Fix typos in Documentation/: 'D'-'E' 2006-10-03 22:47:42 +02:00
sysv-fs.txt [PATCH] fs/sysv/: doc cleanup 2006-12-07 08:39:44 -08:00
tmpfs.txt mount -t tmpfs -o mpol=: check nodes online 2007-06-08 17:23:32 -07:00
udf.txt [PATCH] Update udf documentation to reflect current state of read/write support 2006-11-16 11:43:38 -08:00
ufs.txt [PATCH] ufs2 write: mount as rw 2007-02-12 09:48:40 -08:00
vfat.txt fat: don't use free_clusters for fat32 2007-05-08 11:15:13 -07:00
vfs.txt update Documentation/filesystems/vfs.txt 2007-07-16 09:05:51 -07:00
xfs.txt [XFS] Update XFS documentation. 2005-11-03 13:46:43 +11:00
xip.txt misc doc and kconfig typos 2007-05-09 08:58:15 +02:00