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sched/numa: Add infrastructure for split shared/private accounting of NUMA hinting faults

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Ideally it would be possible to distinguish between NUMA hinting faults
that are private to a task and those that are shared.  This patch prepares
infrastructure for separately accounting shared and private faults by
allocating the necessary buffers and passing in relevant information. For
now, all faults are treated as private and detection will be introduced
later.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1381141781-10992-26-git-send-email-mgorman@suse.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Mel Gorman 2013-10-07 11:29:03 +01:00 • committed by Ingo Molnar
commit ac8e895bd2
4 changed files with 47 additions and 17 deletions
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5
include/linux/sched.h
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@ -1445,10 +1445,11 @@ struct task_struct {
#define tsk_cpus_allowed(tsk) (&(tsk)->cpus_allowed)
#ifdef CONFIG_NUMA_BALANCING
extern void task_numa_fault(int node, int pages, bool migrated);
extern void task_numa_fault(int last_node, int node, int pages, bool migrated);
extern void set_numabalancing_state(bool enabled);
#else
static inline void task_numa_fault(int node, int pages, bool migrated)
static inline void task_numa_fault(int last_node, int node, int pages,
bool migrated)
{
}
static inline void set_numabalancing_state(bool enabled)