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    SubjectRe: quicklists confuse meminfo

    * Arjan van de Ven <> wrote:

    > > > ouch! Could you try the patch below? How large is the quicklist
    > > > cache with this applied?
    > >
    > > hm, Thomas pointed it out that this wont solve all the problems as
    > > quicklists have a built-in "preserve me" throttle (which is rather
    > > stupid).
    > >
    > > the right solution is to get rid of quicklists altogether (Thomas
    > > expects to have patches for that later today).
    > careful with this; the quicklists aren't JUST for speed they are also
    > there to make sure a page we free that is a pagetable, is not reused
    > until we have finished flushing the tlbs on all the cpus that saw it.
    > This is a really hard correctness requirement, and while I can see
    > that quicklists are probably not the best way to achieve this, we
    > can't just throw away the behavior ;(

    no, that's not true anymore - and the current quicklists code doesnt do
    anything like that AFAICS. It used to be a lot more complex, but now
    it's just a thin wrapper around the page allocator.


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      Last update: 2008-03-09 20:29    [W:0.021 / U:62.332 seconds]
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