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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>		18 years ago
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basic-pm-debugging.txt	Documentation: Ask driver writers to provide PM support	18 years ago
devices.txt	…
drivers-testing.txt	Documentation: Ask driver writers to provide PM support	18 years ago
freezing-of-tasks.txt	Freezer: make kernel threads nonfreezable by default	18 years ago
interface.txt	power management: change /sys/power/disk display	18 years ago
pci.txt	PCI: remove useless pci driver method	18 years ago
s2ram.txt	[PATCH] s2ram debugging documentation	18 years ago
states.txt	power management: remove firmware disk mode	18 years ago
swsusp-and-swap-files.txt	…
swsusp-dmcrypt.txt	…
swsusp.txt	Freezer: make kernel threads nonfreezable by default	18 years ago
tricks.txt	…
userland-swsusp.txt	PM: Separate hibernation code from suspend code	18 years ago
video.txt	…
video_extension.txt	…