On Saturday 29 May 2010, Peter Zijlstra wrote: > On Fri, 2010-05-28 at 23:44 +0200, Rafael J. Wysocki wrote: > > Consider updatedb or another file indexing ... thing on a laptop. I certainly > > don't want anything like this to run and drain my battery, even if it has > > already been started when the machine was on AC power. Now, of course, > > I can kill it, but for that I need to notice that it's running and it presumably > > might have done some job already and it would be wasteful to lose it. > > It would be quite nice if that app was not regarded as runnable when the > > system was on battery power. > > How will a ionice on steriods that will defer servicing IO when the IO > system QoS limit doesn't meet the updatedb process's level is too low, > not solve this? > > In that case the updatedb process will simply block on IO, will hence > not be runnable and thus not drain your battery. It will only work for apps that use I/O, but there may be purely CPU-bound ones that need that kind of approach too. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
