[PATCH, RFC 1/6] THP: Use real address for NUMA policy

From: Kirill A. Shutemov
Date: Fri Jul 20 2012 - 08:48:46 EST


From: Andi Kleen <ak@xxxxxxxxxxxxxxx>

Use the fault address, not the rounded down hpage address for NUMA
policy purposes. In some circumstances this can give more exact
NUMA policy.

Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 57c4b93..70737ec 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -681,11 +681,11 @@ static inline gfp_t alloc_hugepage_gfpmask(int defrag, gfp_t extra_gfp)

static inline struct page *alloc_hugepage_vma(int defrag,
struct vm_area_struct *vma,
- unsigned long haddr, int nd,
+ unsigned long address, int nd,
gfp_t extra_gfp)
{
return alloc_pages_vma(alloc_hugepage_gfpmask(defrag, extra_gfp),
- HPAGE_PMD_ORDER, vma, haddr, nd);
+ HPAGE_PMD_ORDER, vma, address, nd);
}

#ifndef CONFIG_NUMA
@@ -710,7 +710,7 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
if (unlikely(khugepaged_enter(vma)))
return VM_FAULT_OOM;
page = alloc_hugepage_vma(transparent_hugepage_defrag(vma),
- vma, haddr, numa_node_id(), 0);
+ vma, address, numa_node_id(), 0);
if (unlikely(!page)) {
count_vm_event(THP_FAULT_FALLBACK);
goto out;
@@ -944,7 +944,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
if (transparent_hugepage_enabled(vma) &&
!transparent_hugepage_debug_cow())
new_page = alloc_hugepage_vma(transparent_hugepage_defrag(vma),
- vma, haddr, numa_node_id(), 0);
+ vma, address, numa_node_id(), 0);
else
new_page = NULL;

--
1.7.7.6

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/