On Tue, 20 Sep 2016 12:31:08 -0400, Sowmini Varadhan wrote:
> The vxlan header is after the ethernet header (14 bytes),
> IP header (20 bytes, assuming no options) and udp header (8 bytes).

If the VXLAN header is not aligned to 4 bytes, then IP header is not
aligned to 4 bytes, too, and you have greater problems than just VXLAN.

> Post the skb_reserve adjustments (see computations in in mld_newpack(),
> for example), this triggers an unaligned access on sparc.

IPv6 header is certainly not 20 bytes.

If you see unaligned access, something is wrong. But I very much doubt
that the problem is at the place you're trying to fix. Could you share
the traces with us?


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