"David S. Miller" <davem@redhat.com> wrote: > > > That's not true; they could be avoided by using get_unaligned() and > > put_unaligned(). You just don't want to because they'd make sparc suck. > > Not only sparc would be effected by this. Using {get,put}_unaligned() > all over the networking would incur a penalty for many platforms, not > just sparc. Really? I'd have thought that get/put_unaligned would be a simple load/store for architectures which wish to implement it in that manner. Other architectures could take it as an optimisation hint, to avoid taking a trap. They'd probably still need to implement the fixup, but if a few of these hints could reduce the trap frequency significantly then it may be worth doing? I guess it depends on how many of these hints would be needed at the source level to avoid "most" of the traps. - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.htmlReceived on Tue Sep 23 19:15:34 2003
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