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Mel Gorman b969c4ab9f mm: compaction: determine if dirty pages can be migrated without blocking within ->migratepage ... Asynchronous compaction is used when allocating transparent hugepages to avoid blocking for long periods of time. Due to reports of stalling, there was a debate on disabling synchronous compaction but this severely impacted allocation success rates. Part of the reason was that many dirty pages are skipped in asynchronous compaction by the following check; if (PageDirty(page) && !sync && mapping->a_ops->migratepage != migrate_page) rc = -EBUSY; This skips over all mapping aops using buffer_migrate_page() even though it is possible to migrate some of these pages without blocking. This patch updates the ->migratepage callback with a "sync" parameter. It is the responsibility of the callback to fail gracefully if migration would block. Signed-off-by: Mel Gorman <mgorman@suse.de> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Dave Jones <davej@redhat.com> Cc: Jan Kara <jack@suse.cz> Cc: Andy Isaacson <adi@hexapodia.org> Cc: Nai Xia <nai.xia@gmail.com> Cc: Johannes Weiner <jweiner@redhat.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	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs	13 years ago
adfs	vfs: switch ->show_options() to struct dentry *	13 years ago
affs	affs: propagate umode_t	13 years ago
afs	switch ->create() to umode_t	13 years ago
autofs4	autofs4: deal with autofs4_write/autofs4_write races	13 years ago
befs	vfs: fix the stupidity with i_dentry in inode destructors	13 years ago
bfs	switch ->create() to umode_t	13 years ago
btrfs	mm: compaction: determine if dirty pages can be migrated without blocking within ->migratepage	13 years ago
cachefiles	fs: move code out of buffer.c	13 years ago
ceph	ceph: d_alloc_root() may fail	13 years ago
cifs	Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
coda	coda: switch coda_cnode_make() to sane API as well, clean coda_lookup()	13 years ago
configfs	configfs: convert to umode_t	13 years ago
cramfs	Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z	13 years ago
debugfs	Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
devpts	devpts: fix double-free on mount failure	13 years ago
dlm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm	13 years ago
ecryptfs	vfs: switch ->show_options() to struct dentry *	13 years ago
efs	vfs: fix the stupidity with i_dentry in inode destructors	13 years ago
exofs	Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd	13 years ago
exportfs	…
ext2	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	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	Merge branch 'for_linus' into for_linus_merged	13 years ago
fat	Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb	13 years ago
freevxfs	fs: propagate umode_t, misc bits	13 years ago
fscache	…
fuse	vfs: switch ->show_options() to struct dentry *	13 years ago
gfs2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm	13 years ago
hfs	vfs: switch ->show_options() to struct dentry *	13 years ago
hfsplus	hfsplus: creation of hidden dir on mount can fail	13 years ago
hostfs	vfs: switch ->show_options() to struct dentry *	13 years ago
hpfs	switch ->mknod() to umode_t	13 years ago
hppfs	vfs: for usbfs, etc. internal vfsmounts ->mnt_sb->s_root == ->mnt_root	13 years ago
hugetlbfs	mm: compaction: determine if dirty pages can be migrated without blocking within ->migratepage	13 years ago
isofs	isofs: inode leak on mount failure	13 years ago
jbd	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	13 years ago
jbd2	Merge branch 'for_linus' into for_linus_merged	13 years ago
jffs2	MTD pull for 3.3	13 years ago
jfs	Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm	13 years ago
lockd	vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb	13 years ago
logfs	MTD pull for 3.3	13 years ago
minix	Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	13 years ago
ncpfs	vfs: switch ->show_options() to struct dentry *	13 years ago
nfs	mm: compaction: determine if dirty pages can be migrated without blocking within ->migratepage	13 years ago
nfs_common	…
nfsd	Merge branch 'nfs-for-3.3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs	13 years ago
nilfs2	Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm	13 years ago
nls	NLS: raname "maxlen" to "maxout" in UTF conversion routines	13 years ago
notify	vfs: move fsnotify junk to struct mount	13 years ago
ntfs	vfs: switch ->show_options() to struct dentry *	13 years ago
ocfs2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm	13 years ago
omfs	omfs: propagate umode_t	13 years ago
openpromfs	vfs: fix the stupidity with i_dentry in inode destructors	13 years ago
proc	proc: fix null pointer deref in proc_pid_permission()	13 years ago
pstore	pstore: gracefully handle NULL pstore_info functions	13 years ago
qnx4	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	13 years ago
quota	vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb	13 years ago
ramfs	pohmelfs: propagate umode_t	13 years ago
reiserfs	reiserfs: don't lock root inode searching	13 years ago
romfs	MTD pull for 3.3	13 years ago
squashfs	vfs: fix the stupidity with i_dentry in inode destructors	13 years ago
sysfs	sysfs: propagate umode_t	13 years ago
sysv	vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb	13 years ago
ubifs	Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6	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	vfs: switch ->show_options() to struct dentry *	13 years ago
xfs	Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs	13 years ago
Kconfig	Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd	13 years ago
Kconfig.binfmt	fs: binfmt_elf: create Kconfig variable for PIE randomization	13 years ago
Makefile	Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z	13 years ago
aio.c	aio: allocate kiocbs in batches	13 years ago
anon_inodes.c	…
attr.c	switch is_sxid() to umode_t	13 years ago
bad_inode.c	switch ->mknod() to umode_t	13 years ago
binfmt_aout.c	…
binfmt_elf.c	fs: binfmt_elf: create Kconfig variable for PIE randomization	13 years ago
binfmt_elf_fdpic.c	…
binfmt_em86.c	…
binfmt_flat.c	…
binfmt_misc.c	vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb	13 years ago
binfmt_script.c	…
binfmt_som.c	…
bio-integrity.c	…
bio.c	bio: change some signed vars to unsigned	13 years ago
block_dev.c	block_dev: Suppress bdev_cache_init() kmemleak warninig	13 years ago
buffer.c	fs: move code out of buffer.c	13 years ago
char_dev.c	char_dev.c: fix up some whitespace errors	13 years ago
compat.c	switch open and mkdir syscalls to umode_t	13 years ago
compat_binfmt_elf.c	…
compat_ioctl.c	vfs: fix up ENOIOCTLCMD error handling	13 years ago
dcache.c	fix shrink_dcache_parent() livelock	13 years ago
dcookies.c	…
direct-io.c	…
drop_caches.c	…
eventfd.c	…
eventpoll.c	epoll: limit paths	13 years ago
exec.c	tracepoint: add tracepoints for debugging oom_score_adj	13 years ago
fcntl.c	…
fhandle.c	vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb	13 years ago
fifo.c	…
file.c	…
file_table.c	vfs: prevent remount read-only if pending removes	13 years ago
filesystems.c	vfs: convert fs_supers to hlist	13 years ago
fs-writeback.c	Merge branch 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux	13 years ago
fs_struct.c	…
generic_acl.c	…
inode.c	mm: account reaped page cache on inode cache pruning	13 years ago
internal.h	vfs: protect remounting superblock read-only	13 years ago
ioctl.c	vfs: fix up ENOIOCTLCMD error handling	13 years ago
ioprio.c	…
libfs.c	fs: move code out of buffer.c	13 years ago
locks.c	vfs: fix handling of lock allocation failure in lease-break case	13 years ago
mbcache.c	…
mount.h	vfs: keep list of mounts for each superblock	13 years ago
mpage.c	…
namei.c	Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z	13 years ago
namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	13 years ago
no-block.c	…
open.c	switch security_path_chmod() to struct path *	13 years ago
pipe.c	pipe: fail cleanly when root tries F_SETPIPE_SZ with big size	13 years ago
pnode.c	vfs: switch pnode.h macros to struct mount *	13 years ago
pnode.h	vfs: switch pnode.h macros to struct mount *	13 years ago
posix_acl.c	…
proc_namespace.c	vfs: switch ->show_options() to struct dentry *	13 years ago
read_write.c	…
read_write.h	…
readdir.c	…
select.c	…
seq_file.c	constify seq_file stuff	13 years ago
signalfd.c	…
splice.c	fs: move code out of buffer.c	13 years ago
stack.c	filesystems: add set_nlink()	13 years ago
stat.c	…
statfs.c	vfs: new helper - vfs_ustat()	13 years ago
super.c	vfs: prevent remount read-only if pending removes	13 years ago
sync.c	fs: move code out of buffer.c	13 years ago
timerfd.c	…
utimes.c	…
xattr.c	vfs: mnt_drop_write_file()	13 years ago
xattr_acl.c	…