add_timer_on and CONFIG_NO

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* add_timer_on and CONFIG_NO_HZ
@ 2007-05-30 13:28 Joe Korty
  2007-05-30 15:57 ` Thomas Gleixner
  0 siblings, 1 reply; 2+ messages in thread
From: Joe Korty @ 2007-05-30 13:28 UTC (permalink / raw)
  To: Thomas Gleixner; +Cc: linux-kernel

Hi Thomas,
 It seems that when add_timer_on() is used to put a timer
on another cpu's timer queue, that remote cpu should be
made to reprogram its hardware APIC timer, when CONFIG_NO_HZ=y
and the new timer is put at the front of the timer wheel.

Regards,
Joe

^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: add_timer_on and CONFIG_NO_HZ
  2007-05-30 13:28 add_timer_on and CONFIG_NO_HZ Joe Korty
@ 2007-05-30 15:57 ` Thomas Gleixner
  0 siblings, 0 replies; 2+ messages in thread
From: Thomas Gleixner @ 2007-05-30 15:57 UTC (permalink / raw)
  To: Joe Korty; +Cc: linux-kernel, Ingo Molnar

Joe,

On Wed, 2007-05-30 at 09:28 -0400, Joe Korty wrote:
> Hi Thomas,
>  It seems that when add_timer_on() is used to put a timer
> on another cpu's timer queue, that remote cpu should be
> made to reprogram its hardware APIC timer, when CONFIG_NO_HZ=y
> and the new timer is put at the front of the timer wheel.

indeed, that makes sense. I look into this. Thanks for pointing it out.

	tglx



^ permalink raw reply	[flat|nested] 2+ messages in thread

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2007-05-30 13:28 add_timer_on and CONFIG_NO_HZ Joe Korty
2007-05-30 15:57 ` Thomas Gleixner

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