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    SubjectRe: [2.7 "thoughts"] V0.3
    On Fri, Oct 10, 2003 at 09:54:12AM +0200, Frederick, Fabian wrote:
    > 2.7 "thoughts"
    > Thanks to Gabor, Stuart, Stephan and others
    > Don't hesitate to send me more or comment.

    Ugh, this is all crackpot wishlist gunk.

    How about some goodies backed with real working code, like:

    * O(1) proc_pid_statm()
    -- originally by bcrl for 2.4, fwd port maintained by wli
    * O(lg(n)) proc_pid_readdir()/proc_task_readdir()
    -- original O(1) proc_pid_readdir() by manfred, rewritten by
    -- wli to use rbtrees for O(lg(n)) seeks into the relevant
    -- lists (walking over empty buckets had overhead)
    * 4KB ia32 kernel stacks + irqstacks
    -- original by bcrl, fwd port maintained by dhansen for a
    -- substantial amount of time, now maintained by wli
    * ia32 leaf pagetable node cache
    -- wli
    * node-local per_cpu areas for ia32 NUMA
    -- wli
    * highpmd, analogue of highpte for pmd's
    -- wli. Gets pmd's on node-local mem on ia32 NUMA, and
    -- alleviates a lot of lowmem pressure under heavy
    -- multiprogramming levels on PAE.

    Some benchmarks of a patchset including these (and several other things)
    are at, and some ports
    of the patch set are at

    Whatever fantasy may be worth, working code is worth a lot more. I'll
    refrain from mentioning prototype-quality patches I'm hacking on atm.

    -- wli
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