RE: [PATCH] bdi: use deferable timer for sync_supers task

[Artem Bityutskiy]

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.

>  Must 
> sb writeout start even there isn't any data? 

No.

-- 
Best Regards,
Artem Bityutskiy (ÐÑÑÑÐ ÐÐÑÑÑÐÐÐ)

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/