On Mon, Jan 20, 2014 at 02:21:07PM -0500, riel@xxxxxxxxxx wrote: > From: Rik van Riel <riel@xxxxxxxxxx> > > The current code in task_numa_placement calculates the difference > between the old and the new value, but also temporarily stores half > of the old value in the per-process variables. > > The NUMA balancing code looks at those per-process variables, and > having other tasks temporarily see halved statistics could lead to > unwanted numa migrations. This can be avoided by doing all the math > in local variables. > > This change also simplifies the code a little. > > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > Cc: Mel Gorman <mgorman@xxxxxxx> > Cc: Ingo Molnar <mingo@xxxxxxxxxx> > Cc: Chegu Vinod <chegu_vinod@xxxxxx> > Signed-off-by: Rik van Riel <riel@xxxxxxxxxx> Acked-by: Mel Gorman <mgorman@xxxxxxx> -- Mel Gorman SUSE Labs -- 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=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>