Giuseppe CAVALLARO 45db81e159 stmmac: limit max_mtu in case of 4KiB and use __netdev_alloc_skb (V2) ... Problem using big mtu around 4096 bytes is you end allocating (4096 +NET_SKB_PAD + NET_IP_ALIGN + sizeof(struct skb_shared_info) bytes -> 8192 bytes : order-1 pages It's better to limit the mtu to SKB_MAX_HEAD(NET_SKB_PAD), to have no more than one page per skb. Also the patch changes the netdev_alloc_skb_ip_align() done in init_dma_desc_rings() and uses a variant allowing GFP_KERNEL allocations allowing the driver to load even in case of memory pressure. Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2011-10-19 19:24:18 -04:00
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stmmac	stmmac: limit max_mtu in case of 4KiB and use __netdev_alloc_skb (V2)	2011-10-19 19:24:18 -04:00
Kconfig	drivers/net/ethernet/*: Enabled vendor Kconfig options	2011-08-27 00:58:56 -07:00
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