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Mike Kravetz 8f251a3d5c hugetlb: convert page_huge_active() HPageMigratable flag 
Use the new hugetlb page specific flag HPageMigratable to replace the
page_huge_active interfaces.  By it's name, page_huge_active implied that
a huge page was on the active list.  However, that is not really what code
checking the flag wanted to know.  It really wanted to determine if the
huge page could be migrated.  This happens when the page is actually added
to the page cache and/or task page table.  This is the reasoning behind
the name change.

The VM_BUG_ON_PAGE() calls in the *_huge_active() interfaces are not
really necessary as we KNOW the page is a hugetlb page.  Therefore, they
are removed.

The routine page_huge_active checked for PageHeadHuge before testing the
active bit.  This is unnecessary in the case where we hold a reference or
lock and know it is a hugetlb head page.  page_huge_active is also called
without holding a reference or lock (scan_movable_pages), and can race
with code freeing the page.  The extra check in page_huge_active shortened
the race window, but did not prevent the race.  Offline code calling
scan_movable_pages already deals with these races, so removing the check
is acceptable.  Add comment to racy code.

[songmuchun@bytedance.com: remove set_page_huge_active() declaration from include/linux/hugetlb.h]
  Link: https://lkml.kernel.org/r/CAMZfGtUda+KoAZscU0718TN61cSFwp4zy=y2oZ=+6Z2TAZZwng@mail.gmail.com

Link: https://lkml.kernel.org/r/20210122195231.324857-3-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2021-02-24 13:38:34 -08:00
..
9p fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
adfs fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
affs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
afs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
autofs fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
befs
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bfs fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
btrfs mm/filemap: rename generic_file_buffered_read to filemap_read 2021-02-24 13:38:28 -08:00
cachefiles idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
ceph idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
cifs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
coda fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
configfs fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
cramfs cramfs: use %pD instead of messing with file_dentry()->d_name 2021-01-05 23:02:47 -05:00
crypto inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
debugfs fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
devpts
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dlm fs: dlm: check on existing node address 2020-11-10 12:14:20 -06:00
ecryptfs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
efivarfs fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
efs
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erofs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
exfat idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
exportfs exportfs: Add a function to return the raw output from fh_to_dentry() 2020-12-09 09:39:38 -05:00
ext2 fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
ext4 idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
f2fs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
fat idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
freevxfs
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fscache
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fuse mm/filemap: remove unused parameter and change to void type for replace_page_cache_page() 2021-02-24 13:38:27 -08:00
gfs2 Changes in gfs2: 2021-02-23 14:04:04 -08:00
hfs fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
hfsplus idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
hostfs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
hpfs fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
hugetlbfs hugetlb: convert page_huge_active() HPageMigratable flag 2021-02-24 13:38:34 -08:00
iomap for-5.12/block-2021-02-17 2021-02-21 11:02:48 -08:00
isofs isofs: handle large user and group ID 2021-02-03 19:05:52 +01:00
jbd2 block: use an on-stack bio in blkdev_issue_flush 2021-01-27 09:51:48 -07:00
jffs2 idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
jfs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
kernfs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
lockd SUNRPC: Make trace_svc_process() display the RPC procedure symbolically 2021-01-25 09:36:23 -05:00
minix fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
nfs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
nfs_common NFSv4_2: SSC helper should use its own config. 2021-01-28 10:55:37 -05:00
nfsd idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
nilfs2 idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
nls
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notify idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
ntfs ntfs: check for valid standard information attribute 2021-02-24 13:38:26 -08:00
ocfs2 ocfs2: simplify the calculation of variables 2021-02-24 13:38:26 -08:00
omfs fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
openpromfs
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orangefs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
overlayfs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
proc vmalloc: remove redundant NULL check 2021-02-24 13:38:30 -08:00
pstore It has been a relatively quiet cycle in docsland. 2021-02-22 10:57:46 -08:00
qnx4
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qnx6
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quota quota: Fix memory leak when handling corrupted quota file 2021-01-05 14:42:18 +01:00
ramfs ramfs: support O_TMPFILE 2021-02-24 13:38:26 -08:00
reiserfs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
romfs Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-24 12:26:05 -07:00
squashfs squashfs: add more sanity checks in xattr id lookup 2021-02-09 17:26:44 -08:00
sysfs sysfs: Support zapping of binary attr mmaps 2021-01-12 14:26:31 +01:00
sysv fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
tracefs fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
ubifs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
udf idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
ufs fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
unicode
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vboxsf fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
verity idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
xfs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
zonefs idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
Kconfig Highlights: 2021-02-21 10:22:20 -08:00
Kconfig.binfmt Merge branch 'work.elf-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2021-02-21 09:29:23 -08:00
Makefile fs: Remove dcookies support 2021-01-29 10:06:46 +05:30
aio.c Merge branch 'akpm' (patches from Andrew) 2020-12-15 12:53:37 -08:00
anon_inodes.c fs: anon_inodes: rephrase to appropriate kernel-doc 2021-01-15 12:17:25 -05:00
attr.c ima: handle idmapped mounts 2021-01-24 14:27:20 +01:00
bad_inode.c fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
binfmt_aout.c
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binfmt_elf.c Merge branch 'parisc-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2021-02-21 13:20:41 -08:00
binfmt_elf_fdpic.c Merge branch 'parisc-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2021-02-21 13:20:41 -08:00
binfmt_em86.c
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binfmt_flat.c
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binfmt_misc.c binfmt_misc: pass binfmt_misc flags to the interpreter 2021-02-15 18:28:30 +01:00
binfmt_script.c
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block_dev.c fs: delete repeated words in comments 2021-02-24 13:38:26 -08:00
buffer.c fs: buffer: use raw page_memcg() on locked page 2021-02-24 13:38:30 -08:00
char_dev.c
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compat_binfmt_elf.c get rid of COMPAT_ELF_EXEC_PAGESIZE 2021-01-06 08:42:51 -05:00
coredump.c open: handle idmapped mounts in do_truncate() 2021-01-24 14:27:18 +01:00
d_path.c fs: fix NULL dereference due to data race in prepend_path() 2020-10-14 14:54:45 -07:00
dax.c mm: provide a saner PTE walking API for modules 2021-02-09 07:05:44 -05:00
dcache.c fs: delete repeated words in comments 2021-02-24 13:38:26 -08:00
direct-io.c fs: delete repeated words in comments 2021-02-24 13:38:26 -08:00
drop_caches.c
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eventfd.c eventfd: Export eventfd_ctx_do_read() 2020-11-15 09:49:10 -05:00
eventpoll.c kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE 2021-02-16 09:59:41 +01:00
exec.c fs: delete repeated words in comments 2021-02-24 13:38:26 -08:00
fcntl.c idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
fhandle.c fs: delete repeated words in comments 2021-02-24 13:38:26 -08:00
file.c fs: provide locked helper variant of close_fd_get_file() 2021-02-01 10:02:42 -07:00
file_table.c epoll: take epitem list out of struct file 2020-10-25 20:02:08 -04:00
filesystems.c
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fs-writeback.c fs: improve comments for writeback_single_inode() 2021-01-13 17:26:50 +01:00
fs_context.c
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fs_parser.c fs_parse: mark fs_param_bad_value() as static 2020-10-13 18:38:27 -07:00
fs_pin.c
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fs_struct.c
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fs_types.c
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fsopen.c
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init.c init: handle idmapped mounts 2021-01-24 14:27:19 +01:00
inode.c idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
internal.h idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
io-wq.c io-wq: clear out worker ->fs and ->files 2021-02-12 14:02:54 -07:00
io-wq.h io_uring: provide FIFO ordering for task_work 2021-02-10 07:28:43 -07:00
io_uring.c for-5.12/io_uring-2021-02-17 2021-02-21 11:10:39 -08:00
ioctl.c
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kernel_read_file.c
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libfs.c idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
locks.c Merge branch 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2020-12-15 19:29:43 -08:00
mbcache.c
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mount.h mount: make {lock,unlock}_mount_hash() static 2021-01-24 14:29:34 +01:00
mpage.c
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namei.c idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
namespace.c fs: introduce MOUNT_ATTR_IDMAP 2021-01-24 14:43:45 +01:00
no-block.c
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nsfs.c
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open.c idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
pipe.c fs: delete repeated words in comments 2021-02-24 13:38:26 -08:00
pnode.c
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pnode.h fs/namespace.c: WARN if mnt_count has become negative 2020-12-10 17:33:17 -05:00
posix_acl.c fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
proc_namespace.c fs: introduce MOUNT_ATTR_IDMAP 2021-01-24 14:43:45 +01:00
read_write.c teach sendfile(2) to handle send-to-pipe directly 2021-01-25 23:29:36 -05:00
readdir.c
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remap_range.c ioctl: handle idmapped mounts 2021-01-24 14:27:19 +01:00
select.c poll: fix performance regression due to out-of-line __put_user() 2021-01-08 11:06:29 -08:00
seq_file.c fs: fix kernel-doc markups 2021-01-21 14:06:00 -07:00
signalfd.c
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splice.c for-5.12/block-2021-02-17 2021-02-21 11:02:48 -08:00
stack.c
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stat.c fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
statfs.c s390,alpha: switch to 64-bit ino_t 2021-02-13 17:17:53 +01:00
super.c It has been a relatively quiet cycle in docsland. 2021-02-22 10:57:46 -08:00
sync.c
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timerfd.c
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userfaultfd.c userfaultfd: use secure anon inodes for userfaultfd 2021-01-14 17:40:57 -05:00
utimes.c utimes: handle idmapped mounts 2021-01-24 14:27:18 +01:00
xattr.c namei: handle idmapped mounts in may_*() helpers 2021-01-24 14:27:17 +01:00