On Wed, 2015-05-13 at 13:27 -0500, Felipe Balbi wrote:
> Hi Alexander,
>
> your commit 9451980a6646 (net: Use cached copy of pfmemalloc to avoid
> accessing page) regresses most OMAP-based boards with a NULL pointer
> dereference.
>
> Below you can find git bisect log and a serial console capture of the
> problem.
Are you using jumbo frames ?
Please try :
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index d67e612bf0ef..701318378142 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -414,9 +414,14 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len,
len += NET_SKB_PAD;
if ((len > SKB_WITH_OVERHEAD(PAGE_SIZE)) ||
- (gfp_mask & (__GFP_WAIT | GFP_DMA)))
- return __alloc_skb(len, gfp_mask, SKB_ALLOC_RX, NUMA_NO_NODE);
-
+ (gfp_mask & (__GFP_WAIT | GFP_DMA))) {
+ skb = __alloc_skb(len, gfp_mask, SKB_ALLOC_RX, NUMA_NO_NODE);
+ if (skb) {
+ skb_reserve(skb, NET_SKB_PAD);
+ skb->dev = dev;
+ }
+ return skb;
+ }
len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
len = SKB_DATA_ALIGN(len);
--
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