The huge_zonelist() function in the memory policy layer
provides an list of zones ordered by NUMA distance. The hugetlb
layer will walk that list looking for a zone that has available huge pages
but is also in the nodeset of the current cpuset.
This patch does not contain the folding of find_or_alloc_huge_page() that
was controversial in the earlier discussion.
Signed-off-by: Christoph Lameter <[email protected]>
Index: linux-2.6.14-mm2/mm/mempolicy.c
===================================================================
--- linux-2.6.14-mm2.orig/mm/mempolicy.c 2005-11-15 10:29:53.000000000 -0800
+++ linux-2.6.14-mm2/mm/mempolicy.c 2005-11-15 12:30:26.000000000 -0800
@@ -1005,6 +1005,34 @@ static unsigned offset_il_node(struct me
return nid;
}
+/* Caculate a node number for interleave */
+static inline unsigned interleave_nid(struct mempolicy *pol,
+ struct vm_area_struct *vma, unsigned long addr, int shift)
+{
+ if (vma) {
+ unsigned long off;
+
+ off = vma->vm_pgoff;
+ off += (addr - vma->vm_start) >> shift;
+ return offset_il_node(pol, vma, off);
+ } else
+ return interleave_nodes(pol);
+}
+
+/* Return a zonelist suitable for a huge page allocation. */
+struct zonelist *huge_zonelist(struct vm_area_struct *vma, unsigned long addr)
+{
+ struct mempolicy *pol = get_vma_policy(current, vma, addr);
+
+ if (pol->policy == MPOL_INTERLEAVE) {
+ unsigned nid;
+
+ nid = interleave_nid(pol, vma, addr, HPAGE_SHIFT);
+ return NODE_DATA(nid)->node_zonelists + gfp_zone(GFP_HIGHUSER);
+ }
+ return zonelist_policy(GFP_HIGHUSER, pol);
+}
+
/* Allocate a page in interleaved policy.
Own path because it needs to do special accounting. */
static struct page *alloc_page_interleave(gfp_t gfp, unsigned order,
@@ -1053,15 +1081,8 @@ alloc_page_vma(gfp_t gfp, struct vm_area
if (unlikely(pol->policy == MPOL_INTERLEAVE)) {
unsigned nid;
- if (vma) {
- unsigned long off;
- off = vma->vm_pgoff;
- off += (addr - vma->vm_start) >> PAGE_SHIFT;
- nid = offset_il_node(pol, vma, off);
- } else {
- /* fall back to process interleaving */
- nid = interleave_nodes(pol);
- }
+
+ nid = interleave_nid(pol, vma, addr, PAGE_SHIFT);
return alloc_page_interleave(gfp, 0, nid);
}
return __alloc_pages(gfp, 0, zonelist_policy(gfp, pol));
Index: linux-2.6.14-mm2/mm/hugetlb.c
===================================================================
--- linux-2.6.14-mm2.orig/mm/hugetlb.c 2005-11-15 11:36:44.000000000 -0800
+++ linux-2.6.14-mm2/mm/hugetlb.c 2005-11-15 13:12:33.000000000 -0800
@@ -33,11 +33,12 @@ static void enqueue_huge_page(struct pag
free_huge_pages_node[nid]++;
}
-static struct page *dequeue_huge_page(void)
+static struct page *dequeue_huge_page(struct vm_area_struct *vma,
+ unsigned long address)
{
int nid = numa_node_id();
struct page *page = NULL;
- struct zonelist *zonelist = NODE_DATA(nid)->node_zonelists;
+ struct zonelist *zonelist = huge_zonelist(vma, address);
struct zone **z;
for (z = zonelist->zones; *z; z++) {
@@ -83,13 +84,13 @@ void free_huge_page(struct page *page)
spin_unlock(&hugetlb_lock);
}
-struct page *alloc_huge_page(void)
+struct page *alloc_huge_page(struct vm_area_struct *vma, unsigned long addr)
{
struct page *page;
int i;
spin_lock(&hugetlb_lock);
- page = dequeue_huge_page();
+ page = dequeue_huge_page(vma, addr);
if (!page) {
spin_unlock(&hugetlb_lock);
return NULL;
@@ -192,7 +193,7 @@ static unsigned long set_max_huge_pages(
spin_lock(&hugetlb_lock);
try_to_free_low(count);
while (count < nr_huge_pages) {
- struct page *page = dequeue_huge_page();
+ struct page *page = dequeue_huge_page(NULL, 0);
if (!page)
break;
update_and_free_page(page);
@@ -378,8 +379,9 @@ void unmap_hugepage_range(struct vm_area
flush_tlb_range(vma, start, end);
}
-static struct page *find_or_alloc_huge_page(struct address_space *mapping,
- unsigned long idx, int shared)
+static struct page *find_or_alloc_huge_page(struct vm_area_struct *vma,
+ unsigned long addr, struct address_space *mapping,
+ unsigned long idx, int shared)
{
struct page *page;
int err;
@@ -391,7 +393,7 @@ retry:
if (hugetlb_get_quota(mapping))
goto out;
- page = alloc_huge_page();
+ page = alloc_huge_page(vma, addr);
if (!page) {
hugetlb_put_quota(mapping);
goto out;
@@ -431,7 +433,7 @@ static int hugetlb_cow(struct mm_struct
}
page_cache_get(old_page);
- new_page = alloc_huge_page();
+ new_page = alloc_huge_page(vma, address);
if (!new_page) {
page_cache_release(old_page);
@@ -480,7 +482,7 @@ int hugetlb_no_page(struct mm_struct *mm
* Use page lock to guard against racing truncation
* before we get page_table_lock.
*/
- page = find_or_alloc_huge_page(mapping, idx,
+ page = find_or_alloc_huge_page(vma, address, mapping, idx,
vma->vm_flags & VM_SHARED);
if (!page)
goto out;
Index: linux-2.6.14-mm2/include/linux/mempolicy.h
===================================================================
--- linux-2.6.14-mm2.orig/include/linux/mempolicy.h 2005-11-15 10:29:52.000000000 -0800
+++ linux-2.6.14-mm2/include/linux/mempolicy.h 2005-11-15 12:30:26.000000000 -0800
@@ -158,6 +158,8 @@ extern void numa_default_policy(void);
extern void numa_policy_init(void);
extern void numa_policy_rebind(const nodemask_t *old, const nodemask_t *new);
extern struct mempolicy default_policy;
+extern struct zonelist *huge_zonelist(struct vm_area_struct *vma,
+ unsigned long addr);
int do_migrate_pages(struct mm_struct *mm,
const nodemask_t *from_nodes, const nodemask_t *to_nodes, int flags);
Index: linux-2.6.14-mm2/include/linux/hugetlb.h
===================================================================
--- linux-2.6.14-mm2.orig/include/linux/hugetlb.h 2005-11-15 10:29:52.000000000 -0800
+++ linux-2.6.14-mm2/include/linux/hugetlb.h 2005-11-15 12:30:26.000000000 -0800
@@ -22,7 +22,7 @@ int hugetlb_report_meminfo(char *);
int hugetlb_report_node_meminfo(int, char *);
int is_hugepage_mem_enough(size_t);
unsigned long hugetlb_total_pages(void);
-struct page *alloc_huge_page(void);
+struct page *alloc_huge_page(struct vm_area_struct *, unsigned long);
void free_huge_page(struct page *);
int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
unsigned long address, int write_access);
@@ -97,7 +97,7 @@ static inline unsigned long hugetlb_tota
#define is_hugepage_only_range(mm, addr, len) 0
#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \
do { } while (0)
-#define alloc_huge_page() ({ NULL; })
+#define alloc_huge_page(vma, addr) ({ NULL; })
#define free_huge_page(p) ({ (void)(p); BUG(); })
#define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; })
-
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