memory hotplug: alloc page from other node in memory online
To initialize hotadded node, some pages are allocated. At that time, the
node hasn't memory, this makes the allocation always fail. In such case,
let's allocate pages from other nodes.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Yakui Zhao <yakui.zhao@intel.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index a13ea64..d9714bd 100644
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c
@@ -48,8 +48,14 @@
{
/* If the main allocator is up use that, fallback to bootmem. */
if (slab_is_available()) {
- struct page *page = alloc_pages_node(node,
+ struct page *page;
+
+ if (node_state(node, N_HIGH_MEMORY))
+ page = alloc_pages_node(node,
GFP_KERNEL | __GFP_ZERO, get_order(size));
+ else
+ page = alloc_pages(GFP_KERNEL | __GFP_ZERO,
+ get_order(size));
if (page)
return page_address(page);
return NULL;