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    SubjectRe: [RFC][PATCH] net drivers and cache alignment
    Andrew Morton wrote:
    >
    > "David S. Miller" wrote:
    > >
    > > From: Andrew Morton <akpm@digeo.com>
    > > Date: Sat, 07 Dec 2002 15:29:16 -0800
    > >
    > > Jeff Garzik wrote:
    > > > Attached is cut #2. Thanks for all the near-instant feedback so far :)
    > > > Andrew, does the attached still need padding on SMP?
    > >
    > > It needs padding _only_ on SMP. ____cacheline_aligned_in_smp.
    > >
    > > non-smp machines lack L2 caches? That's new to me :-)
    > >
    > > More seriously, there are real benefits on non-SMP systems.
    >
    > Then I am most confused. None of these fields will be put under
    > busmastering or anything like that, so what advantage is there in
    > spreading them out?

    Oh I see what you want - to be able to pick up all the operating fields
    in a single fetch.

    That will increase the overall cache footprint though. I wonder if
    it's really a net win, over just keeping it small.
    -
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