Mel Gorman 453f85d43f mm: remove __GFP_COLD ... As the page free path makes no distinction between cache hot and cold pages, there is no real useful ordering of pages in the free list that allocation requests can take advantage of. Juding from the users of __GFP_COLD, it is likely that a number of them are the result of copying other sites instead of actually measuring the impact. Remove the __GFP_COLD parameter which simplifies a number of paths in the page allocator. This is potentially controversial but bear in mind that the size of the per-cpu pagelists versus modern cache sizes means that the whole per-cpu list can often fit in the L3 cache. Hence, there is only a potential benefit for microbenchmarks that alloc/free pages in a tight loop. It's even worse when THP is taken into account which has little or no chance of getting a cache-hot page as the per-cpu list is bypassed and the zeroing of multiple pages will thrash the cache anyway. The truncate microbenchmarks are not shown as this patch affects the allocation path and not the free path. A page fault microbenchmark was tested but it showed no sigificant difference which is not surprising given that the __GFP_COLD branches are a miniscule percentage of the fault path. Link: http://lkml.kernel.org/r/20171018075952.10627-9-mgorman@techsingularity.net Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Jan Kara <jack@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2017-11-15 18:21:06 -08:00
..
9p	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
adfs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
affs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
afs	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
autofs4	Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-09-14 18:13:32 -07:00
befs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
bfs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
btrfs	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
cachefiles	mm: remove __GFP_COLD	2017-11-15 18:21:06 -08:00
ceph	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
cifs	cifs: use find_get_pages_range_tag()	2017-11-15 18:21:04 -08:00
coda	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
configfs	configfs: make ci_type field, some pointers and function arguments const	2017-10-19 16:15:16 +02:00
cramfs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
crypto	fscrypt: lots of cleanups, mostly courtesy by Eric Biggers	2017-11-14 11:35:15 -08:00
debugfs	Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-07-15 12:00:42 -07:00
devpts	pty: Repair TIOCGPTPEER	2017-08-24 13:23:03 -07:00
dlm	A couple of configfs cleanups:	2017-11-14 14:44:04 -08:00
ecryptfs	slab, slub, slob: add slab_flags_t	2017-11-15 18:21:01 -08:00
efivarfs	VFS: Kill off s_options and helpers	2017-07-11 06:09:21 -04:00
efs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
exofs	Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block	2017-09-07 11:59:42 -07:00
exportfs
ext2	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-11-14 14:13:11 -08:00
ext4	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
f2fs	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
fat	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
freevxfs
fscache	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
fuse	mm: remove cold parameter for release_pages	2017-11-15 18:21:06 -08:00
gfs2	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
hfs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
hfsplus	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
hostfs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
hpfs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
hugetlbfs	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
isofs	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-11-14 14:13:11 -08:00
jbd2	jbd2: convert timers to use timer_setup()	2017-10-18 12:40:28 -04:00
jffs2	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
jfs	A couple small fixes for jfs	2017-11-14 13:53:18 -08:00
kernfs	Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block	2017-09-07 11:59:42 -07:00
lockd	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
minix	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ncpfs	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-11-13 17:56:58 -08:00
nfs	Merge branch 'linus' into locking/core, to resolve conflicts	2017-11-07 10:32:44 +01:00
nfs_common
nfsd	Add support for online resizing of file systems with bigalloc. Fix a	2017-11-14 12:59:42 -08:00
nilfs2	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
nls	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
notify	Merge branch 'for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2017-11-15 10:14:11 -08:00
ntfs	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
ocfs2	ocfs2: remove unneeded goto in ocfs2_reserve_cluster_bitmap_bits()	2017-11-15 18:21:01 -08:00
omfs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
openpromfs
orangefs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
overlayfs	Merge branch 'linus' into locking/core, to resolve conflicts	2017-11-07 10:32:44 +01:00
proc	mm: consolidate page table accounting	2017-11-15 18:21:04 -08:00
pstore	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-11-13 17:56:58 -08:00
qnx4	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
qnx6	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
quota	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-11-14 14:13:11 -08:00
ramfs	mm: make pagevec_lookup() update index	2017-09-06 17:27:26 -07:00
reiserfs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
romfs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
squashfs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sysfs
sysv	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
tracefs
ubifs	fscrypt: lots of cleanups, mostly courtesy by Eric Biggers	2017-11-14 11:35:15 -08:00
udf	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-11-14 14:13:11 -08:00
ufs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
xfs	slab, slub, slob: add slab_flags_t	2017-11-15 18:21:01 -08:00
aio.c	locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()	2017-10-25 11:01:08 +02:00
anon_inodes.c
attr.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
bad_inode.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
binfmt_aout.c	fs: fix kernel_read prototype	2017-09-04 19:05:15 -04:00
binfmt_elf_fdpic.c	Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-09-14 18:13:32 -07:00
binfmt_elf.c	regset: Add support for dynamically sized regsets	2017-11-03 15:24:11 +00:00
binfmt_em86.c
binfmt_flat.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
binfmt_misc.c	fs/binfmt_misc.c: node could be NULL when evicting inode	2017-10-13 16:18:33 -07:00
binfmt_script.c	exec: load_script: kill the onstack interp[BINPRM_BUF_SIZE] array	2017-10-03 17:54:25 -07:00
block_dev.c	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
buffer.c	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
char_dev.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compat_binfmt_elf.c
compat_ioctl.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compat.c
coredump.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dax.c	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
dcache.c	kmemcheck: remove annotations	2017-11-15 18:21:04 -08:00
dcookies.c
direct-io.c	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
drop_caches.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
eventfd.c
eventpoll.c	fs/epoll: use faster rb_first_cached()	2017-09-08 18:26:49 -07:00
exec.c	locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()	2017-10-25 11:01:08 +02:00
fcntl.c	Merge branch 'linus' into locking/core, to resolve conflicts	2017-11-07 10:32:44 +01:00
fhandle.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
file_table.c	fs, mm: account filp cache to kmemcg	2017-11-15 18:21:04 -08:00
file.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
filesystems.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
fs_pin.c	Merge branch 'linus' into locking/core, to resolve conflicts	2017-11-07 10:32:44 +01:00
fs_struct.c
fs-writeback.c	writeback: merge try_to_writeback_inodes_sb_nr() into caller	2017-10-10 08:14:37 -06:00
inode.c	locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()	2017-10-25 11:01:08 +02:00
internal.h	Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs	2017-09-13 09:11:44 -07:00
ioctl.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
iomap.c	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
Kconfig	fs/Kconfig: kill CONFIG_PERCPU_RWSEM some more	2017-07-12 16:26:00 -07:00
Kconfig.binfmt
libfs.c	fs: convert __generic_file_fsync to use errseq_t based reporting	2017-07-06 07:02:29 -04:00
locks.c	locks: restore a warn for leaked locks on close	2017-07-21 13:57:31 -04:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mbcache.c
mount.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mpage.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
namei.c	Merge branch 'linus' into locking/core, to resolve conflicts	2017-11-07 10:32:44 +01:00
namespace.c	vfs: fix mounting a filesystem with i_version	2017-11-08 15:16:36 -05:00
no-block.c
nsfs.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
open.c	ovl: don't allow writing ioctl on lower layer	2017-09-05 12:53:12 +02:00
pipe.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
pnode.c
pnode.h
posix_acl.c
proc_namespace.c	Merge branch 'linus' into locking/core, to resolve conflicts	2017-11-07 10:32:44 +01:00
read_write.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
readdir.c	Merge branch 'linus' into locking/core, to resolve conflicts	2017-11-07 10:32:44 +01:00
select.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
seq_file.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
signalfd.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
splice.c	locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()	2017-10-25 11:01:08 +02:00
stack.c
stat.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
statfs.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
super.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sync.c	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
timerfd.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
userfaultfd.c	userfaultfd: use mmgrab instead of open-coded increment of mm_count	2017-11-15 18:21:05 -08:00
utimes.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
xattr.c	lsm: fix smack_inode_removexattr and xattr_getsecurity memleak	2017-10-04 18:03:15 +11:00