Arun KS 3d6357de8a mm: reference totalram_pages and managed_pages once per function ... Patch series "mm: convert totalram_pages, totalhigh_pages and managed pages to atomic", v5. This series converts totalram_pages, totalhigh_pages and zone->managed_pages to atomic variables. totalram_pages, zone->managed_pages and totalhigh_pages updates are protected by managed_page_count_lock, but readers never care about it. Convert these variables to atomic to avoid readers potentially seeing a store tear. Main motivation was that managed_page_count_lock handling was complicating things. It was discussed in length here, https://lore.kernel.org/patchwork/patch/995739/#1181785 It seemes better to remove the lock and convert variables to atomic. With the change, preventing poteintial store-to-read tearing comes as a bonus. This patch (of 4): This is in preparation to a later patch which converts totalram_pages and zone->managed_pages to atomic variables. Please note that re-reading the value might lead to a different value and as such it could lead to unexpected behavior. There are no known bugs as a result of the current code but it is better to prevent from them in principle. Link: http://lkml.kernel.org/r/1542090790-21750-2-git-send-email-arunks@codeaurora.org Signed-off-by: Arun KS <arunks@codeaurora.org> Reviewed-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Reviewed-by: David Hildenbrand <david@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2018-12-28 12:11:47 -08:00
..
9p	Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-11-01 19:58:52 -07:00
adfs	adfs: use timespec64 for time conversion	2018-08-22 10:52:51 -07:00
affs	affs: fix potential memory leak when parsing option 'prefix'	2018-05-28 12:36:41 +02:00
afs	Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-11-30 10:47:50 -08:00
autofs	Merge branch 'akpm' (patches from Andrew)	2018-08-22 12:34:08 -07:00
befs	fix a series of Documentation/ broken file name references	2018-06-15 18:10:01 -03:00
bfs	bfs: add sanity check at bfs_fill_super()	2018-11-03 10:09:38 -07:00
btrfs	btrfs: Fix typos in comments and strings	2018-12-17 14:51:50 +01:00
cachefiles	fscache, cachefiles: remove redundant variable 'cache'	2018-11-30 16:00:58 +00:00
ceph	ceph: make 'nocopyfrom' a default mount option	2018-12-11 18:22:17 +01:00
cifs	File locking changes for v4.21	2018-12-27 17:12:30 -08:00
coda	vfs: change inode times to use struct timespec64	2018-06-05 16:57:31 -07:00
configfs	configfs: fix registered group removal	2018-07-17 06:14:07 -07:00
cramfs	Make the Cramfs code more robust against filesystem corruptions,	2018-10-30 12:46:25 -07:00
crypto	crypto: speck - remove Speck	2018-09-04 11:35:03 +08:00
debugfs	Revert "debugfs: inode: debugfs_create_dir uses mode permission from parent"	2018-06-12 20:52:16 -07:00
devpts	devpts: Convert to new IDA API	2018-08-21 23:54:17 -04:00
dlm	dlm: fix invalid cluster name warning	2018-12-03 15:30:24 -06:00
ecryptfs	ecryptfs_rename(): verify that lower dentries are still OK after lock_rename()	2018-10-09 23:33:17 -04:00
efivarfs	efivars: Call guid_parse() against guid_t type of variable	2018-07-22 14:13:44 +02:00
efs	…
exofs	fs/exofs: only use true/false for asignment of bool type variable	2018-10-18 02:04:59 -04:00
exportfs	exportfs: do not read dentry after free	2018-11-23 09:08:17 -05:00
ext2	\n	2018-12-27 17:00:35 -08:00
ext4	ext4: check for shutdown and r/o file system in ext4_write_inode()	2018-12-19 14:36:58 -05:00
f2fs	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
fat	fat: truncate inode timestamp updates in setattr	2018-10-31 08:54:14 -07:00
freevxfs	freevxfs_lookup(): use d_splice_alias()	2018-05-22 14:27:51 -04:00
fscache	fscache: fix race between enablement and dropping of object	2018-11-30 15:57:31 +00:00
fuse	fuse: continue to send FUSE_RELEASEDIR when FUSE_OPEN returns ENOSYS	2018-12-11 21:47:28 +01:00
gfs2	File locking changes for v4.21	2018-12-27 17:12:30 -08:00
hfs	hfs: do not free node before using	2018-11-30 14:56:14 -08:00
hfsplus	hfsplus: do not free node before using	2018-11-30 14:56:14 -08:00
hostfs	vfs: discard ATTR_ATTR_FLAG	2018-08-17 16:20:28 -07:00
hpfs	hpfs: remove unnecessary checks on the value of r when assigning error code	2018-08-25 12:42:33 -07:00
hugetlbfs	mm: zero out the vma in vma_init()	2018-08-22 10:52:44 -07:00
isofs	Update email address	2018-09-29 22:47:48 -04:00
jbd2	jbd2: clean up indentation issue, replace spaces with tab	2018-12-04 00:20:10 -05:00
jffs2	jffs2: Fix use of uninitialized delayed_work, lockdep breakage	2018-12-02 09:20:34 +01:00
jfs	jfs: remove redundant dquot_initialize() in jfs_evict_inode()	2018-09-20 09:28:49 -05:00
kernfs	mm: zero-seek shrinkers	2018-10-26 16:26:33 -07:00
lockd	fs/locks: merge posix_unblock_lock() and locks_delete_block()	2018-12-07 06:50:56 -05:00
minix	minix_lookup: use d_splice_alias()	2018-05-22 14:27:52 -04:00
nfs	File locking changes for v4.21	2018-12-27 17:12:30 -08:00
nfs_common	net: Drop pernet_operations::async	2018-03-27 13:18:09 -04:00
nfsd	File locking changes for v4.21	2018-12-27 17:12:30 -08:00
nilfs2	nilfs2: Use xa_erase_irq	2018-11-05 14:57:05 -05:00
nls	…
notify	fanotify: Use inode_is_open_for_write	2018-12-11 10:55:45 +01:00
ntfs	ntfs: don't open-code ERR_CAST	2018-10-12 22:46:50 -04:00
ocfs2	ocfs2: don't clear bh uptodate for block read	2018-12-28 12:11:46 -08:00
omfs	omfs_lookup(): report IO errors, use d_splice_alias()	2018-05-22 14:27:58 -04:00
openpromfs	fs/openpromfs: Use of_node_name_eq for node name comparisons	2018-11-18 13:35:19 -08:00
orangefs	Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-11-01 19:58:52 -07:00
overlayfs	Revert "ovl: relax permission checking on underlying layers"	2018-12-04 11:31:30 +01:00
proc	proc/sysctl: don't return ENOMEM on lookup when a table is unregistering	2018-12-13 20:59:44 -05:00
pstore	pstore/ram: Avoid NULL deref in ftrace merging failure path	2018-12-03 17:11:02 -08:00
qnx4	qnx4_lookup: use d_splice_alias()	2018-05-22 14:27:52 -04:00
qnx6	qnx6_lookup: switch to d_splice_alias()	2018-05-22 14:27:54 -04:00
quota	quota: Lock s_umount in exclusive mode for Q_XQUOTA{ON,OFF} quotactls.	2018-12-18 18:29:15 +01:00
ramfs	…
reiserfs	reiserfs: remove workaround code for GCC 3.x	2018-10-31 08:54:14 -07:00
romfs	romfs_lookup: switch to d_splice_alias()	2018-05-22 14:27:55 -04:00
squashfs	Squashfs: Compute expected length from inode size rather than block length	2018-08-02 09:34:02 -07:00
sysfs	sysfs: constify sysfs create/remove files harder	2018-12-03 18:18:19 +02:00
sysv	sysv: return 'err' instead of 0 in __sysv_write_inode	2018-11-10 08:02:40 -05:00
tracefs	tracefs: Annotate tracefs_ops with __ro_after_init	2018-07-31 11:32:44 -04:00
ubifs	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2018-12-27 13:53:32 -08:00
udf	\n	2018-12-27 17:00:35 -08:00
ufs	fs/ufs: use ktime_get_real_seconds for sb and cg timestamps	2018-08-17 16:20:27 -07:00
xfs	xfs: reallocate realtime summary cache on growfs	2018-12-21 18:45:18 -08:00
Kconfig	autofs: remove left-over autofs4 stubs	2018-06-11 08:22:34 -07:00
Kconfig.binfmt	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
Makefile	autofs: remove left-over autofs4 stubs	2018-06-11 08:22:34 -07:00
aio.c	for-linus-20181214	2018-12-14 12:18:30 -08:00
anon_inodes.c	anon_inode_getfile(): switch to alloc_file_pseudo()	2018-07-12 10:04:27 -04:00
attr.c	fs: Fix attr.c kernel-doc	2018-07-03 16:44:45 -04:00
bad_inode.c	get rid of 'opened' argument of ->atomic_open() - part 3	2018-07-12 10:04:20 -04:00
binfmt_aout.c	exec: introduce finalize_exec() before start_thread()	2018-04-11 10:28:37 -07:00
binfmt_elf.c	signal: Distinguish between kernel_siginfo and siginfo	2018-10-03 16:47:43 +02:00
binfmt_elf_fdpic.c	treewide: kmalloc() -> kmalloc_array()	2018-06-12 16:19:22 -07:00
binfmt_em86.c	…
binfmt_flat.c	exec: introduce finalize_exec() before start_thread()	2018-04-11 10:28:37 -07:00
binfmt_misc.c	turn filp_clone_open() into inline wrapper for dentry_open()	2018-07-10 23:29:03 -04:00
binfmt_script.c	…
block_dev.c	iov_iter: Use accessor function	2018-10-24 00:40:44 +01:00
buffer.c	for-linus-20181102	2018-11-02 11:25:48 -07:00
char_dev.c	block, char_dev: Use correct format specifier for unsigned ints	2018-03-15 17:59:24 +01:00
compat.c	ncpfs: remove compat functionality	2018-06-05 19:23:26 +02:00
compat_binfmt_elf.c	y2038: globally rename compat_time to old_time32	2018-08-27 14:48:48 +02:00
compat_ioctl.c	media updates for v4.20-rc1	2018-10-29 14:29:58 -07:00
coredump.c	signal: Distinguish between kernel_siginfo and siginfo	2018-10-03 16:47:43 +02:00
d_path.c	split d_path() and friends into a separate file	2018-03-29 15:07:46 -04:00
dax.c	dax: Fix unlock mismatch with updated API	2018-12-04 21:32:00 -08:00
dcache.c	mm: remove include/linux/bootmem.h	2018-10-31 08:54:16 -07:00
dcookies.c	fs: add do_lookup_dcookie() helper; remove in-kernel call to syscall	2018-04-02 20:15:39 +02:00
direct-io.c	fs: fix lost error code in dio_complete	2018-11-30 08:35:14 -07:00
drop_caches.c	…
eventfd.c	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
eventpoll.c	fs/eventpoll.c: simplify ep_is_linked() callers	2018-08-22 10:52:49 -07:00
exec.c	Revert "exec: make de_thread() freezable"	2018-12-04 16:04:20 +01:00
fcntl.c	signal: Distinguish between kernel_siginfo and siginfo	2018-10-03 16:47:43 +02:00
fhandle.c	…
file.c	fs/file: Replace synchronize_sched() with synchronize_rcu()	2018-11-27 09:21:39 -08:00
file_table.c	mm: reference totalram_pages and managed_pages once per function	2018-12-28 12:11:47 -08:00
filesystems.c	proc: introduce proc_create_single{,_data}	2018-05-16 07:23:35 +02:00
fs-writeback.c	fs: Convert writeback to XArray	2018-10-21 10:46:42 -04:00
fs_pin.c	…
fs_struct.c	…
inode.c	mm: don't reclaim inodes with many attached pages	2018-11-18 10:15:09 -08:00
internal.h	overlayfs update for 4.19	2018-08-21 18:19:09 -07:00
ioctl.c	vfs: rework data cloning infrastructure	2018-11-02 09:33:08 -07:00
iomap.c	Updates for 4.21:	2018-12-27 17:07:35 -08:00
libfs.c	fs, dax: prepare for dax-specific address_space_operations	2018-03-30 11:34:55 -07:00
locks.c	locks: Use inode_is_open_for_write	2018-12-17 07:19:46 -05:00
mbcache.c	treewide: kmalloc() -> kmalloc_array()	2018-06-12 16:19:22 -07:00
mount.h	…
mpage.c	mpage: mpage_readpages() should submit IO as read-ahead	2018-08-17 16:20:29 -07:00
namei.c	Revert "vfs: Allow userns root to call mknod on owned filesystems."	2018-12-22 14:18:34 -08:00
namespace.c	mnt: fix __detach_mounts infinite loop	2018-11-12 01:02:34 -06:00
no-block.c	…
nsfs.c	net: Export open_related_ns()	2018-02-15 15:34:42 -05:00
open.c	overlayfs update for 4.19	2018-08-21 18:19:09 -07:00
pipe.c	Merge branch 'work.open3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-08-13 19:58:36 -07:00
pnode.c	…
pnode.h	…
posix_acl.c	…
proc_namespace.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
read_write.c	vfs: allow some remap flags to be passed to vfs_clone_file_range	2018-12-04 08:50:49 -08:00
readdir.c	fs: add ksys_getdents64() helper; remove in-kernel calls to sys_getdents64()	2018-04-02 20:16:02 +02:00
select.c	y2038: globally rename compat_time to old_time32	2018-08-27 14:48:48 +02:00
seq_file.c	fs/seq_file.c: simplify seq_file iteration code and interface	2018-08-17 16:20:28 -07:00
signalfd.c	signal: Distinguish between kernel_siginfo and siginfo	2018-10-03 16:47:43 +02:00
splice.c	splice: don't read more than available pipe space	2018-12-04 08:50:49 -08:00
stack.c	…
stat.c	y2038: Remove newstat family from default syscall set	2018-08-29 15:42:20 +02:00
statfs.c	kernel: add kcompat_sys_{f,}statfs64()	2018-07-12 14:49:48 +01:00
super.c	fsnotify: add super block object type	2018-09-03 15:14:01 +02:00
sync.c	Changes for this release:	2018-04-04 12:44:02 -07:00
timerfd.c	y2038: globally rename compat_time to old_time32	2018-08-27 14:48:48 +02:00
userfaultfd.c	Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-12-26 13:07:19 -08:00
utimes.c	y2038: utimes: Rework #ifdef guards for compat syscalls	2018-08-29 15:42:23 +02:00
xattr.c	sysfs: Do not return POSIX ACL xattrs via listxattr	2018-09-18 07:30:48 -04:00