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Michel Lespinasse 38a76013ad mm: avoid taking rmap locks in move_ptes() ... During mremap(), the destination VMA is generally placed after the original vma in rmap traversal order: in move_vma(), we always have new_pgoff >= vma->vm_pgoff, and as a result new_vma->vm_pgoff >= vma->vm_pgoff unless vma_merge() merged the new vma with an adjacent one. When the destination VMA is placed after the original in rmap traversal order, we can avoid taking the rmap locks in move_ptes(). Essentially, this reintroduces the optimization that had been disabled in "mm anon rmap: remove anon_vma_moveto_tail". The difference is that we don't try to impose the rmap traversal order; instead we just rely on things being in the desired order in the common case and fall back to taking locks in the uncommon case. Also we skip the i_mmap_mutex in addition to the anon_vma lock: in both cases, the vmas are traversed in increasing vm_pgoff order with ties resolved in tree insertion order. Signed-off-by: Michel Lespinasse <walken@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Daniel Santos <daniel.santos@pobox.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		13 years ago
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9p	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
adfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
affs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
afs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
autofs4	make get_file() return its argument	13 years ago
befs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
bfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
btrfs	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
cachefiles	fs: cachefiles: add support for large files in filesystem caching	13 years ago
ceph	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
cifs	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
coda	fs: push rcu_barrier() from deactivate_locked_super() to filesystems	13 years ago
configfs	userns: Convert configfs to use kuid and kgid where appropriate	13 years ago
cramfs	userns: Convert cramfs to use kuid/kgid where appropriate	13 years ago
debugfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	13 years ago
devpts	VFS: Pass mount flags to sget()	13 years ago
dlm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	13 years ago
ecryptfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
efs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
exofs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
exportfs	switch dentry_open() to struct path, make it grab references itself	13 years ago
ext2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
ext3	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	13 years ago
ext4	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
fat	fat: simplify writeback_inode()	13 years ago
freevxfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
fscache	…
fuse	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
gfs2	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
hfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
hfsplus	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
hostfs	userns: Convert hostfs to use kuid and kgid where appropriate	13 years ago
hpfs	hpfs: convert to use leXX_add_cpu()	13 years ago
hppfs	switch dentry_open() to struct path, make it grab references itself	13 years ago
hugetlbfs	mm: replace vma prio_tree with an interval tree	13 years ago
isofs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
jbd	jbd: Fix assertion failure in commit code due to lacking transaction credits	13 years ago
jbd2	The big new feature added this time is supporting online resizing	13 years ago
jffs2	rbtree: move some implementation details from rbtree.h to rbtree.c	13 years ago
jfs	JFS TRIM support and some minor fixes	13 years ago
lockd	close the race in nlmsvc_free_block()	13 years ago
logfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
minix	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
ncpfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
nfs	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
nfs_common	…
nfsd	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
nilfs2	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
nls	…
notify	switch simple cases of fget_light to fdget	13 years ago
ntfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
ocfs2	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
omfs	omfs: convert to use beXX_add_cpu()	13 years ago
openpromfs	fs: push rcu_barrier() from deactivate_locked_super() to filesystems	13 years ago
proc	rbtree: fix incorrect rbtree node insertion in fs/proc/proc_sysctl.c	13 years ago
pstore	pstore: Avoid recursive spinlocks in the oops_in_progress case	13 years ago
qnx4	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
qnx6	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
quota	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	13 years ago
ramfs	don't pass nameidata to ->create()	13 years ago
reiserfs	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	13 years ago
romfs	fs: push rcu_barrier() from deactivate_locked_super() to filesystems	13 years ago
squashfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
sysfs	sysfs: Fix comment typo "sysf_create_link".	13 years ago
sysv	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
ubifs	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
udf	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	13 years ago
ufs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
xfs	mm: kill vma flag VM_CAN_NONLINEAR	13 years ago
Kconfig	…
Kconfig.binfmt	coredump: make core dump functionality optional	13 years ago
Makefile	coredump: make core dump functionality optional	13 years ago
aio.c	aio: now fput() is OK from interrupt context; get rid of manual delayed __fput()	13 years ago
anon_inodes.c	…
attr.c	ima: add inode_post_setattr call	13 years ago
bad_inode.c	don't pass nameidata to ->create()	13 years ago
binfmt_aout.c	coredump: pass siginfo_t* to do_coredump() and below, not merely signr	13 years ago
binfmt_elf.c	mm: kill vma flag VM_RESERVED and mm->reserved_vm counter	13 years ago
binfmt_elf_fdpic.c	mm: kill vma flag VM_RESERVED and mm->reserved_vm counter	13 years ago
binfmt_em86.c	…
binfmt_flat.c	coredump: pass siginfo_t* to do_coredump() and below, not merely signr	13 years ago
binfmt_misc.c	…
binfmt_script.c	…
binfmt_som.c	…
bio-integrity.c	…
bio.c	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	13 years ago
block_dev.c	fs/block-dev.c:fix performance regression in O_DIRECT writes to md block devices	13 years ago
buffer.c	The big new feature added this time is supporting online resizing	13 years ago
char_dev.c	…
compat.c	compat: fs: Generic compat_sys_sendfile implementation	13 years ago
compat_binfmt_elf.c	coredump: extend core dump note section to contain file names of mapped files	13 years ago
compat_ioctl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
coredump.c	coredump: pass siginfo_t* to do_coredump() and below, not merely signr	13 years ago
coredump.h	coredump: update coredump-related headers	13 years ago
dcache.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
dcookies.c	…
direct-io.c	block: move down direct IO plugging	13 years ago
drop_caches.c	…
eventfd.c	…
eventpoll.c	epoll: support for disabling items, and a self-test app	13 years ago
exec.c	mm: avoid taking rmap locks in move_ptes()	13 years ago
fcntl.c	fcntl: fix misannotations	13 years ago
fhandle.c	switch simple cases of fget_light to fdget	13 years ago
fifo.c	fifo: Do not restart open() if it already found a partner	13 years ago
file.c	export fget_light	13 years ago
file_table.c	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	13 years ago
filesystems.c	…
fs-writeback.c	The big new feature added this time is supporting online resizing	13 years ago
fs_struct.c	get rid of ->mnt_longterm	13 years ago
generic_acl.c	userns: Pass a userns parameter into posix_acl_to_xattr and posix_acl_from_xattr	13 years ago
inode.c	mm: replace vma prio_tree with an interval tree	13 years ago
internal.h	fs: Add freezing handling to mnt_want_write() / mnt_drop_write()	13 years ago
ioctl.c	switch simple cases of fget_light to fdget	13 years ago
ioprio.c	…
libfs.c	vfs: fix kerneldoc for generic_fh_to_parent()	13 years ago
locks.c	switch simple cases of fget_light to fdget	13 years ago
mbcache.c	…
mount.h	get rid of magic in proc_namespace.c	13 years ago
mpage.c	…
namei.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
namespace.c	do_add_mount()/umount -l races	13 years ago
no-block.c	…
open.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
pipe.c	pipe(2) - race-free error recovery	13 years ago
pnode.c	VFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors	13 years ago
pnode.h	…
posix_acl.c	userns: Convert vfs posix_acl support to use kuids and kgids	13 years ago
proc_namespace.c	get rid of magic in proc_namespace.c	13 years ago
read_write.c	compat: fs: Generic compat_sys_sendfile implementation	13 years ago
read_write.h	compat: fs: Generic compat_sys_sendfile implementation	13 years ago
readdir.c	switch simple cases of fget_light to fdget	13 years ago
select.c	switch simple cases of fget_light to fdget	13 years ago
seq_file.c	userns: Make seq_file's user namespace accessible	13 years ago
signalfd.c	switch simple cases of fget_light to fdget	13 years ago
splice.c	switch simple cases of fget_light to fdget	13 years ago
stack.c	…
stat.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
statfs.c	switch simple cases of fget_light to fdget	13 years ago
super.c	idr: rename MAX_LEVEL to MAX_IDR_LEVEL	13 years ago
sync.c	switch simple cases of fget_light to fdget	13 years ago
timerfd.c	switch simple cases of fget_light to fdget	13 years ago
utimes.c	switch simple cases of fget_light to fdget	13 years ago
xattr.c	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	13 years ago
xattr_acl.c	userns: Pass a userns parameter into posix_acl_to_xattr and posix_acl_from_xattr	13 years ago