r8169: use 50% less ram for RX ring
Using standard skb allocations in r8169 leads to order-3 allocations (if PAGE_SIZE=4096), because NIC needs 16383 bytes, and skb overhead makes this bigger than 16384 -> 32768 bytes per "skb" Using kmalloc() permits to reduce memory requirements of one r8169 nic by 4Mbytes. (256 frames * 16Kbytes). This is fine since a hardware bug requires us to copy incoming frames, so we build real skb when doing this copy. Signed-off-by:Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
7662ff46
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