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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>
 		2012-01-12 20:13:09 -08:00
..
9p Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs 2012-01-10 15:09:01 -08:00
adfs vfs: switch ->show_options() to struct dentry * 2012-01-06 23:19:54 -05:00
affs affs: propagate umode_t 2012-01-03 22:55:04 -05:00
afs switch ->create() to umode_t 2012-01-03 22:54:53 -05:00
autofs4 autofs4: deal with autofs4_write/autofs4_write races 2012-01-11 00:20:12 -05:00
befs vfs: fix the stupidity with i_dentry in inode destructors 2012-01-03 22:52:40 -05:00
bfs switch ->create() to umode_t 2012-01-03 22:54:53 -05:00
btrfs mm: compaction: determine if dirty pages can be migrated without blocking within ->migratepage 2012-01-12 20:13:09 -08:00
cachefiles fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
ceph ceph: d_alloc_root() may fail 2012-01-09 16:36:12 -05:00
cifs Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-01-08 12:19:57 -08:00
coda coda: switch coda_cnode_make() to sane API as well, clean coda_lookup() 2012-01-10 11:13:16 -05:00
configfs configfs: convert to umode_t 2012-01-03 22:54:57 -05:00
cramfs Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z 2012-01-06 23:15:54 -05:00
debugfs Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-01-08 12:19:57 -08:00
devpts devpts: fix double-free on mount failure 2012-01-08 20:19:03 -05:00
dlm Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm 2012-01-10 14:55:55 -08:00
ecryptfs vfs: switch ->show_options() to struct dentry * 2012-01-06 23:19:54 -05:00
efs vfs: fix the stupidity with i_dentry in inode destructors 2012-01-03 22:52:40 -05:00
exofs Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd 2012-01-09 12:51:01 -08:00
exportfs
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ext2 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2012-01-09 12:51:21 -08:00
ext3 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2012-01-09 12:51:21 -08:00
ext4 Merge branch 'for_linus' into for_linus_merged 2012-01-10 11:54:07 -05:00
fat Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb 2012-01-09 12:09:47 -08:00
freevxfs fs: propagate umode_t, misc bits 2012-01-03 22:55:10 -05:00
fscache FS-Cache: Fix __fscache_uncache_all_inode_pages()'s outer loop 2011-07-21 10:59:16 -07:00
fuse vfs: switch ->show_options() to struct dentry * 2012-01-06 23:19:54 -05:00
gfs2 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm 2012-01-10 14:55:55 -08:00
hfs vfs: switch ->show_options() to struct dentry * 2012-01-06 23:19:54 -05:00
hfsplus hfsplus: creation of hidden dir on mount can fail 2012-01-10 17:48:52 -05:00
hostfs vfs: switch ->show_options() to struct dentry * 2012-01-06 23:19:54 -05:00
hpfs switch ->mknod() to umode_t 2012-01-03 22:54:54 -05:00
hppfs vfs: for usbfs, etc. internal vfsmounts ->mnt_sb->s_root == ->mnt_root 2012-01-03 22:52:41 -05:00
hugetlbfs mm: compaction: determine if dirty pages can be migrated without blocking within ->migratepage 2012-01-12 20:13:09 -08:00
isofs isofs: inode leak on mount failure 2012-01-09 10:48:11 -05:00
jbd Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2012-01-09 12:51:21 -08:00
jbd2 Merge branch 'for_linus' into for_linus_merged 2012-01-10 11:54:07 -05:00
jffs2 MTD pull for 3.3 2012-01-10 13:45:22 -08:00
jfs Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 2012-01-08 13:10:57 -08:00
lockd vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb 2012-01-06 23:16:53 -05:00
logfs MTD pull for 3.3 2012-01-10 13:45:22 -08:00
minix Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-01-08 12:19:57 -08:00
ncpfs vfs: switch ->show_options() to struct dentry * 2012-01-06 23:19:54 -05:00
nfs mm: compaction: determine if dirty pages can be migrated without blocking within ->migratepage 2012-01-12 20:13:09 -08:00
nfs_common
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nfsd Merge branch 'nfs-for-3.3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs 2012-01-10 14:57:40 -08:00
nilfs2 Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 2012-01-08 13:10:57 -08:00
nls NLS: raname "maxlen" to "maxout" in UTF conversion routines 2011-11-26 19:58:47 -08:00
notify vfs: move fsnotify junk to struct mount 2012-01-03 22:57:12 -05:00
ntfs vfs: switch ->show_options() to struct dentry * 2012-01-06 23:19:54 -05:00
ocfs2 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm 2012-01-10 14:55:55 -08:00
omfs omfs: propagate umode_t 2012-01-03 22:55:01 -05:00
openpromfs vfs: fix the stupidity with i_dentry in inode destructors 2012-01-03 22:52:40 -05:00
proc proc: fix null pointer deref in proc_pid_permission() 2012-01-12 20:13:02 -08:00
pstore pstore: gracefully handle NULL pstore_info functions 2011-11-18 13:49:00 -08:00
qnx4 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-01-08 13:21:22 -08:00
quota vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb 2012-01-06 23:16:53 -05:00
ramfs pohmelfs: propagate umode_t 2012-01-03 22:55:07 -05:00
reiserfs reiserfs: don't lock root inode searching 2012-01-10 16:30:54 -08:00
romfs MTD pull for 3.3 2012-01-10 13:45:22 -08:00
squashfs vfs: fix the stupidity with i_dentry in inode destructors 2012-01-03 22:52:40 -05:00
sysfs sysfs: propagate umode_t 2012-01-03 22:55:03 -05:00
sysv vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb 2012-01-06 23:16:53 -05:00
ubifs Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6 2012-01-10 14:57:19 -08:00
udf Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2012-01-09 12:51:21 -08:00
ufs vfs: switch ->show_options() to struct dentry * 2012-01-06 23:19:54 -05:00
xfs Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs 2012-01-09 12:50:15 -08:00
Kconfig Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd 2012-01-09 12:51:01 -08:00
Kconfig.binfmt fs: binfmt_elf: create Kconfig variable for PIE randomization 2012-01-10 16:30:51 -08:00
Makefile Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z 2012-01-06 23:15:54 -05:00
aio.c aio: allocate kiocbs in batches 2011-11-02 16:07:03 -07:00
anon_inodes.c vfs: dont chain pipe/anon/socket on superblock s_inodes list 2011-07-26 12:57:09 -04:00
attr.c switch is_sxid() to umode_t 2012-01-03 22:55:11 -05:00
bad_inode.c switch ->mknod() to umode_t 2012-01-03 22:54:54 -05:00
binfmt_aout.c
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binfmt_elf.c fs: binfmt_elf: create Kconfig variable for PIE randomization 2012-01-10 16:30:51 -08:00
binfmt_elf_fdpic.c consolidate BINPRM_FLAGS_ENFORCE_NONDUMP handling 2011-07-20 01:43:10 -04:00
binfmt_em86.c
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binfmt_flat.c
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binfmt_misc.c vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb 2012-01-06 23:16:53 -05:00
binfmt_script.c
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binfmt_som.c
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bio-integrity.c fs: add export.h to files using EXPORT_SYMBOL/THIS_MODULE macros 2011-10-31 19:30:31 -04:00
bio.c bio: change some signed vars to unsigned 2011-11-16 09:21:50 +01:00
block_dev.c block_dev: Suppress bdev_cache_init() kmemleak warninig 2012-01-10 13:08:55 -05:00
buffer.c fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
char_dev.c char_dev.c: fix up some whitespace errors 2011-12-13 11:18:17 -08:00
compat.c switch open and mkdir syscalls to umode_t 2012-01-03 22:55:19 -05:00
compat_binfmt_elf.c
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compat_ioctl.c vfs: fix up ENOIOCTLCMD error handling 2012-01-05 15:40:12 -08:00
dcache.c fix shrink_dcache_parent() livelock 2012-01-10 13:06:32 -05:00
dcookies.c oprofile, dcookies: Fix possible circular locking dependency 2011-05-31 16:33:35 +02:00
direct-io.c direct-io: merge direct_io_walker into __blockdev_direct_IO 2011-10-28 14:58:58 +02:00
drop_caches.c
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eventfd.c
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eventpoll.c epoll: limit paths 2012-01-12 20:13:04 -08:00
exec.c tracepoint: add tracepoints for debugging oom_score_adj 2012-01-10 16:30:44 -08:00
fcntl.c
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fhandle.c vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb 2012-01-06 23:16:53 -05:00
fifo.c
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file.c
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file_table.c vfs: prevent remount read-only if pending removes 2012-01-06 23:20:13 -05:00
filesystems.c vfs: convert fs_supers to hlist 2012-01-03 22:52:39 -05:00
fs-writeback.c Merge branch 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux 2012-01-10 16:59:59 -08:00
fs_struct.c
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generic_acl.c switch posix_acl_equiv_mode() to umode_t * 2011-08-01 02:10:06 -04:00
inode.c mm: account reaped page cache on inode cache pruning 2012-01-10 16:30:42 -08:00
internal.h vfs: protect remounting superblock read-only 2012-01-06 23:20:12 -05:00
ioctl.c vfs: fix up ENOIOCTLCMD error handling 2012-01-05 15:40:12 -08:00
ioprio.c fs: add export.h to files using EXPORT_SYMBOL/THIS_MODULE macros 2011-10-31 19:30:31 -04:00
libfs.c fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
locks.c vfs: fix handling of lock allocation failure in lease-break case 2011-12-26 10:25:26 -08:00
mbcache.c
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mount.h vfs: keep list of mounts for each superblock 2012-01-06 23:20:12 -05:00
mpage.c
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namei.c Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z 2012-01-06 23:15:54 -05:00
namespace.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-01-08 13:21:22 -08:00
no-block.c
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open.c switch security_path_chmod() to struct path * 2012-01-06 23:16:53 -05:00
pipe.c pipe: fail cleanly when root tries F_SETPIPE_SZ with big size 2012-01-12 20:13:04 -08:00
pnode.c vfs: switch pnode.h macros to struct mount * 2012-01-03 22:57:11 -05:00
pnode.h vfs: switch pnode.h macros to struct mount * 2012-01-03 22:57:11 -05:00
posix_acl.c vfs: pass all mask flags check_acl and posix_acl_permission 2011-10-28 14:58:54 +02:00
proc_namespace.c vfs: switch ->show_options() to struct dentry * 2012-01-06 23:19:54 -05:00
read_write.c Cross Memory Attach 2011-10-31 17:30:44 -07:00
read_write.h
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readdir.c
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select.c
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seq_file.c constify seq_file stuff 2012-01-03 22:52:40 -05:00
signalfd.c
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splice.c fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
stack.c filesystems: add set_nlink() 2011-11-02 12:53:43 +01:00
stat.c readlinkat: ensure we return ENOENT for the empty pathname for normal lookups 2011-11-02 12:53:42 +01:00
statfs.c vfs: new helper - vfs_ustat() 2012-01-03 22:53:07 -05:00
super.c vfs: prevent remount read-only if pending removes 2012-01-06 23:20:13 -05:00
sync.c fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
timerfd.c timerfd: Fix wakeup of processes when timer is cancelled on clock change 2011-06-14 11:46:14 +02:00
utimes.c
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xattr.c vfs: mnt_drop_write_file() 2012-01-03 22:52:40 -05:00
xattr_acl.c
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