From ac8e895bd260cb8bb19ade6a3abd44e7abe9a01d Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Mon, 7 Oct 2013 11:29:03 +0100 Subject: sched/numa: Add infrastructure for split shared/private accounting of NUMA hinting faults 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 Reviewed-by: Rik van Riel Cc: Andrea Arcangeli Cc: Johannes Weiner Cc: Srikar Dronamraju Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1381141781-10992-26-git-send-email-mgorman@suse.de Signed-off-by: Ingo Molnar --- mm/huge_memory.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'mm/huge_memory.c') diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 8677dbf31c2e..914216733e0a 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1282,7 +1282,7 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, struct page *page; unsigned long haddr = addr & HPAGE_PMD_MASK; int page_nid = -1, this_nid = numa_node_id(); - int target_nid; + int target_nid, last_nid = -1; bool page_locked; bool migrated = false; @@ -1293,6 +1293,7 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, page = pmd_page(pmd); BUG_ON(is_huge_zero_page(page)); page_nid = page_to_nid(page); + last_nid = page_nid_last(page); count_vm_numa_event(NUMA_HINT_FAULTS); if (page_nid == this_nid) count_vm_numa_event(NUMA_HINT_FAULTS_LOCAL); @@ -1361,7 +1362,7 @@ out: page_unlock_anon_vma_read(anon_vma); if (page_nid != -1) - task_numa_fault(page_nid, HPAGE_PMD_NR, migrated); + task_numa_fault(last_nid, page_nid, HPAGE_PMD_NR, migrated); return 0; } -- cgit v1.2.3