kernel/linux.git/include/linux/hrtimer.h, branch linux-2.6.16.y

[PATCH] fix next_timer_interrupt() for hrtimer

2006-03-07T02:40:44+00:00

Also from Thomas Gleixner Function next_timer_interrupt() got broken with a recent patch 6ba1b91213e81aa92b5cf7539f7d2a94ff54947c as sys_nanosleep() was moved to hrtimer. This broke things as next_timer_interrupt() did not check hrtimer tree for next event. Function next_timer_interrupt() is needed with dyntick (CONFIG_NO_IDLE_HZ, VST) implementations, as the system can be in idle when next hrtimer event was supposed to happen. At least ARM and S390 currently use next_timer_interrupt(). Signed-off-by: Thomas Gleixner Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: Russell King Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] hrtimers: cleanups and simplifications

2006-02-01T16:53:13+00:00

Clean up the interface to hrtimers by changing the init code to pass the mode as well as the clock. This allow the init code to select the correct base and eliminates extra timer re-init code in posix-timers. We also simplify the restart interface nanosleep use. Signed-off-by: George Anzinger Signed-off-by: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] hrtimers: fix posix-timer requeue race

2006-02-01T16:53:13+00:00

From: Steven Rostedtrostedt@goodmis.org CPU0 expires a posix-timer and runs the callback function. The signal is queued. After releasing the posix-timer lock and before returning to hrtimer_run_queue CPU0 gets interrupted. CPU1 delivers the queued signal and rearms the timer. CPU0 comes back to hrtimer_run_queue and sets the timer state to expired. The next modification of the timer can result in an oops, because the state information is wrong. Keep track of state = RUNNING and check if the state has been in the return path of hrtimer_run_queue. In case the state has been changed, ignore a restart request and do not touch the state variable. Signed-off-by: Steven Rostedt Signed-off-by: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[hrtimer] Enforce resolution as lower limit of intervals

2006-01-12T10:47:34+00:00

Roman Zippel pointed out that the missing lower limit of intervals leads to an accounting error in the overrun count. Enforce the lower limit of intervals to resolution in the timer forwarding code. Signed-off-by: Thomas Gleixner

[hrtimer] Change resolution storage to ktime_t format

2006-01-12T10:36:14+00:00

Change the storage format of the per base resolution to ktime_t to make it easier accessible in the hrtimers code. Change the resolution from (NSEC_PER_SEC/HZ) to TICK_NSEC as Roman pointed out. TICK_NSEC is closer to the real resolution. Signed-off-by: Thomas Gleixner

[hrtimer] Remove listhead from hrtimer struct

2006-01-12T10:25:54+00:00

The list_head in the hrtimer structure was introduced for easy access to the first timer with the further extensions of real high resolution timers in mind, but it turned out in the course of development that it is not necessary for the standard use case. Remove the list head and access the first expiry timer by a datafield in the timer base. Signed-off-by: Thomas Gleixner

[PATCH] hrtimer: convert posix timers completely

2006-01-10T16:01:39+00:00

- convert posix-timers.c to use hrtimers - remove the now obsolete abslist code Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] hrtimer: create hrtimer nanosleep API

2006-01-10T16:01:38+00:00

introduce the hrtimer_nanosleep() and hrtimer_nanosleep_real() APIs. Not yet used by any code. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] hrtimer: hrtimer core code

2006-01-10T16:01:37+00:00

hrtimer subsystem core. It is initialized at bootup and expired by the timer interrupt, but is otherwise not utilized by any other subsystem yet. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds