Messages in this thread | | | Date | Fri, 8 Oct 2010 18:27:09 +0800 | From | Yong Wang <> | Subject | Re: [PATCH] bdi: use deferable timer for sync_supers task |
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On Fri, Oct 08, 2010 at 01:28:07PM +0300, Artem Bityutskiy wrote: > On Fri, 2010-10-08 at 18:27 +0800, Wu, Xia wrote: > > > However, when the next wake-up interrupt happens is not defined. It can > > > happen 1ms after, or 1 minute after, or 1 hour after. What Christoph > > > says is that there should be some guarantee that sb writeout starts, > > > say, within 5 to 10 seconds interval. Deferrable timers do not guarantee > > > this. But take a look at the range hrtimers - they do exactly this. > > > > If the system is in sleep state, is there any data which should be written? > > May be yes, may be no. >
Thanks for the quick response, Artem. May I know what might need to be written out when system is really idle?
-Yong
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