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    SubjectRe: Patch 2.5.25: Ensure xtime_lock and timerlist_lock are on difft cachelines
    Date
    In message <20020726125605.A2822@phreaker.net> you write:
    > This patch was not meant to be a definitive fix for do_gettimeofday.
    > I thought having diffrent locks on the same cacheline was bad. Atleast,
    > I don't think there'd be any negative performance impact due to my patch.
    > Pls correct me if I am wrong.

    Did you ever wonder why we don't declare spinlock to be ____cacheline_aligned?
    While it's probably justified in this case, you pay for it in a slight
    increase in size...

    > I want to get some nos too .. and probably will...(still waiting for my
    > turn to use the 4way here :-) ). But, I decided to post this patch
    > as a follow up to the 2.5 profiler discussion on lse-tech.
    > Anywayz, point taken. Next time I submit an optimization patch to you,
    > I'll post the measuements too.

    Sure!

    Thanks,
    Rusty.
    --
    Anyone who quotes me in their sig is an idiot. -- Rusty Russell.
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