On Mon, 2012-07-09 at 10:53 -0400, Rik van Riel wrote:

On 07/09/2012 08:26 AM, Peter Zijlstra wrote:

quoted

On Sun, 2012-07-08 at 14:34 -0400, Rik van Riel wrote:

quoted

quoted

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@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>