[PATCH] node-aware skb allocation
Node-aware allocation of skbs for the receive path.
Details:
- __alloc_skb gets a new node argument and cals the node-aware
slab functions with it.
- netdev_alloc_skb passed the node number it gets from dev_to_node
to it, everyone else passes -1 (any node)
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 8e1c385..7217fb8 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -132,6 +132,7 @@
* @gfp_mask: allocation mask
* @fclone: allocate from fclone cache instead of head cache
* and allocate a cloned (child) skb
+ * @node: numa node to allocate memory on
*
* Allocate a new &sk_buff. The returned buffer has no headroom and a
* tail room of size bytes. The object has a reference count of one.
@@ -141,7 +142,7 @@
* %GFP_ATOMIC.
*/
struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
- int fclone)
+ int fclone, int node)
{
kmem_cache_t *cache;
struct skb_shared_info *shinfo;
@@ -151,14 +152,14 @@
cache = fclone ? skbuff_fclone_cache : skbuff_head_cache;
/* Get the HEAD */
- skb = kmem_cache_alloc(cache, gfp_mask & ~__GFP_DMA);
+ skb = kmem_cache_alloc_node(cache, gfp_mask & ~__GFP_DMA, node);
if (!skb)
goto out;
/* Get the DATA. Size must match skb_add_mtu(). */
size = SKB_DATA_ALIGN(size);
- data = kmalloc_track_caller(size + sizeof(struct skb_shared_info),
- gfp_mask);
+ data = kmalloc_node_track_caller(size + sizeof(struct skb_shared_info),
+ gfp_mask, node);
if (!data)
goto nodata;
@@ -267,9 +268,10 @@
struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
unsigned int length, gfp_t gfp_mask)
{
+ int node = dev->class_dev.dev ? dev_to_node(dev->class_dev.dev) : -1;
struct sk_buff *skb;
- skb = alloc_skb(length + NET_SKB_PAD, gfp_mask);
+ skb = __alloc_skb(length + NET_SKB_PAD, gfp_mask, 0, node);
if (likely(skb)) {
skb_reserve(skb, NET_SKB_PAD);
skb->dev = dev;
