Messages in this thread | | | From | Milton Miller <> | Date | Thu, 27 May 2010 00:25:29 -0500 | Subject | (No subject header) |
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[Hmm, why did this not appear in patchwork.kernel.org? Now I have to guess a CC list.]
On Wed, 26 May 2010 around 22:43:50 -0400 (EDT), Len Brown wrote: > From: Len Brown <len.brown@intel.com> > > TS_POLLING set tells the scheduler a task will poll > need_resched() to look for work. >
True
> TS_POLLING clear tells resched_task() and wake_up_idle_cpu() > that the remote CPU is sleeping in idle, and thus requires > a reschedule interrupt to wake them to notice work.
No, that only applies to the idle task.
> > Update the description of TS_POLLING to reflect how it works. > "cleared when sleeping in idle, requiring reschedule interrupt"
That would imply its set for every normal task that is not in some kind of sleep state.
> > Signed-off-by: Len Brown <len.brown@intel.com> > Acked-by: Peter Zijlstra <peterz@infradead.org>
> -#define TS_POLLING 0x0004 /* true if in idle loop > - and not sleeping */ > +#define TS_POLLING 0x0004 /* clear when sleeping in idle > + requiring reschedule interrupt */
How about "idle task polling need_resched, skip sending interrupt"?
milton
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