Messages in this thread | | | Date | Tue, 23 Sep 2003 16:15:29 -0700 | From | Andrew Morton <> | Subject | Re: NS83820 2.6.0-test5 driver seems unstable on IA64 |
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"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.
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