Re: [openib-general] Re: [PATCH 6/6] IB: userspace support for RDMA connection manager
From: Roland Dreier
Date: Mon Mar 06 2006 - 17:30:01 EST
David> Please make sure you check "x86_64 vs. x86", and then
David> something like "powerpc64 vs. powerpc32" or "sparc64
David> vs. sparc32", as those are the two different classes of ABI
David> layouts.
Yes, I tried ppc64 vs ppc and it still comes out the same.
Unfortunately I don't have any sparc handy to try.
The fundamental question seems to be whether things like
struct foo {
struct sockaddr_in6 src;
struct sockaddr_in6 dst;
};
and
struct bar {
struct sockaddr_in6 a;
__u32 b;
};
end up being packed, even though struct sockaddr_in6 is 28 bytes in
size. And as far as I can tell, they always do, I guess because the
individual fields of struct sockaddr_in6 are all <= 32 bits.
- R.
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