Venki Pallipadi 6e453a6751 Add support for deferrable timers ... Introduce a new flag for timers - deferrable: Timers that work normally when system is busy. But, will not cause CPU to come out of idle (just to service this timer), when CPU is idle. Instead, this timer will be serviced when CPU eventually wakes up with a subsequent non-deferrable timer. The main advantage of this is to avoid unnecessary timer interrupts when CPU is idle. If the routine currently called by a timer can wait until next event without any issues, this new timer can be used to setup timer event for that routine. This, with dynticks, allows CPUs to be lazy, allowing them to stay in idle for extended period of time by reducing unnecesary wakeup and thereby reducing the power consumption. This patch: Builds this new timer on top of existing timer infrastructure. It uses last bit in 'base' pointer of timer_list structure to store this deferrable timer flag. __next_timer_interrupt() function skips over these deferrable timers when CPU looks for next timer event for which it has to wake up. This is exported by a new interface init_timer_deferrable() that can be called in place of regular init_timer(). [akpm@linux-foundation.org: Privatise a #define] Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-05-08 11:15:05 -07:00
..
irq	kernel/irq/proc.c: unprotected iteration over the IRQ action list in name_unique()	2007-05-08 11:15:05 -07:00
power	freezer: task->exit_state should be treated as bolean	2007-05-08 11:14:58 -07:00
time	[PATCH] fix jiffies clocksource inittime	2007-04-04 21:12:47 -07:00
.gitignore	gitignore: ignore more generated files	2006-01-03 11:35:26 +01:00
acct.c	[PATCH] kernel: change uses of f_{dentry, vfsmnt} to use f_path	2006-12-08 08:28:42 -08:00
audit.c	[NETLINK]: Switch cb_lock spinlock to mutex and allow to override it	2007-04-25 22:29:03 -07:00
audit.h	[PATCH] audit: AUDIT_PERM support	2006-09-11 13:32:30 -04:00
auditfilter.c	[PATCH] minor update to rule add/delete messages (ver 2)	2007-02-17 21:30:09 -05:00
auditsc.c	[PATCH] fix deadlock in audit_log_task_context()	2007-03-14 15:27:48 -07:00
capability.c	[PATCH] pid: replace do/while_each_task_pid with do/while_each_pid_task	2007-02-12 09:48:32 -08:00
compat.c	[PATCH] Common compat_sys_sysinfo	2007-02-11 10:51:32 -08:00
configs.c	[PATCH] struct seq_operations and struct file_operations constification	2006-12-07 08:39:46 -08:00
cpu.c	[PATCH] Fix microcode-related suspend problem	2007-04-02 10:06:09 -07:00
cpuset.c	Fix race between attach_task and cpuset_exit	2007-05-08 11:15:05 -07:00
delayacct.c	KMEM_CACHE(): simplify slab cache creation	2007-05-07 12:12:55 -07:00
die_notifier.c	move die notifier handling to common code	2007-05-08 11:15:04 -07:00
dma.c	[PATCH] struct seq_operations and struct file_operations constification	2006-12-07 08:39:46 -08:00
exec_domain.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
exit.c	Return EPERM not ECHILD on security_task_wait failure	2007-05-07 12:12:57 -07:00
extable.c	[PATCH] symbol_put_addr() locks kernel	2006-05-15 11:20:55 -07:00
fork.c	Merge sys_clone()/sys_unshare() nsproxy and namespace handling	2007-05-08 11:15:00 -07:00
futex_compat.c	[PATCH] __user annotations: futex	2006-10-10 15:37:22 -07:00
futex.c	futex: restartable futex_wait	2007-05-08 11:15:03 -07:00
hrtimer.c	[NET]: Fix networking compilation errors	2007-04-27 15:31:24 -07:00
itimer.c	[PATCH] hrtimers: prevent possible itimer DoS	2007-02-16 08:13:59 -08:00
kallsyms.c	Extend print_symbol capability	2007-04-30 16:40:39 -07:00
Kconfig.hz	[PATCH] HZ: 300Hz support	2006-12-07 08:39:36 -08:00
Kconfig.preempt
kexec.c	Merge branch 'release' of master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6	2006-12-07 15:39:22 -08:00
kfifo.c	[PATCH] Numerous fixes to kernel-doc info in source files.	2007-02-11 10:51:32 -08:00
kmod.c	Revert "Driver core: let request_module() send a /sys/modules/kmod/-uevent"	2007-02-23 14:54:57 -08:00
kprobes.c	move die notifier handling to common code	2007-05-08 11:15:04 -07:00
ksysfs.c	remove "struct subsystem" as it is no longer needed	2007-05-02 18:57:59 -07:00
kthread.c	[PATCH] Numerous fixes to kernel-doc info in source files.	2007-02-11 10:51:32 -08:00
latency.c	[PATCH] severing module.h->sched.h	2006-12-04 02:00:22 -05:00
lockdep_internals.h	[PATCH] lockdep: more chains	2006-12-07 08:39:43 -08:00
lockdep_proc.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
lockdep.c	simplify the stacktrace code	2007-05-08 11:14:58 -07:00
Makefile	move die notifier handling to common code	2007-05-08 11:15:04 -07:00
module.c	module: use krealloc	2007-05-08 11:15:00 -07:00
mutex-debug.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
mutex-debug.h	[PATCH] lockdep: better lock debugging	2006-07-03 15:27:01 -07:00
mutex.c	[PATCH] lockdep: avoid lockdep warning in md	2006-12-08 08:28:39 -08:00
mutex.h	[PATCH] lockdep: prove mutex locking correctness	2006-07-03 15:27:04 -07:00
nsproxy.c	Merge sys_clone()/sys_unshare() nsproxy and namespace handling	2007-05-08 11:15:00 -07:00
panic.c	[PATCH] Add TAINT_USER and ability to set taint flags from userspace	2007-02-11 10:51:29 -08:00
params.c	remove "struct subsystem" as it is no longer needed	2007-05-02 18:57:59 -07:00
pid.c	Merge sys_clone()/sys_unshare() nsproxy and namespace handling	2007-05-08 11:15:00 -07:00
posix-cpu-timers.c	[PATCH] posix timers: RCU optimization for clock_gettime()	2007-02-16 08:14:00 -08:00
posix-timers.c	[PATCH] hrtimers: add high resolution timer support	2007-02-16 08:13:59 -08:00
printk.c	Fixes and cleanups for earlyprintk aka boot console	2007-05-08 11:15:04 -07:00
profile.c	[PATCH] proc: remove useless (and buggy) ->nlink settings	2007-02-11 10:51:32 -08:00
ptrace.c	[PATCH] pidspace: is_init()	2006-09-29 09:18:12 -07:00
rcupdate.c	[PATCH] rcu: add a prefetch() in rcu_do_batch()	2006-12-07 08:39:40 -08:00
rcutorture.c	rcutorture: Mark rcu_torture_init as __init	2007-05-08 11:15:00 -07:00
relay.c	[PATCH] kernel-doc fixes for 2.6.20-git15 (non-drivers)	2007-03-01 14:53:37 -08:00
resource.c	libata/IDE: remove combined mode quirk	2007-04-28 14:15:59 -04:00
rtmutex_common.h	[PATCH] pi-futex: futex_lock_pi/futex_unlock_pi support	2006-06-27 17:32:47 -07:00
rtmutex-debug.c	Remove all inclusions of <linux/config.h>	2006-10-04 03:38:54 -04:00
rtmutex-debug.h	[PATCH] lockdep: better lock debugging	2006-07-03 15:27:01 -07:00
rtmutex-tester.c	[PATCH] Add include/linux/freezer.h and move definitions from sched.h	2006-12-07 08:39:27 -08:00
rtmutex.c	[PATCH] hrtimers: namespace and enum cleanup	2007-02-16 08:13:58 -08:00
rtmutex.h	[PATCH] lockdep: better lock debugging	2006-07-03 15:27:01 -07:00
rwsem.c	[PATCH] lockdep: prove rwsem locking correctness	2006-07-03 15:27:04 -07:00
sched.c	Safer nr_node_ids and nr_node_ids determination and initial values	2007-05-07 12:12:51 -07:00
seccomp.c
signal.c	KMEM_CACHE(): simplify slab cache creation	2007-05-07 12:12:55 -07:00
softirq.c	[PATCH] tick-management: dyntick / highres functionality	2007-02-16 08:13:59 -08:00
softlockup.c	softlockup: s/99/MAX_RT_PRIO/	2007-05-08 11:14:59 -07:00
spinlock.c	[PATCH] lockdep: spin_lock_irqsave_nested()	2006-11-25 13:28:34 -08:00
srcu.c	[PATCH] SRCU: report out-of-memory errors	2006-10-04 07:55:30 -07:00
stacktrace.c	[PATCH] lockdep: stacktrace subsystem, core	2006-07-03 15:27:02 -07:00
stop_machine.c	Use stop_machine_run in the Intel RNG driver	2007-05-08 11:15:00 -07:00
sys_ni.c	[PATCH] Create compat_sys_migrate_pages	2006-11-03 12:27:59 -08:00
sys.c	remove software_suspend()	2007-05-07 12:12:59 -07:00
sysctl.c	proc: maps protection	2007-05-08 11:15:02 -07:00
taskstats.c	KMEM_CACHE(): simplify slab cache creation	2007-05-07 12:12:55 -07:00
time.c	Optimize timespec_trunc()	2007-05-08 11:15:01 -07:00
timer.c	Add support for deferrable timers	2007-05-08 11:15:05 -07:00
tsacct.c	[PATCH] time: x86_64: split x86_64/kernel/time.c up	2007-02-16 08:14:00 -08:00
uid16.c	[PATCH] Add more prevent_tail_call()	2006-04-19 16:27:18 -07:00
user.c	[PATCH] slab: remove kmem_cache_t	2006-12-07 08:39:25 -08:00
utsname_sysctl.c	[PATCH] sysctl: remove insert_at_head from register_sysctl	2007-02-14 08:09:59 -08:00
utsname.c	Merge sys_clone()/sys_unshare() nsproxy and namespace handling	2007-05-08 11:15:00 -07:00
wait.c	[PATCH] uninline init_waitqueue_head()	2006-07-10 13:24:25 -07:00
workqueue.c	[PATCH] Add debugging feature /proc/timer_stat	2007-02-16 08:13:59 -08:00