On Thu, 2012-02-02 at 10:41 -0500, Chris Metcalf wrote: > At Tilera we have been supporting a "dataplane" mode (aka Zero Overhead > Linux - the marketing name). This is configured on a per-cpu basis, and in > addition to setting isolcpus for those nodes, also suppresses various > things that might otherwise run (soft lockup detection, vmstat work, > etc.). See that's wrong.. it starts being wrong by depending on cpuisol and goes from there. > The claim is that you need to specify these kinds of things > per-core since it's not always possible for the kernel to know that you > really don't want the scheduler or any other interrupt source to touch the > core, as opposed to the case where you just happen to have a single process > scheduled on the core and you don't mind occasional interrupts. Right, so that claim is proven false I think. > But > there's definitely appeal in having the kernel do it adaptively too, > particularly if it can be made to work just as well as configuring it > statically. I see no reason why it shouldn't work as well or even better. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>