Re: [PATCH 1/6] numa,sched,mm: remove p->numa_migrate_deferred

2014-01-21 Thread Mel Gorman
On Mon, Jan 20, 2014 at 02:21:02PM -0500, r...@redhat.com wrote: > From: Rik van Riel > > Excessive migration of pages can hurt the performance of workloads > that span multiple NUMA nodes. However, it turns out that the > p->numa_migrate_deferred knob is a really big hammer, which does > reduce

[PATCH 1/6] numa,sched,mm: remove p->numa_migrate_deferred

2014-01-20 Thread riel
From: Rik van Riel Excessive migration of pages can hurt the performance of workloads that span multiple NUMA nodes. However, it turns out that the p->numa_migrate_deferred knob is a really big hammer, which does reduce migration rates, but does not actually help performance. Now that the secon

[PATCH 1/6] numa,sched,mm: remove p->numa_migrate_deferred

2014-01-16 Thread riel
From: Rik van Riel Excessive migration of pages can hurt the performance of workloads that span multiple NUMA nodes. However, it turns out that the p->numa_migrate_deferred knob is a really big hammer, which does reduce migration rates, but does not actually help performance. Now that the secon