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SubjectRe: Using O(1) scheduler with 600 processes.
> Heh..Well, I am currently using 2.4.19rc5aa1. We're having some major
> stack problems, so I first when through trying to update the XFS
> codebase in 2.4.19rc5aa1. That didn't prove very fruitful. I couldn't
> even fully reverse the patch for some reason.
> So I decided to try 2.4.20aa1 instead, reversing the xfs patches, and
> then updating with a newer code base, worse problems reversing those xfs
> patches.
> SO I decided to just roll my own with the known features we use in
> production.
> 2.4.20 + xfs + lvm106 + rmap or aavm + O(1) sched + pte-highmem.

If you have enough ptes to want pte-highmem, I doubt you want rmap.
pte-chain space consumption will kill you. The calculations are pretty
easy to work out as to what the right solution is for your setup.

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