Rafael J. Wysocki 8314418629 Freezer: make kernel threads nonfreezable by default ... Currently, the freezer treats all tasks as freezable, except for the kernel threads that explicitly set the PF_NOFREEZE flag for themselves. This approach is problematic, since it requires every kernel thread to either set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't care for the freezing of tasks at all. It seems better to only require the kernel threads that want to or need to be frozen to use some freezer-related code and to remove any freezer-related code from the other (nonfreezable) kernel threads, which is done in this patch. The patch causes all kernel threads to be nonfreezable by default (ie. to have PF_NOFREEZE set by default) and introduces the set_freezable() function that should be called by the freezable kernel threads in order to unset PF_NOFREEZE. It also makes all of the currently freezable kernel threads call set_freezable(), so it shouldn't cause any (intentional) change of behaviour to appear. Additionally, it updates documentation to describe the freezing of tasks more accurately. [akpm@linux-foundation.org: build fixes] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-07-17 10:23:02 -07:00
..
9p	9p: re-enable mount time debug option	2007-07-14 15:14:14 -05:00
adfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
affs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
afs	AFS: drop explicit extern	2007-07-16 09:05:43 -07:00
autofs	Replace pid_t in autofs with struct pid reference	2007-05-11 08:29:36 -07:00
autofs4	Fix some coding-style errors in autofs	2007-05-11 08:29:36 -07:00
befs	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
bfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
cifs	Freezer: make kernel threads nonfreezable by default	2007-07-17 10:23:02 -07:00
coda	wrong order of arguments of ->readdir()	2007-07-15 16:40:51 -07:00
configfs	configfs: config item dependancies.	2007-07-10 17:18:59 -07:00
cramfs	mm: make read_cache_page synchronous	2007-05-07 12:12:51 -07:00
debugfs	debugfs: add rename for debugfs files	2007-07-11 16:09:00 -07:00
devpts	devpts: add fsnotify create event	2007-05-08 11:14:59 -07:00
dlm	configfs: Convert subsystem semaphore to mutex	2007-07-10 17:10:56 -07:00
ecryptfs	sysfs: kill unnecessary attribute->owner	2007-07-11 16:09:06 -07:00
efs	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
exportfs	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
ext2	ext2: statfs speed up	2007-07-16 09:05:52 -07:00
ext3	ext3: statfs speed up	2007-07-16 09:05:52 -07:00
ext4	ext4: statfs speed up	2007-07-16 09:05:52 -07:00
fat	fat: Fix the race of read/write the FAT12 entry	2007-07-16 10:31:01 -07:00
freevxfs	vxfs warning fixes	2007-07-16 09:05:41 -07:00
fuse	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
gfs2	Remove capability.h from mm.h	2007-07-16 09:05:45 -07:00
hfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
hfsplus	HFS+: add custom dentry hash and comparison operations	2007-07-16 09:05:49 -07:00
hostfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
hpfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
hppfs	[PATCH] Mark struct super_operations const	2007-02-12 09:48:47 -08:00
hugetlbfs	hugetlbfs: handle empty options string	2007-07-16 09:05:46 -07:00
isofs	remove useless tolower in isofs	2007-07-16 09:05:43 -07:00
jbd	is_power_of_2(): jbd	2007-07-16 09:05:48 -07:00
jbd2	is_power_of_2(): jbd	2007-07-16 09:05:48 -07:00
jffs2	Freezer: make kernel threads nonfreezable by default	2007-07-17 10:23:02 -07:00
jfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
lockd	Freezer: make kernel threads nonfreezable by default	2007-07-17 10:23:02 -07:00
minix	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
msdos	[PATCH] mark struct inode_operations const 2	2007-02-12 09:48:46 -08:00
ncpfs	Only send SIGXFSZ when exceeding rlimits.	2007-07-16 09:05:43 -07:00
nfs	Freezer: make kernel threads nonfreezable by default	2007-07-17 10:23:02 -07:00
nfs_common
nfsd	Freezer: make kernel threads nonfreezable by default	2007-07-17 10:23:02 -07:00
nls	NLS: Remove obsolete Makefile entries	2007-07-16 09:05:52 -07:00
ntfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
ocfs2	Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2	2007-07-16 10:52:55 -07:00
openpromfs	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
partitions	Fix LDM for new field in the VOL5 VBLK.	2007-07-16 12:01:30 -07:00
proc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched	2007-07-16 11:02:49 -07:00
qnx4	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
ramfs	Add __GFP_MOVABLE for callers to flag allocations from high memory that may be migrated	2007-07-17 10:22:59 -07:00
reiserfs	Only send SIGXFSZ when exceeding rlimits.	2007-07-16 09:05:43 -07:00
romfs	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
smbfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
sysfs	sysfs: add parameter "struct bin_attribute *" in .read/.write methods for sysfs binary attributes	2007-07-11 16:09:09 -07:00
sysv	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
udf	UDF: fix function name from udf_crc16 to udf_crc	2007-07-16 09:05:51 -07:00
ufs	is_power_of_2: ufs/super.c	2007-07-16 09:05:50 -07:00
vfat	[PATCH] mark struct inode_operations const 3	2007-02-12 09:48:46 -08:00
xfs	Freezer: make kernel threads nonfreezable by default	2007-07-17 10:23:02 -07:00
aio.c	signal/timer/event: KAIO eventfd support example	2007-05-11 08:29:37 -07:00
anon_inodes.c	Fix trivial typos in anon_inodes.c comments	2007-07-16 09:05:52 -07:00
attr.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
bad_inode.c	sendfile: remove bad_sendfile() from bad_file_ops	2007-07-10 08:04:15 +02:00
binfmt_aout.c	[PATCH] VFS: change struct file to use struct path	2006-12-08 08:28:41 -08:00
binfmt_elf.c	binfmt_elf warning fix	2007-07-16 09:05:47 -07:00
binfmt_elf_fdpic.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
binfmt_em86.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
binfmt_flat.c	nommu: report correct errno in message	2007-06-08 17:23:32 -07:00
binfmt_misc.c	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
binfmt_script.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
binfmt_som.c
bio.c	unexport bio_{,un}map_user	2007-07-10 08:03:34 +02:00
block_dev.c	bd_claim_by_disk: fix warning	2007-07-16 09:05:50 -07:00
buffer.c	fs: introduce some page/buffer invariants	2007-07-17 10:23:02 -07:00
char_dev.c	[PATCH] remove protection of LANANA-reserved majors	2007-04-04 21:12:47 -07:00
compat.c	optimize compat_core_sys_select() by a using stack space for small fd sets	2007-05-23 20:14:12 -07:00
compat_ioctl.c	compat32: ignore the LOOP_CLR_FD ioctl	2007-07-16 09:05:52 -07:00
dcache.c	mm: clean up and kernelify shrinker registration	2007-07-17 10:23:00 -07:00
dcookies.c
direct-io.c	dio: remove bogus refcounting BUG_ON	2007-07-03 18:23:23 -07:00
dnotify.c	[PATCH] VFS: change struct file to use struct path	2006-12-08 08:28:41 -08:00
dquot.c	mm: clean up and kernelify shrinker registration	2007-07-17 10:23:00 -07:00
drop_caches.c	invalidate_mapping_pages(): add cond_resched	2007-07-16 09:05:36 -07:00
eventfd.c	eventfd use waitqueue lock ...	2007-05-18 13:09:34 -07:00
eventpoll.c	epoll: move kfree inside ep_free	2007-05-15 08:54:00 -07:00
exec.c	uselib: add missing MNT_NOEXEC check	2007-05-23 20:14:13 -07:00
fcntl.c	[PATCH] fdtable: Make fdarray and fdsets equal in size	2006-12-10 09:57:22 -08:00
fifo.c	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
file.c	[PATCH] fdtable: Provide free_fdtable() wrapper	2006-12-22 08:55:50 -08:00
file_table.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
filesystems.c	add filesystem subtype support	2007-05-08 11:15:01 -07:00
fs-writeback.c	Write back inode data pages even when the inode itself is locked	2007-01-26 12:53:20 -08:00
generic_acl.c
inode.c	mm: clean up and kernelify shrinker registration	2007-07-17 10:23:00 -07:00
inotify.c	Introduce a handy list_first_entry macro	2007-05-08 11:15:11 -07:00
inotify_user.c	[PATCH] inotify: read return val fix	2007-02-12 09:48:28 -08:00
internal.h	cleanup compat ioctl handling	2007-05-08 11:15:09 -07:00
ioctl.c	drop obsolete sys_ioctl export	2007-07-16 09:05:48 -07:00
ioprio.c	[PATCH] pid: replace do/while_each_task_pid with do/while_each_pid_task	2007-02-12 09:48:32 -08:00
Kconfig	Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6	2007-07-16 10:32:02 -07:00
Kconfig.binfmt	fs: Kill sh dependency for binfmt_flat.	2007-05-21 14:34:00 +09:00
libfs.c	fs/libfs.c: >80 columns line break fix	2007-05-09 06:44:57 +02:00
locks.c	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
Makefile	signal/timer/event: eventfd core	2007-05-11 08:29:36 -07:00
mbcache.c	mm: clean up and kernelify shrinker registration	2007-07-17 10:23:00 -07:00
mpage.c	consolidate generic_writepages and mpage_writepages	2007-05-11 08:29:35 -07:00
namei.c	[PATCH] complete message queue auditing	2007-05-11 05:38:26 -04:00
namespace.c	fs/namespace.c should #include "internal.h"	2007-07-16 09:05:50 -07:00
nfsctl.c
no-block.c
open.c	O_CLOEXEC for SCM_RIGHTS	2007-07-16 09:05:45 -07:00
pipe.c	pipe: add documentation and comments	2007-07-10 08:04:16 +02:00
pnode.c	Introduce a handy list_first_entry macro	2007-05-08 11:15:11 -07:00
pnode.h	[PATCH] rename struct namespace to struct mnt_namespace	2006-12-08 08:28:51 -08:00
posix_acl.c
quota.c	diskquota: 32bit quota tools on 64bit architectures	2007-07-16 09:05:48 -07:00
quota_v1.c
quota_v2.c
read_write.c	Remove remnants of sendfile()	2007-07-10 08:04:15 +02:00
read_write.h
readdir.c	ROUND_UP macro cleanup in fs/(select|compat|readdir).c	2007-05-08 11:15:09 -07:00
select.c	Style fix in fs/select.c	2007-05-09 07:10:02 +02:00
seq_file.c	seq_file: more atomicity in traverse()	2007-07-16 09:05:45 -07:00
signalfd.c	avoid spurious POLLIN returns in signalfd	2007-06-28 11:34:54 -07:00
splice.c	splice: direct splicing updates ppos twice	2007-07-16 15:02:48 +02:00
stack.c	[PATCH] fs/stack.c: Copy i_nlink after all other attributes are copied	2007-02-19 14:21:50 -08:00
stat.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
super.c	hugetlbfs: handle empty options string	2007-07-16 09:05:46 -07:00
sync.c	Introduce fixed sys_sync_file_range2() syscall, implement on PowerPC and ARM	2007-06-28 11:38:30 -07:00
timerfd.c	timerfd use waitqueue lock ...	2007-05-18 13:09:34 -07:00
utimes.c	utime(s): Honour CAP_FOWNER when times==NULL	2007-07-16 12:14:08 -07:00
xattr.c	[PATCH] audit inode for all xattr syscalls	2007-05-11 05:38:26 -04:00
xattr_acl.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00