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Matthew Wilcox 73a6ec47f6 dax: ensure that zero pages are removed from other processes 
If the first access to a huge page was a store, there would be no existing
zero pmd in this process's page tables.  There could be a zero pmd in
another process's page tables, if it had done a load.  We can detect this
case by noticing that the buffer_head returned from the filesystem is New,
and ensure that other processes mapping this huge page have their page
tables flushed.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Reported-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-08 15:35:28 -07:00
..
9p
9p: fix return code of read() when count is 0
2015-08-23 14:21:36 -05:00
adfs
fs/adfs: remove unneeded cast
2015-06-30 19:44:57 -07:00
affs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-07-04 19:36:06 -07:00
afs
net: Add a struct net parameter to sock_create_kern
2015-05-11 10:50:17 -04:00
autofs4
make simple_positive() public
2015-06-23 18:02:01 -04:00
befs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-07-04 19:36:06 -07:00
bfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
btrfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-09-05 20:34:28 -07:00
cachefiles
Merge branch 'fscache-fixes' into for-next
2015-06-23 18:01:30 -04:00
ceph
fs: create and use seq_show_option for escaping
2015-09-04 16:54:41 -07:00
cifs
fs: create and use seq_show_option for escaping
2015-09-04 16:54:41 -07:00
coda
fs: cleanup slight list_entry abuse
2015-06-23 18:01:59 -04:00
configfs
configfs: fix kernel infoleak through user-controlled format string
2015-07-17 16:39:53 -07:00
cramfs
…
debugfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-07-04 19:36:06 -07:00
devpts
devpts: if initialization failed, don't crash when opening /dev/ptmx
2015-06-30 19:44:58 -07:00
dlm
dlm for 4.3
2015-09-03 12:57:48 -07:00
ecryptfs
treewide: Fix typo in printk
2015-08-07 13:58:05 +02:00
efivarfs
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-05-06 10:57:37 -07:00
efs
fs/efs: femove unneeded cast
2015-06-25 17:00:42 -07:00
exofs
pagemap.h: move dir_pages() over there
2015-06-23 18:02:00 -04:00
exportfs
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
2015-02-22 11:38:41 -05:00
ext2
ext2: huge page fault support
2015-09-08 15:35:28 -07:00
ext4
ext4: start transaction before calling into DAX
2015-09-08 15:35:28 -07:00
f2fs
Merge tag 'for-f2fs-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
2015-09-03 13:10:22 -07:00
fat
writeback: separate out include/linux/backing-dev-defs.h
2015-06-02 08:33:34 -06:00
freevxfs
freevxfs: Grammar s/an negative/a negative/
2015-08-07 13:59:24 +02:00
fscache
FS-Cache: Retain the netfs context in the retrieval op earlier
2015-04-02 14:28:53 +01:00
fuse
fs/fuse: fix ioctl type confusion
2015-08-16 12:35:44 -07:00
gfs2
fs: create and use seq_show_option for escaping
2015-09-04 16:54:41 -07:00
hfs
fs: create and use seq_show_option for escaping
2015-09-04 16:54:41 -07:00
hfsplus
fs: create and use seq_show_option for escaping
2015-09-04 16:54:41 -07:00
hostfs
fs: create and use seq_show_option for escaping
2015-09-04 16:54:41 -07:00
hpfs
hpfs: update ctime and mtime on directory modification
2015-09-03 11:55:30 -07:00
hugetlbfs
ipc: use private shmem or hugetlbfs inodes for shm segments.
2015-08-07 04:39:41 +03:00
isofs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
jbd2
jbd2: limit number of reserved credits
2015-08-04 11:21:52 -04:00
jffs2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-07-04 19:36:06 -07:00
jfs
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2015-09-03 12:28:30 -07:00
kernfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2015-07-03 15:20:57 -07:00
lockd
lockd: NLM grace period shouldn't block NFSv4 opens
2015-08-13 10:22:06 -04:00
logfs
block: remove bio_get_nr_vecs()
2015-08-13 12:32:04 -06:00
minix
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-07-04 19:36:06 -07:00
ncpfs
ncpfs: successful rename() should invalidate caches for parents
2015-06-14 11:31:39 -04:00
nfs
NFS client updates for Linux 4.3
2015-09-07 14:02:24 -07:00
nfs_common
lockd: NLM grace period shouldn't block NFSv4 opens
2015-08-13 10:22:06 -04:00
nfsd
NFS client updates for Linux 4.3
2015-09-07 14:02:24 -07:00
nilfs2
block: remove bio_get_nr_vecs()
2015-08-13 12:32:04 -06:00
nls
…
notify
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-09-05 20:34:28 -07:00
ntfs
ntfs: delete unnecessary checks before calling iput()
2015-09-04 16:54:41 -07:00
ocfs2
fs: create and use seq_show_option for escaping
2015-09-04 16:54:41 -07:00
omfs
omfs: fix potential integer overflow in allocator
2015-05-28 18:25:19 -07:00
openpromfs
…
overlayfs
fs: create and use seq_show_option for escaping
2015-09-04 16:54:41 -07:00
proc
userfaultfd: add VM_UFFD_MISSING and VM_UFFD_WP
2015-09-04 16:54:41 -07:00
pstore
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2015-07-03 15:20:57 -07:00
qnx4
…
qnx6
pagemap.h: move dir_pages() over there
2015-06-23 18:02:00 -04:00
quota
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-09-05 20:34:28 -07:00
ramfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
reiserfs
fs: create and use seq_show_option for escaping
2015-09-04 16:54:41 -07:00
romfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
squashfs
fs: cleanup slight list_entry abuse
2015-06-23 18:01:59 -04:00
sysfs
vfs: Commit to never having exectuables on proc and sysfs.
2015-07-10 10:39:25 -05:00
sysv
pagemap.h: move dir_pages() over there
2015-06-23 18:02:00 -04:00
tracefs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-07-04 19:36:06 -07:00
ubifs
This pull request includes the following UBI/UBIFS changes:
2015-06-25 14:11:34 -07:00
udf
udf: Don't modify filesystem for read-only mounts
2015-08-20 14:58:35 +02:00
ufs
ufs_inode_get{frag,block}(): get rid of 'phys' argument
2015-07-06 17:40:05 -04:00
xfs
xfs: huge page fault support
2015-09-08 15:35:28 -07:00
aio.c
mm: move ->mremap() from file_operations to vm_operations_struct
2015-09-04 16:54:41 -07:00
anon_inodes.c
…
attr.c
…
bad_inode.c
don't bother with most of the bad_file_ops methods
2015-02-20 04:03:58 -05:00
binfmt_aout.c
…
binfmt_elf_fdpic.c
…
binfmt_elf.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-07-04 19:36:06 -07:00
binfmt_em86.c
…
binfmt_flat.c
…
binfmt_misc.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
binfmt_script.c
…
block_dev.c
dax: move DAX-related functions to a new header
2015-09-08 15:35:28 -07:00
buffer.c
fs: use helper bio_add_page() instead of open coding on bi_io_vec
2015-08-13 12:32:00 -06:00
char_dev.c
fs/char_dev.c: fix incorrect documentation for unregister_chrdev_region
2015-08-05 13:49:35 -07:00
compat_binfmt_elf.c
…
compat_ioctl.c
ioctl_compat: handle FITRIM
2015-07-09 11:42:21 -07:00
compat.c
…
coredump.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-07-04 19:36:06 -07:00
dax.c
dax: ensure that zero pages are removed from other processes
2015-09-08 15:35:28 -07:00
dcache.c
dcache: Reduce the scope of i_lock in d_splice_alias
2015-08-21 02:34:37 -04:00
dcookies.c
…
direct-io.c
block: remove bio_get_nr_vecs()
2015-08-13 12:32:04 -06:00
drop_caches.c
inode: convert inode_sb_list_lock to per-sb
2015-08-17 18:39:46 -04:00
eventfd.c
eventfd: don't take the spinlock in eventfd_poll
2015-02-17 14:34:52 -08:00
eventpoll.c
epoll: optimize setting task running after blocking
2015-02-13 21:21:40 -08:00
exec.c
vfs: Commit to never having exectuables on proc and sysfs.
2015-07-10 10:39:25 -05:00
fcntl.c
…
fhandle.c
vfs: read file_handle only once in handle_to_path
2015-06-02 10:29:07 -07:00
file_table.c
fs, file table: reinit files_stat.max_files after deferred memory initialisation
2015-08-07 04:39:40 +03:00
file.c
fs/file.c: __fget() and dup2() atomicity rules
2015-07-01 02:31:08 -04:00
filesystems.c
…
fs_pin.c
fs_pin: Allow for the possibility that m_list or s_list go unused.
2015-04-09 11:39:55 -05:00
fs_struct.c
…
fs-writeback.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-09-05 20:34:28 -07:00
inode.c
inode: don't softlockup when evicting inodes
2015-08-18 10:20:09 -07:00
internal.h
inode: rename i_wb_list to i_io_list
2015-08-17 23:38:10 -04:00
ioctl.c
…
Kconfig
fs: Remove ext3 filesystem driver
2015-07-23 20:59:40 +02:00
Kconfig.binfmt
mm: split ET_DYN ASLR from mmap ASLR
2015-04-14 16:49:05 -07:00
libfs.c
fs: Set the size of empty dirs to 0.
2015-08-12 15:28:45 -05:00
locks.c
fs: fix fs/locks.c kernel-doc warning
2015-08-31 16:27:25 -04:00
Makefile
userfaultfd: buildsystem activation
2015-09-04 16:54:41 -07:00
mbcache.c
…
mount.h
fs: use seq_open_private() for proc_mounts
2015-06-30 19:44:56 -07:00
mpage.c
block: remove bio_get_nr_vecs()
2015-08-13 12:32:04 -06:00
namei.c
vfs: Test for and handle paths that are unreachable from their mnt_root
2015-08-21 03:20:10 -04:00
namespace.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2015-09-01 16:13:25 -07:00
no-block.c
…
nsfs.c
nsfs: Add a show_path method to fix mountinfo
2015-07-11 11:09:00 -05:00
open.c
vfs: Commit to never having exectuables on proc and sysfs.
2015-07-10 10:39:25 -05:00
pipe.c
VFS: assorted weird filesystems: d_inode() annotations
2015-04-15 15:06:58 -04:00
pnode.c
mnt: Don't propagate unmounts to locked mounts
2015-04-02 20:34:20 -05:00
pnode.h
mnt: Clarify and correct the disconnect logic in umount_tree
2015-07-22 20:33:27 -05:00
posix_acl.c
fs/posix_acl.c: make posix_acl_create() safer and cleaner
2015-06-23 18:01:07 -04:00
proc_namespace.c
fs: use seq_open_private() for proc_mounts
2015-06-30 19:44:56 -07:00
read_write.c
new_sync_write(): discard ->ki_pos unless the return value is positive
2015-04-11 22:29:46 -04:00
readdir.c
…
select.c
locking/arch: Rename set_mb() to smp_store_mb()
2015-05-19 08:32:00 +02:00
seq_file.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-07-04 19:36:06 -07:00
signalfd.c
signalfd: fix information leak in signalfd_copyinfo
2015-08-07 04:39:40 +03:00
splice.c
Merge branch 'akpm' (patches from Andrew)
2015-06-24 20:47:21 -07:00
stack.c
…
stat.c
VFS: assorted d_backing_inode() annotations
2015-04-15 15:06:59 -04:00
statfs.c
…
super.c
Merge branch 'superblock-scaling' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next into for-next
2015-08-21 02:31:20 -04:00
sync.c
…
timerfd.c
…
userfaultfd.c
userfaultfd: avoid missing wakeups during refile in userfaultfd_read
2015-09-04 16:54:41 -07:00
utimes.c
…
xattr.c
evm: fix potential race when removing xattrs
2015-05-21 13:28:47 -04:00