On Thu, 19 Apr 2007 05:18:07 +0200 Nick Piggin <[email protected]> wrote: > And yes, by fairly, I mean fairly among all threads as a base resource > class, because that's what Linux has always done Yes, there are potential compatibility problems. Example: a machine with 100 busy httpd processes and suddenly a big gzip starts up from console or cron. Under current kernels, that gzip will take ages and the httpds will take a 1% slowdown, which may well be exactly the behaviour which is desired. If we were to schedule by UID then the gzip suddenly gets 50% of the CPU and those httpd's all take a 50% hit, which could be quite serious. That's simple to fix via nicing, but people have to know to do that, and there will be a transition period where some disruption is possible. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] 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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