From: "Michael S. Tsirkin" <[email protected]>
Date: Wed, 11 Oct 2006 11:05:04 +0200
> So, it seems that if I set NETIF_F_SG but clear NETIF_F_ALL_CSUM,
> data will be copied over rather than sent directly.
> So why does dev.c have to force set NETIF_F_SG to off then?
Because it's more efficient to copy into a linear destination
buffer of an SKB than page sub-chunks when doing checksum+copy.
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