Linux kernel stable tree https://git.rulkc.org/pub/scm/linux/kernel/git/stable/linux.git/atom?h=master 2007-10-11T09:20:03+00:00 2007-10-11T09:20:03+00:00 Thomas Gleixner tglx@linutronix.de 2007-10-11T09:20:03+00:00 urn:sha1:96a388de5dc53a8b234b3fd41f3ae2cedc9ffd42 Move the headers to include/asm-x86 and fixup the header install make rules Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> 2006-01-12T03:04:55+00:00 Andi Kleen ak@suse.de 2006-01-11T21:44:36+00:00 urn:sha1:95833c83f3b812c78e48db4eaa19f6c74958470b This adds a new notifier chain that is called with IDLE_START when a CPU goes idle and IDLE_END when it goes out of idle. The context can be idle thread or interrupt context. Since we cannot rely on MONITOR/MWAIT existing the idle end check currently has to be done in all interrupt handlers. They were originally inspired by the similar s390 implementation. They have a variety of applications: - They will be needed for CONFIG_NO_IDLE_HZ - They can be used for oprofile to fix up the missing time in idle when performance counters don't tick. - They can be used for better C state management in ACPI - They could be used for microstate accounting. This is just infrastructure so far, no users. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>