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    SubjectRe: anon_vma RFC2
    On Fri, Mar 12, 2004 at 02:24:36PM +0100, Andrea Arcangeli wrote:
    > did you try specweb with apache? that's super heavy mremap as far as I
    > know (and it maybe using anon memory, and if not I certainly cannot
    > exclude other apps are using mremap on significant amounts of anymous
    > ram). To a point that the kmap_lock for the persistent kmaps I used
    > originally in mremap (at least it has never been racy) was a showstopper
    > bottleneck spending most of system time there (profiling was horrible in
    > the kmap_lock) and I had to fixup the 2.6 way with the per-cpu atomic
    > kmaps to avoid being an order of magnitude slower than in the small
    > boxes w/o highmem.

    No. I have never had access to systems set up for specweb.


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