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    SubjectRe: [PATCH 0/3] NUMA boot hash allocation interleaving
    --On Tuesday, December 14, 2004 20:13:48 +0100 Andi Kleen <> wrote:

    > On Tue, Dec 14, 2004 at 10:59:50AM -0800, Martin J. Bligh wrote:
    >> > NUMA systems running current Linux kernels suffer from substantial
    >> > inequities in the amount of memory allocated from each NUMA node
    >> > during boot. In particular, several large hashes are allocated
    >> > using alloc_bootmem, and as such are allocated contiguously from
    >> > a single node each.
    >> Yup, makes a lot of sense to me to stripe these, for the caches that
    > I originally was a bit worried about the TLB usage, but it doesn't
    > seem to be a too big issue (hopefully the benchmarks weren't too
    > micro though)

    Well, as long as we stripe on large page boundaries, it should be fine,
    I'd think. On PPC64, it'll screw the SLB, but ... tough ;-) We can either
    turn it off, or only do it on things larger than the segment size, and
    just round-robin the rest, or allocate from node with most free.

    >> didn't Manfred or someone (Andi?) do this before? Or did that never
    >> get accepted? I know we talked about it a while back.
    > I talked about it, but never implemented it. I am not aware of any
    > other implementation of this before Brent's.

    Cool, must have been my imagination ;-)


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