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Joakim Tjernlund wrote: > I am thinking of implementing harware scatter/gatter support( NETIF_F_SG) in my > ethernet driver. The network device cannot do HW checksuming. > > Will the IP stack make use of the SG support and will there be any significant performance > improvement? No; you need HW checksumming for NETIF_F_SG to be useful. If HW checksumming is not available, scatter-gather is useless, because the net stack must always make a pass over the data to checksum it. Since it must do that, it can linearize the skb at the same time, eliminating the need for SG. Jeff - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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