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Jan Kara e3fce68cdb dax: Avoid page invalidation races and unnecessary radix tree traversals 
Currently dax_iomap_rw() takes care of invalidating page tables and
evicting hole pages from the radix tree when write(2) to the file
happens. This invalidation is only necessary when there is some block
allocation resulting from write(2). Furthermore in current place the
invalidation is racy wrt page fault instantiating a hole page just after
we have invalidated it.

So perform the page invalidation inside dax_iomap_actor() where we can
do it only when really necessary and after blocks have been allocated so
nobody will be instantiating new hole pages anymore.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-12-26 20:29:24 -08:00
..
9p
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
adfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
affs
vfs: remove ".readlink = generic_readlink" assignments
2016-12-09 16:45:04 +01:00
afs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
autofs4
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
befs
befs: add NFS export support
2016-12-22 11:25:24 +00:00
bfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
btrfs
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
cachefiles
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
ceph
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
cifs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
coda
vfs: remove ".readlink = generic_readlink" assignments
2016-12-09 16:45:04 +01:00
configfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
cramfs
…
crypto
fscrypt: Rename FS_WRITE_PATH_FL to FS_CTX_HAS_BOUNCE_BUFFER_FL
2016-12-11 16:33:18 -05:00
debugfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
devpts
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
dlm
ktime: Get rid of ktime_equal()
2016-12-25 17:21:23 +01:00
ecryptfs
vfs: remove ".readlink = generic_readlink" assignments
2016-12-09 16:45:04 +01:00
efivarfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
efs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
exofs
exofs: don't mess with simple_write_{begin,end}
2016-12-10 14:25:19 -05:00
exportfs
exportfs: be careful to only return expected errors.
2016-10-06 09:07:44 -04:00
ext2
ext2: Return BH_New buffers for zeroed blocks
2016-12-26 20:29:24 -08:00
ext4
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
f2fs
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
fat
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
freevxfs
…
fscache
…
fuse
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
gfs2
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
hfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
hfsplus
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
hostfs
vfs: remove ".readlink = generic_readlink" assignments
2016-12-09 16:45:04 +01:00
hpfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
hugetlbfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
isofs
Merge branch 'for-4.10/block' of git://git.kernel.dk/linux-block
2016-12-13 10:19:16 -08:00
jbd2
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
jffs2
vfs: remove ".readlink = generic_readlink" assignments
2016-12-09 16:45:04 +01:00
jfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
kernfs
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
lockd
netns: make struct pernet_operations::id unsigned int
2016-11-18 10:59:15 -05:00
minix
vfs: remove ".readlink = generic_readlink" assignments
2016-12-09 16:45:04 +01:00
ncpfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
nfs
ktime: Get rid of ktime_equal()
2016-12-25 17:21:23 +01:00
nfs_common
netns: make struct pernet_operations::id unsigned int
2016-11-18 10:59:15 -05:00
nfsd
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
nilfs2
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
nls
…
notify
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2016-12-19 08:23:53 -08:00
ntfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
ocfs2
ktime: Get rid of the union
2016-12-25 17:21:22 +01:00
omfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
openpromfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
orangefs
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
overlayfs
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
proc
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
pstore
Improvements and fixes to pstore subsystem:
2016-12-13 09:16:11 -08:00
qnx4
…
qnx6
…
quota
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2016-12-19 08:23:53 -08:00
ramfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
reiserfs
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
romfs
…
squashfs
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
sysfs
Merge branch 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2016-10-14 12:18:50 -07:00
sysv
vfs: remove ".readlink = generic_readlink" assignments
2016-12-09 16:45:04 +01:00
tracefs
fs: Replace CURRENT_TIME with current_time() for inode timestamps
2016-09-27 21:06:21 -04:00
ubifs
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2016-12-17 19:16:12 -08:00
udf
block,fs: untangle fs.h and blk_types.h
2016-11-01 09:43:26 -06:00
ufs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
xfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
aio.c
ktime: Get rid of the union
2016-12-25 17:21:22 +01:00
anon_inodes.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
attr.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
bad_inode.c
bad_inode: add missing i_op initializers
2016-12-09 11:57:43 +01:00
binfmt_aout.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
binfmt_elf_fdpic.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
binfmt_elf.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
binfmt_em86.c
…
binfmt_flat.c
…
binfmt_misc.c
fs: Replace current_fs_time() with current_time()
2016-09-27 21:06:22 -04:00
binfmt_script.c
…
block_dev.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
buffer.c
Merge branch 'for-4.10/fs-unmap' of git://git.kernel.dk/linux-block
2016-12-14 17:09:00 -08:00
char_dev.c
…
compat_binfmt_elf.c
…
compat_ioctl.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
compat.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
coredump.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
dax.c
dax: Avoid page invalidation races and unnecessary radix tree traversals
2016-12-26 20:29:24 -08:00
dcache.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
dcookies.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
direct-io.c
xfs: updates for 4.10-rc1
2016-12-14 21:35:31 -08:00
drop_caches.c
…
eventfd.c
…
eventpoll.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
exec.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
fcntl.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
fhandle.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
file_table.c
constify alloc_file()
2016-12-05 19:01:16 -05:00
file.c
fs/file: more unsigned file descriptors
2016-09-27 18:47:38 -04:00
filesystems.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
fs_pin.c
…
fs_struct.c
…
fs-writeback.c
fs/fs-writeback.c: remove redundant if check
2016-12-12 18:55:08 -08:00
inode.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
internal.h
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-12-17 18:44:00 -08:00
ioctl.c
vfs: call vfs_clone_file_range() under freeze protection
2016-12-16 11:02:54 +01:00
iomap.c
xfs: updates for 4.10-rc1
2016-12-14 21:35:31 -08:00
Kconfig
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-12-16 10:24:44 -08:00
Kconfig.binfmt
docs: fix locations of several documents that got moved
2016-10-24 08:12:35 -02:00
libfs.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
locks.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
Makefile
logfs: remove from tree
2016-12-14 23:48:11 -05:00
mbcache.c
mbcache: document that "find" functions only return reusable entries
2016-12-03 15:55:01 -05:00
mount.h
vfs: add path_is_mountpoint() helper
2016-12-03 20:51:35 -05:00
mpage.c
fs: Add helper to clean bdev aliases under a bh and use it
2016-11-04 14:34:47 -06:00
namei.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
namespace.c
Merge branch 'work.namespace' into for-linus
2016-12-22 23:04:31 -05:00
no-block.c
…
nsfs.c
net: add an ioctl to get a socket network namespace
2016-10-31 10:56:36 -04:00
open.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
pipe.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
pnode.c
reorganize do_make_slave()
2016-12-16 16:30:49 -05:00
pnode.h
mnt: Add a per mount namespace limit on the number of mounts
2016-09-30 12:46:48 -05:00
posix_acl.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
proc_namespace.c
…
read_write.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
readdir.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
select.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
seq_file.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
signalfd.c
…
splice.c
splice: reinstate SIGPIPE/EPIPE handling
2016-12-21 10:59:34 -08:00
stack.c
…
stat.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
statfs.c
vfs: misc struct path constification
2016-12-05 19:03:49 -05:00
super.c
quota: Remove dqonoff_mutex
2016-11-30 08:38:07 +01:00
sync.c
…
timerfd.c
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
userfaultfd.c
mm: join struct fault_env and vm_fault
2016-12-14 16:04:09 -08:00
utimes.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
xattr.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00