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hrtimers: Avoid touching inactive timer bases

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Instead of iterating over all possible timer bases avoid it by marking
the active bases in the cpu base.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Peter Zijlstra <peterz@infradead.org>
This commit is contained in:
Thomas Gleixner 2011-05-20 13:05:15 +02:00
parent f24444b01b
commit ab8177bc53
6 changed files with 29 additions and 19 deletions
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7
include/linux/hrtimer.h
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@ -143,7 +143,8 @@ struct hrtimer_sleeper {
*/
struct hrtimer_clock_base {
struct hrtimer_cpu_base *cpu_base;
clockid_t index;
int index;
clockid_t clockid;
struct timerqueue_head active;
ktime_t resolution;
ktime_t (*get_time)(void);
@ -162,7 +163,7 @@ enum hrtimer_base_type {
* struct hrtimer_cpu_base - the per cpu clock bases
* @lock: lock protecting the base and associated clock bases
* and timers
* @clock_base: array of clock bases for this cpu
* @active_bases: Bitfield to mark bases with active timers
* @expires_next: absolute time of the next event which was scheduled
* via clock_set_next_event()
* @hres_active: State of high resolution mode
@ -171,9 +172,11 @@ enum hrtimer_base_type {
* @nr_retries: Total number of hrtimer interrupt retries
* @nr_hangs: Total number of hrtimer interrupt hangs
* @max_hang_time: Maximum time spent in hrtimer_interrupt
* @clock_base: array of clock bases for this cpu
*/
struct hrtimer_cpu_base {
raw_spinlock_t lock;
unsigned long active_bases;
#ifdef CONFIG_HIGH_RES_TIMERS
ktime_t expires_next;
int hres_active;