On Fri, 2014-04-11 at 13:00 -0400, [email protected] wrote:
> This should reduce the overhead of the automatic NUMA placement
> code, when a workload spans multiple NUMA nodes.
trivial style note:
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
[]
> @@ -1737,6 +1737,7 @@ void task_numa_fault(int last_cpupid, int mem_node, int
> pages, int flags)
> struct task_struct *p = current;
> bool migrated = flags & TNF_MIGRATED;
> int cpu_node = task_node(current);
> + int local = !!(flags & TNF_FAULT_LOCAL);
Perhaps local would look nicer as bool
and be better placed next to migrated.
bool migrated = flags & TNF_MIGRATED;
bool local = flags & TNF_FAULT_LOCAL;
int cpu_node = task_node(current);
> @@ -1785,6 +1786,17 @@ void task_numa_fault(int last_cpupid, int mem_node,
> int pages, int flags)
> + if (!priv && !local && p->numa_group &&
> + node_isset(cpu_node, p->numa_group->active_nodes) &&
> + node_isset(mem_node, p->numa_group->active_nodes))
> + local = 1;
local = true;
--
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