linux/drivers/input
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
..
gameport Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
joystick Input: xpad - fix report for dpad and inverted Y and RY axes on xbox 360 2007-07-10 00:35:18 -04:00
keyboard Input: pxa27x_keyboard - fix compile error 2007-07-10 00:38:39 -04:00
misc Input: wistron - add support for querying/changing keymap 2007-07-10 00:35:17 -04:00
mouse sysfs: kill unnecessary attribute->owner 2007-07-11 16:09:06 -07:00
serio Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
tablet Input: wacom - add support for the new Bamboo tablets 2007-07-10 00:35:17 -04:00
touchscreen Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
evbug.c Input: rework handle creation code 2007-04-12 01:29:46 -04:00
evdev.c Input: convert from class devices to standard devices 2007-07-10 00:35:17 -04:00
ff-core.c Input: force feedback - make sure effect is present before playing 2007-05-03 00:51:10 -04:00
ff-memless.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
fixp-arith.h
input-polldev.c Input: move input-polldev to drivers/input 2007-06-13 01:49:58 -04:00
input.c Input: convert from class devices to standard devices 2007-07-10 00:35:17 -04:00
joydev.c Input: convert from class devices to standard devices 2007-07-10 00:35:17 -04:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2007-06-13 14:09:39 -07:00
Makefile Input: move input-polldev to drivers/input 2007-06-13 01:49:58 -04:00
mousedev.c Input: convert from class devices to standard devices 2007-07-10 00:35:17 -04:00
tsdev.c Input: tsdev - fix broken usec-to-millisecs conversion 2007-07-10 00:43:06 -04:00