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    SubjectRe: [patch 1/13] Qsort
    Date
    On Tuesday 25 January 2005 07:51, Andi Kleen wrote:
    > > FWIW, we already have a Shell sort for the ngroups stuff in
    > > kernel/sys.c:groups_sort() that could be made generic.
    >
    > Sounds like a good plan. Any takers?

    It would slow down the groups case (unless we leave the specialized version
    in). Gcc doesn't inline a cmp function pointer, and a C preprocessor
    templatized version would be really ugly. A variant with of this routine with
    qsort like interface should be good enough for nfsacl and xfs though.

    Nevertheless, xfs and nfsacl have very similar requirements:

    nfsacl: at most 1024 elements; 8-byte elements (16 on 64-bit archs)

    xfs (from Nathan): at most 1024 elements (with 64K blocksize); 8-byte or
    larger elements

    Cheers.
    --
    Andreas Gruenbacher <agruen@suse.de>
    SUSE Labs, SUSE LINUX PRODUCTS GMBH
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