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On Apr 21 2007 18:00, Ingo Molnar wrote: >* Con Kolivas <kernel@kolivas.org> wrote: > >> > Feels even better, mouse movements are very smooth even under high >> > load. I noticed that X gets reniced to -19 with this scheduler. >> > I've not looked at the code yet but this looked suspicious to me. >> > I've reniced it to 0 and it did not change any behaviour. Still >> > very good. >> >> Looks like this code does it: >> >> +int sysctl_sched_privileged_nice_level __read_mostly = -19; > >correct. Note that Willy reniced X back to 0 so it had no relevance on >his test. Also note that i pointed this change out in the -v4 CFS >announcement: > >|| Changes since -v3: >|| >|| - usability fix: automatic renicing of kernel threads such as >|| keventd, OOM tasks and tasks doing privileged hardware access >|| (such as Xorg). > >i've attached it below in a standalone form, feel free to put it into >SD! :) Assume X went crazy (lacking any statistics, I make the unproven statement that this happens more often than kthreads going berserk), then having it niced with minus something is not too nice. Jan -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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