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    SubjectRe: New thread RDSL, post-2.6.20 kernels and amanda (tar) miss-fires
    On Tue, Mar 13, 2007 at 11:31:53PM -0400, Gene Heskett wrote:
    >> Now, can someone suggest a patch I can revert that might fix this? The
    >> total number of patches between 2.6.20 and 2.6.21-rc1 will have me
    >> building kernels to bisect this till the middle of June at this rate.

    On Tue, Mar 13, 2007 at 10:07:21PM -0700, William Lee Irwin III wrote:
    > 4 billion patches could be bisected in 34 boots. Between 2.6.20 and
    > 2.6.21-rc1 there are only:
    > $ git rev-list --no-merges v2.6.20..v2.6.21-rc1 |wc -l
    > 3118
    > patches, requiring 14 boots. In general ceil(log(n)/log(2))+2 boots.
    > Of course, this is a little optimistic because it assumes no additional
    > breakage occurring at the various bisection points. In any event,
    > assuming (pessimistically) 10 minutes per build, this is 280 minutes or
    > 4 hours and 40 minutes of build time. I estimate the process should
    > complete well before Friday of this week, never mind June.

    33 boots for 4 billion, 13 boots for 3118, ceil(log(n)/log(2))+1 boots
    in general, 10 minutes/build gives 130 minutes or 2 hours, 10 minutes
    for 13 boots. I have no plausible explanation for these errors, and
    don't care to be told of any, either.


    -- wli
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