diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2008-11-25 12:43:51 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-25 15:45:46 +0100 |
| commit | ca109491f612aab5c8152207631c0444f63da97f (patch) | |
| tree | 46d0a90e79c75fc039bda7d01862062e0ac39900 /include/linux/interrupt.h | |
| parent | ed313489badef16d700f5a3be50e8fd8f8294bc8 (diff) | |
hrtimer: removing all ur callback modes
Impact: cleanup, move all hrtimer processing into hardirq context
This is an attempt at removing some of the hrtimer complexity by
reducing the number of callback modes to 1.
This means that all hrtimer callback functions will be ran from HARD-irq
context.
I went through all the 30 odd hrtimer callback functions in the kernel
and saw only one that I'm not quite sure of, which is the one in
net/can/bcm.c - hence I'm CC-ing the folks responsible for that code.
Furthermore, the hrtimer core now calls callbacks directly with IRQs
disabled in case you try to enqueue an expired timer. If this timer is a
periodic timer (which should use hrtimer_forward() to advance its time)
then it might be possible to end up in an inf. recursive loop due to the
fact that hrtimer_forward() doesn't round up to the next timer
granularity, and therefore keeps on calling the callback - obviously
this needs a fix.
Aside from that, this seems to compile and actually boot on my dual core
test box - although I'm sure there are some bugs in, me not hitting any
makes me certain :-)
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/interrupt.h')
| -rw-r--r-- | include/linux/interrupt.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index f58a0cf8929..d6210a97a8c 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -251,9 +251,6 @@ enum BLOCK_SOFTIRQ, TASKLET_SOFTIRQ, SCHED_SOFTIRQ, -#ifdef CONFIG_HIGH_RES_TIMERS - HRTIMER_SOFTIRQ, -#endif RCU_SOFTIRQ, /* Preferable RCU should always be the last softirq */ NR_SOFTIRQS |