David Rientjes 5cec38ac86 fs, seq_file: fallback to vmalloc instead of oom kill processes ... Since commit 058504edd0 ("fs/seq_file: fallback to vmalloc allocation"), seq_buf_alloc() falls back to vmalloc() when the kmalloc() for contiguous memory fails. This was done to address order-4 slab allocations for reading /proc/stat on large machines and noticed because PAGE_ALLOC_COSTLY_ORDER < 4, so there is no infinite loop in the page allocator when allocating new slab for such high-order allocations. Contiguous memory isn't necessary for caller of seq_buf_alloc(), however. Other GFP_KERNEL high-order allocations that are <= PAGE_ALLOC_COSTLY_ORDER will simply loop forever in the page allocator and oom kill processes as a result. We don't want to kill processes so that we can allocate contiguous memory in situations when contiguous memory isn't necessary. This patch does the kmalloc() allocation with __GFP_NORETRY for high-order allocations. This still utilizes memory compaction and direct reclaim in the allocation path, the only difference is that it will fail immediately instead of oom kill processes when out of memory. [akpm@linux-foundation.org: add comment] Signed-off-by: David Rientjes <rientjes@google.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-12-13 12:42:49 -08:00
..
9p	assorted conversions to %p[dD]	2014-11-19 13:01:20 -05:00
adfs	adfs: add __printf verification, fix format/argument mismatches	2014-08-08 15:57:24 -07:00
affs	assorted conversions to %p[dD]	2014-11-19 13:01:20 -05:00
afs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2014-12-11 14:27:06 -08:00
autofs4	assorted conversions to %p[dD]	2014-11-19 13:01:20 -05:00
befs	assorted conversions to %p[dD]	2014-11-19 13:01:20 -05:00
bfs	fs/bfs: use bfs prefix for dump_imap	2014-08-08 15:57:24 -07:00
btrfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2014-12-12 11:15:23 -08:00
cachefiles	assorted conversions to %p[dD]	2014-11-19 13:01:20 -05:00
ceph	Merge branch 'iov_iter' into for-next	2014-12-08 20:39:29 -05:00
cifs	Merge branch 'akpm' (patchbomb from Andrew)	2014-12-10 18:34:42 -08:00
coda	move d_rcu from overlapping d_child to overlapping d_alias	2014-11-03 15:20:29 -05:00
configfs	assorted conversions to %p[dD]	2014-11-19 13:01:20 -05:00
cramfs	fs/cramfs/inode.c: use linux/uaccess.h	2014-08-08 15:57:25 -07:00
debugfs	Merge tag 'trace-seq-file-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into for-next	2014-11-19 13:02:53 -05:00
devpts
dlm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-10 16:10:49 -08:00
ecryptfs	kill f_dentry uses	2014-11-19 13:01:25 -05:00
efivarfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-10 16:10:49 -08:00
efs	fs/efs/namei.c: return is not a function	2014-08-08 15:57:18 -07:00
exofs	Boaz Harrosh - Fix broken email address	2014-10-19 20:22:32 +03:00
exportfs	move d_rcu from overlapping d_child to overlapping d_alias	2014-11-03 15:20:29 -05:00
ext2	ext2: Convert to private i_dquot field	2014-11-10 10:06:10 +01:00
ext3	ext3: Convert to private i_dquot field	2014-11-10 10:06:10 +01:00
ext4	Lots of bugs fixes, including Zheng and Jan's extent status shrinker	2014-12-12 09:28:03 -08:00
f2fs	f2fs: avoid to ra unneeded blocks in recover flow	2014-12-08 14:19:09 -08:00
fat	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-10 16:10:49 -08:00
freevxfs
fscache	fs/fscache/object-list.c: use __seq_open_private()	2014-10-13 17:52:21 +01:00
fuse	assorted conversions to %p[dD]	2014-11-19 13:01:20 -05:00
gfs2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-10 16:10:49 -08:00
hfs	fs/hfs/catalog.c: fix comparison bug in hfs_cat_keycmp	2014-12-10 17:41:16 -08:00
hfsplus
hostfs	hostfs: support rename flags	2014-08-07 14:40:09 -04:00
hpfs	fs/hpfs/dnode.c: fix suspect code indent	2014-08-08 15:57:22 -07:00
hppfs	vfs: make first argument of dir_context.actor typed	2014-10-31 17:48:54 -04:00
hugetlbfs	mm: convert i_mmap_mutex to rwsem	2014-12-13 12:42:45 -08:00
isofs	isofs: avoid unused function warning	2014-11-19 13:09:37 -05:00
jbd	jbd: Deletion of an unnecessary check before the function call "iput"	2014-11-18 10:15:29 +01:00
jbd2	Lots of bugs fixes, including Zheng and Jan's extent status shrinker	2014-12-12 09:28:03 -08:00
jffs2	[jffs2] kill wbuf_queued/wbuf_dwork_lock	2014-10-09 02:39:01 -04:00
jfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-10 16:10:49 -08:00
kernfs	switch d_materialise_unique() users to d_splice_alias()	2014-11-19 13:01:20 -05:00
lockd	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-10 16:10:49 -08:00
logfs	fs/logfs/readwrite.c: kernel-doc warning fixes	2014-08-06 18:01:12 -07:00
minix	minix zmap block counts calculation fix	2014-08-08 15:57:20 -07:00
ncpfs	Merge branch 'akpm' (patchbomb from Andrew)	2014-12-10 18:34:42 -08:00
nfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-10 16:10:49 -08:00
nfs_common	lockd: move lockd's grace period handling into its own module	2014-09-17 16:33:11 -04:00
nfsd	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2014-12-11 14:27:06 -08:00
nilfs2	nilfs2: fix the nilfs_iget() vs. nilfs_new_inode() races	2014-12-10 17:41:16 -08:00
nls
notify	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-10 16:10:49 -08:00
ntfs	assorted conversions to %p[dD]	2014-11-19 13:01:20 -05:00
ocfs2	Merge branch 'akpm' (patchbomb from Andrew)	2014-12-10 18:34:42 -08:00
omfs	FS/OMFS: block number sanity check during fill_super operation	2014-10-14 02:18:22 +02:00
openpromfs
overlayfs	Merge branch 'iov_iter' into for-next	2014-12-08 20:39:29 -05:00
proc	Merge branch 'akpm' (patchbomb from Andrew)	2014-12-10 18:34:42 -08:00
pstore	pstore-ram: Allow optional mapping with pgprot_noncached	2014-12-11 13:38:31 -08:00
qnx4
qnx6	fs/qnx6: update debugging to current functions	2014-08-08 15:57:26 -07:00
quota	vfs: Remove i_dquot field from inode	2014-11-10 10:06:18 +01:00
ramfs	fs/ramfs/file-nommu.c: replace count*size kzalloc by kcalloc	2014-08-08 15:57:18 -07:00
reiserfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-12-12 10:08:06 -08:00
romfs	fs/romfs/super.c: add blank line after declarations	2014-08-08 15:57:25 -07:00
squashfs	fs/squashfs/super.c: logging cleanup	2014-08-06 18:01:13 -07:00
sysfs
sysv
ubifs	UBIFS: fix a couple bugs in UBIFS xattr length calculation	2014-11-07 12:32:22 +02:00
udf	udf: One function call less in udf_fill_super() after error detection	2014-11-19 21:56:06 +01:00
ufs	fs/ufs/balloc.c: remove unused variable	2014-10-14 02:18:20 +02:00
xfs	xfs: update for 3.19-rc1	2014-12-12 09:48:17 -08:00
aio.c	Merge git://git.kvack.org/~bcrl/aio-fixes	2014-11-25 18:55:44 -08:00
anon_inodes.c
attr.c
bad_inode.c	bad_inode: add ->rename2()	2014-08-07 14:40:09 -04:00
binfmt_aout.c	assorted conversions to %p[dD]	2014-11-19 13:01:20 -05:00
binfmt_elf.c	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2014-12-11 17:56:37 -08:00
binfmt_elf_fdpic.c	handle suicide on late failure exits in execve() in search_binary_handler()	2014-10-09 02:39:00 -04:00
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c	fs/binfmt_misc.c: use GFP_KERNEL instead of GFP_USER	2014-12-10 17:41:12 -08:00
binfmt_script.c
binfmt_som.c
block_dev.c	fs: add freeze_super/thaw_super fs hooks	2014-11-17 10:35:17 +00:00
buffer.c	fs: clarify rate limit suppressed buffer I/O errors	2014-10-21 13:55:11 -06:00
char_dev.c	fs/char_dev.c: remove pointless assignment from __register_chrdev_region()	2014-12-10 17:41:04 -08:00
compat.c	vfs: make first argument of dir_context.actor typed	2014-10-31 17:48:54 -04:00
compat_binfmt_elf.c
compat_ioctl.c
coredump.c	coredump: add %i/%I in core_pattern to report the tid of the crashed thread	2014-10-14 02:18:21 +02:00
dcache.c	Merge branch 'iov_iter' into for-next	2014-12-08 20:39:29 -05:00
dcookies.c
direct-io.c	fuse: honour max_read and max_write in direct_io mode	2014-09-26 21:16:51 -04:00
drop_caches.c	mm: vmscan: invoke slab shrinkers from shrink_zone()	2014-12-13 12:42:48 -08:00
eventfd.c	fs: Convert show_fdinfo functions to void	2014-11-05 14:13:23 -05:00
eventpoll.c	fs: Convert show_fdinfo functions to void	2014-11-05 14:13:23 -05:00
exec.c	fs: Do not include mpx.h in exec.c	2014-11-18 02:01:40 +01:00
fcntl.c	security: make security_file_set_fowner, f_setown and __f_setown void return	2014-09-09 16:01:36 -04:00
fhandle.c
file.c	fs/file.c: replace get_unused_fd() with get_unused_fd_flags(0)	2014-12-10 17:41:10 -08:00
file_table.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-10-13 11:28:42 +02:00
filesystems.c
fs-writeback.c
fs_pin.c	make fs/{namespace,super}.c forget about acct.h	2014-08-07 14:40:09 -04:00
fs_struct.c
inode.c	mm: convert i_mmap_mutex to rwsem	2014-12-13 12:42:45 -08:00
internal.h	vfs: export __inode_permission() to modules	2014-10-24 00:14:35 +02:00
ioctl.c	fs: add freeze_super/thaw_super fs hooks	2014-11-17 10:35:17 +00:00
Kconfig	overlay filesystem	2014-10-24 00:14:38 +02:00
Kconfig.binfmt	binfmt_elf: allow arch code to examine PT_LOPROC ... PT_HIPROC headers	2014-11-24 07:45:02 +01:00
libfs.c	move d_rcu from overlapping d_child to overlapping d_alias	2014-11-03 15:20:29 -05:00
locks.c	locks: flock_make_lock should return a struct file_lock (or PTR_ERR)	2014-10-07 14:06:13 -04:00
Makefile	ovl: rename filesystem type to "overlay"	2014-11-20 16:39:59 +01:00
mbcache.c
mount.h	vfs: Add a function to lazily unmount all mounts from any dentry.	2014-10-09 02:38:55 -04:00
mpage.c	vfs: guard end of device for mpage interface	2014-10-09 22:25:53 -04:00
namei.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-11-02 10:28:43 -08:00
namespace.c	vfs: introduce clone_private_mount()	2014-10-24 00:14:36 +02:00
no-block.c
open.c	new helper: audit_file()	2014-11-19 13:01:26 -05:00
pipe.c
pnode.c	get rid of propagate_umount() mistakenly treating slaves as busy.	2014-08-30 18:31:41 -04:00
pnode.h
posix_acl.c
proc_namespace.c
read_write.c	cachefiles_write_page(): switch to __kernel_write()	2014-10-09 02:39:05 -04:00
readdir.c	vfs: make first argument of dir_context.actor typed	2014-10-31 17:48:54 -04:00
select.c
seq_file.c	fs, seq_file: fallback to vmalloc instead of oom kill processes	2014-12-13 12:42:49 -08:00
signalfd.c	fs: Convert show_fdinfo functions to void	2014-11-05 14:13:23 -05:00
splice.c	vfs: export do_splice_direct() to modules	2014-10-24 00:14:35 +02:00
stack.c	fs: fix comment for 'CONFIG_LBADF'	2014-08-26 09:35:56 +02:00
stat.c
statfs.c
super.c	vfs: Remove i_dquot field from inode	2014-11-10 10:06:18 +01:00
sync.c	kill f_dentry uses	2014-11-19 13:01:25 -05:00
timerfd.c	fs: Convert show_fdinfo functions to void	2014-11-05 14:13:23 -05:00
utimes.c
xattr.c	new helper: audit_file()	2014-11-19 13:01:26 -05:00