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    SubjectRe: Possible bug from kernel 2.6.22 and above, 2.6.24-rc4

    * Jie Chen <chen@jlab.org> wrote:

    > Hi, Ingo:
    >
    > I guess it is a good news. I did patch 2.6.21.7 kernel using your cfs
    > patch. The results of pthread_sync is the same as the non-patched
    > 2.6.21 kernel. This means the performance of is not related to the
    > scheduler. As for overhead of the gettimeofday, there is no difference
    > between 2.6.21 and 2.6.24-rc4. The reference time is around 10.5 us
    > for both kernel.

    could you please paste again the relevant portion of the output you get
    on a "good" .21 kernel versus the output you get on a "bad" .24 kernel?

    > So what is changed between 2.6.21 and 2.6.22? Any hints :-). Thank you
    > very much for all your help.

    we'll figure it out i'm sure :)

    Ingo


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