On Mon, 2012-07-09 at 10:53 -0400, Rik van Riel wrote: > On 07/09/2012 08:26 AM, Peter Zijlstra wrote: > > On Sun, 2012-07-08 at 14:34 -0400, Rik van Riel wrote: > > >> Do we really want to calculate the amount of CPU time used > >> by a process, and start migrating after just one second? > >> > >> Or would it be ok to start migrating once a process has > >> been scanned once or twice by the NUMA code? > > > > You mean, the 2-3rd time we try and migrate this task, not the memory > > scanning thing as per Andrea, right? > > Indeed. That way we can simply keep a flag somewhere, > instead of iterating over the threads in a process. Note that the code in -tip needs to iterate over all tasks in order to test all cpus_allowed and mems_allowed masks. But we could keep a process wide intersection of those masks around as well I guess, updating them is a slow path anyway. -- 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/ . Don't email: <a href