Commit ad2ac7d8 authored by Kenneth W. Chen's avatar Kenneth W. Chen Committed by Christoph Hellwig

[PATCH] ia64: fix NUMA hugetlb support

Here is a patch that adds numa support for hugetlb page on ia64.  It is
taken from x86 numa implementation.  The low level hugetlb page
pre-allocation is done in round robin fashion on each numa node and
allocation for user level code is node local aware.
parent c2eb3611
......@@ -20,13 +20,46 @@
#define TASK_HPAGE_BASE (REGION_HPAGE << REGION_SHIFT)
static long htlbpagemem;
int htlbpage_max;
static long htlbzone_pages;
static long htlbpagemem;
int htlbpage_max;
static long htlbzone_pages;
static LIST_HEAD(htlbpage_freelist);
static struct list_head hugepage_freelists[MAX_NUMNODES];
static spinlock_t htlbpage_lock = SPIN_LOCK_UNLOCKED;
static void enqueue_huge_page(struct page *page)
{
list_add(&page->list,
&hugepage_freelists[page_zone(page)->zone_pgdat->node_id]);
}
static struct page *dequeue_huge_page(void)
{
int nid = numa_node_id();
struct page *page = NULL;
if (list_empty(&hugepage_freelists[nid])) {
for (nid = 0; nid < MAX_NUMNODES; ++nid)
if (!list_empty(&hugepage_freelists[nid]))
break;
}
if (nid >= 0 && nid < MAX_NUMNODES &&
!list_empty(&hugepage_freelists[nid])) {
page = list_entry(hugepage_freelists[nid].next, struct page, list);
list_del(&page->list);
}
return page;
}
static struct page *alloc_fresh_huge_page(void)
{
static int nid = 0;
struct page *page;
page = alloc_pages_node(nid, GFP_HIGHUSER, HUGETLB_PAGE_ORDER);
nid = (nid + 1) % numnodes;
return page;
}
void free_huge_page(struct page *page);
static struct page *alloc_hugetlb_page(void)
......@@ -35,13 +68,11 @@ static struct page *alloc_hugetlb_page(void)
struct page *page;
spin_lock(&htlbpage_lock);
if (list_empty(&htlbpage_freelist)) {
page = dequeue_huge_page();
if (!page) {
spin_unlock(&htlbpage_lock);
return NULL;
}
page = list_entry(htlbpage_freelist.next, struct page, list);
list_del(&page->list);
htlbpagemem--;
spin_unlock(&htlbpage_lock);
set_page_count(page, 1);
......@@ -228,7 +259,7 @@ void free_huge_page(struct page *page)
INIT_LIST_HEAD(&page->list);
spin_lock(&htlbpage_lock);
list_add(&page->list, &htlbpage_freelist);
enqueue_huge_page(page);
htlbpagemem++;
spin_unlock(&htlbpage_lock);
}
......@@ -364,7 +395,7 @@ int try_to_free_low(int count)
map = NULL;
spin_lock(&htlbpage_lock);
list_for_each(p, &htlbpage_freelist) {
list_for_each(p, &hugepage_freelists[0]) {
if (map) {
list_del(&map->list);
update_and_free_page(map);
......@@ -401,11 +432,11 @@ int set_hugetlb_mem_size(int count)
return (int)htlbzone_pages;
if (lcount > 0) { /* Increase the mem size. */
while (lcount--) {
page = alloc_pages(__GFP_HIGHMEM, HUGETLB_PAGE_ORDER);
page = alloc_fresh_huge_page();
if (page == NULL)
break;
spin_lock(&htlbpage_lock);
list_add(&page->list, &htlbpage_freelist);
enqueue_huge_page(page);
htlbpagemem++;
htlbzone_pages++;
spin_unlock(&htlbpage_lock);
......@@ -442,17 +473,18 @@ __setup("hugepages=", hugetlb_setup);
static int __init hugetlb_init(void)
{
int i, j;
int i;
struct page *page;
for (i = 0; i < MAX_NUMNODES; ++i)
INIT_LIST_HEAD(&hugepage_freelists[i]);
for (i = 0; i < htlbpage_max; ++i) {
page = alloc_pages(__GFP_HIGHMEM, HUGETLB_PAGE_ORDER);
page = alloc_fresh_huge_page();
if (!page)
break;
for (j = 0; j < HPAGE_SIZE/PAGE_SIZE; ++j)
SetPageReserved(&page[j]);
spin_lock(&htlbpage_lock);
list_add(&page->list, &htlbpage_freelist);
enqueue_huge_page(page);
spin_unlock(&htlbpage_lock);
}
htlbpage_max = htlbpagemem = htlbzone_pages = i;
......
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