David Rientjes 1403830294 fs, proc: unconditional cond_resched when reading smaps ...

If there are large numbers of hugepages to iterate while reading
/proc/pid/smaps, the page walk never does cond_resched().  On archs
without split pmd locks, there can be significant and observable
contention on mm->page_table_lock which cause lengthy delays without
rescheduling.

Always reschedule in smaps_pte_range() if necessary since the pagewalk
iteration can be expensive.

Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1708211405520.131071@chino.kir.corp.google.com
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2017-09-08 18:26:47 -07:00

..

9p

Merge branch 'akpm' (patches from Andrew)

2017-09-06 20:49:49 -07:00

adfs

…

affs

fs: convert a pile of fsync routines to errseq_t based reporting

2017-08-01 08:39:29 -04:00

afs

Merge branch 'akpm' (patches from Andrew)

2017-09-06 20:49:49 -07:00

autofs4

Fix up over-eager 'wait_queue_t' renaming

2017-07-10 11:40:19 -07:00

befs

Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-07-15 12:00:42 -07:00

bfs

bfs: fix sanity checks for empty files

2017-07-12 16:26:00 -07:00

btrfs

Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block

2017-09-07 11:59:42 -07:00

cachefiles

sched/wait: Disambiguate wq_entry->task_list and wq_head->task_list naming

2017-06-20 12:19:14 +02:00

ceph

Merge branch 'akpm' (patches from Andrew)

2017-09-06 20:49:49 -07:00

cifs

enable xattr support for smb3 and also a bugfix

2017-09-07 16:06:14 -07:00

coda

fs: implement vfs_iter_write using do_iter_write

2017-06-29 17:49:23 -04:00

configfs

configfs: Introduce config_item_get_unless_zero()

2017-06-12 13:20:20 +02:00

cramfs

…

crypto

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

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

File locking related changes for v4.14

2017-09-06 13:43:26 -07:00

ecryptfs

ecryptfs: convert to file_write_and_wait in ->fsync

2017-08-03 14:20:22 -04:00

efivarfs

VFS: Kill off s_options and helpers

2017-07-11 06:09:21 -04:00

efs

…

exofs

Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block

2017-09-07 11:59:42 -07:00

exportfs

…

ext2

dax: use common 4k zero page for dax mmap reads

2017-09-06 17:27:24 -07:00

ext4

Merge branch 'quota_scaling' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2017-09-07 15:19:35 -07:00

f2fs

mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY

2017-09-08 18:26:46 -07:00

fat

…

freevxfs

…

fscache

mm: remove nr_pages argument from pagevec_lookup{,_range}()

2017-09-06 17:27:27 -07:00

fuse

Writeback error handling fixes for v4.14

2017-09-06 14:11:03 -07:00

gfs2

Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block

2017-09-07 11:59:42 -07:00

hfs

fs: convert a pile of fsync routines to errseq_t based reporting

2017-08-01 08:39:29 -04:00

hfsplus

Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block

2017-09-07 11:59:42 -07:00

hostfs

fs: convert a pile of fsync routines to errseq_t based reporting

2017-08-01 08:39:29 -04:00

hpfs

fs: convert a pile of fsync routines to errseq_t based reporting

2017-08-01 08:39:29 -04:00

hugetlbfs

mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY

2017-09-08 18:26:46 -07:00

isofs

isofs: Delete an unnecessary variable initialisation in isofs_read_inode()

2017-08-23 18:54:03 +02:00

jbd2

Writeback error handling fixes (pile #2)

2017-07-07 19:38:17 -07:00

jffs2

fs: convert a pile of fsync routines to errseq_t based reporting

2017-08-01 08:39:29 -04:00

jfs

Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block

2017-09-07 11:59:42 -07:00

kernfs

Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block

2017-09-07 11:59:42 -07:00

lockd

sunrpc: mark all struct svc_version instances as const

2017-07-13 15:58:03 -04:00

minix

Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-07-08 10:50:54 -07:00

ncpfs

fs: convert a pile of fsync routines to errseq_t based reporting

2017-08-01 08:39:29 -04:00

nfs

Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block

2017-09-07 11:59:42 -07:00

nfs_common

…

nfsd

annotate RWF_... flags

2017-08-31 17:32:38 -04:00

nilfs2

Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block

2017-09-07 11:59:42 -07:00

nls

…

notify

fsnotify: make dnotify_fsnotify_ops const

2017-08-30 16:02:48 +02:00

ntfs

fs: convert a pile of fsync routines to errseq_t based reporting

2017-08-01 08:39:29 -04:00

ocfs2

Merge branch 'quota_scaling' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2017-09-07 15:19:35 -07:00

omfs

omfs: Implement show_options

2017-07-06 03:31:46 -04:00

openpromfs

…

orangefs

Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-07-15 12:00:42 -07:00

overlayfs

overlayfs, locking: Remove smp_mb__before_spinlock() usage

2017-08-10 12:29:02 +02:00

proc

fs, proc: unconditional cond_resched when reading smaps

2017-09-08 18:26:47 -07:00

pstore

Revert "pstore: Honor dmesg_restrict sysctl on dmesg dumps"

2017-08-17 16:29:19 -07:00

qnx4

…

qnx6

…

quota

Merge branch 'quota_scaling' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2017-09-07 15:19:35 -07:00

ramfs

mm: make pagevec_lookup() update index

2017-09-06 17:27:26 -07:00

reiserfs

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2017-09-07 14:53:17 -07:00

romfs

…

squashfs

…

sysfs

…

sysv

mm: drop "wait" parameter from write_one_page()

2017-07-05 18:44:22 -04:00

tracefs

VFS: Don't use save/replace_mount_options if not using generic_show_options

2017-07-06 03:31:46 -04:00

ubifs

mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY

2017-09-08 18:26:46 -07:00

udf

fs-udf: Delete an error message for a failed memory allocation in two functions

2017-08-16 16:43:23 +02:00

ufs

Writeback error handling fixes (pile #1)

2017-07-07 18:39:15 -07:00

xfs

Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block

2017-09-07 11:59:42 -07:00

aio.c

mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY

2017-09-08 18:26:46 -07:00

anon_inodes.c

…

attr.c

…

bad_inode.c

…

binfmt_aout.c

…

binfmt_elf_fdpic.c

binfmt: Introduce secureexec flag

2017-08-01 12:03:05 -07:00

binfmt_elf.c

This series has the ultimate goal of providing a sane stack rlimit when

2017-09-07 20:35:29 -07:00

binfmt_em86.c

…

binfmt_flat.c

exec: Rename bprm->cred_prepared to called_set_creds

2017-08-01 12:02:48 -07:00

binfmt_misc.c

fs: constify tree_descr arrays passed to simple_fill_super()

2017-04-26 23:54:06 -04:00

binfmt_script.c

…

block_dev.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

buffer.c

Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block

2017-09-07 11:59:42 -07:00

char_dev.c

char_dev: order /proc/devices by major number

2017-07-17 15:28:50 +02:00

compat_binfmt_elf.c

…

compat_ioctl.c

media: get rid of removed DMX_GET_CAPS and DMX_SET_SOURCE leftovers

2017-09-05 08:25:07 -04:00

compat.c

…

coredump.c

…

dax.c

dax: initialize variable pfn before using it

2017-09-06 17:27:24 -07:00

dcache.c

Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-07-15 12:00:42 -07:00

dcookies.c

…

direct-io.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

drop_caches.c

…

eventfd.c

There has been a fair amount of activity in the docs tree this time

2017-07-03 21:13:25 -07:00

eventpoll.c

epoll: fix race between ep_poll_callback(POLLFREE) and ep_free()/ep_remove()

2017-09-01 13:07:35 -07:00

exec.c

exec: Consolidate pdeath_signal clearing

2017-08-01 12:03:14 -07:00

fcntl.c

vfs: fix flock compat thinko

2017-07-07 13:48:18 -07:00

fhandle.c

…

file_table.c

fs: new infrastructure for writeback error handling and reporting

2017-07-06 07:02:25 -04:00

file.c

fs/file.c: replace alloc_fdmem() with kvmalloc() alternative

2017-07-06 16:24:30 -07:00

filesystems.c

Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-07-15 12:00:42 -07:00

fs_pin.c

sched/wait: Disambiguate wq_entry->task_list and wq_head->task_list naming

2017-06-20 12:19:14 +02:00

fs_struct.c

…

fs-writeback.c

writeback: rework wb_[dec|inc]_stat family of functions

2017-07-12 16:26:05 -07:00

inode.c

xfs: evict all inodes involved with log redo item

2017-09-01 10:55:30 -07:00

internal.h

xfs: evict all inodes involved with log redo item

2017-09-01 10:55:30 -07:00

ioctl.c

…

iomap.c

Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block

2017-09-07 11:59:42 -07:00

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

…

mbcache.c

ext4: xattr inode deduplication

2017-06-22 11:44:55 -04:00

mount.h

Now that IPC and other changes have landed, enable manual markings for

2017-07-19 08:55:18 -07:00

mpage.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

namei.c

Now that IPC and other changes have landed, enable manual markings for

2017-07-19 08:55:18 -07:00

namespace.c

Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-07-15 12:00:42 -07:00

no-block.c

…

nsfs.c

VFS: Provide empty name qstr

2017-07-06 03:27:09 -04:00

open.c

Writeback error handling fixes (pile #2)

2017-07-07 19:38:17 -07:00

pipe.c

VFS: Provide empty name qstr

2017-07-06 03:27:09 -04:00

pnode.c

mnt: Make propagate_umount less slow for overlapping mount propagation trees

2017-05-23 08:41:17 -05:00

pnode.h

…

posix_acl.c

…

proc_namespace.c

…

read_write.c

annotate RWF_... flags

2017-08-31 17:32:38 -04:00

readdir.c

…

select.c

fs/select: Fix memory corruption in compat_get_fd_set()

2017-08-28 16:09:19 -07:00

seq_file.c

mm: introduce kv[mz]alloc helpers

2017-05-08 17:15:12 -07:00

signalfd.c

sched/wait: Rename wait_queue_t => wait_queue_entry_t

2017-06-20 12:18:27 +02:00

splice.c

fs: implement vfs_iter_write using do_iter_write

2017-06-29 17:49:23 -04:00

stack.c

…

stat.c

fs: Provide __inode_get_bytes()

2017-08-17 22:06:03 +02:00

statfs.c

Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-07-08 10:50:54 -07:00

super.c

quota: Convert dqio_mutex to rwsem

2017-08-17 18:52:48 +02:00

sync.c

Merge branch 'akpm' (patches from Andrew)

2017-09-06 20:49:49 -07:00

timerfd.c

timerfd: Use get_itimerspec64() and put_itimerspec64()

2017-06-30 04:14:38 -04:00

userfaultfd.c

userfaultfd: non-cooperative: closing the uffd without triggering SIGBUS

2017-09-08 18:26:47 -07:00

utimes.c

…

xattr.c

treewide: use kv[mz]alloc* rather than opencoded variants

2017-05-08 17:15:13 -07:00