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    SubjectRe: x86_64: 2.6.14 with NUMA panics at boot


    --Andi Kleen <ak@suse.de> wrote (on Monday, October 31, 2005 03:12:17 +0100):

    > On Monday 31 October 2005 01:17, Bob Picco wrote:
    >
    >> This is a slightly modified patch I used on x86_64 for EXTREME testing. The
    >> original 2.6.13-rc1-mhp1 patch didn't apply cleanly against 2.6.14. It will
    >> apply with this untested patch. The patch needs to have arch_sparse_init
    >> which is only active for SPARSEMEM. This patch was just for testing EXTREME
    >> on x86_64 NUMA and needs review.
    >>
    >> I think the bootmem allocator is being used before initialized. This
    >> wouldn't have happened before SPARSEMEM_EXTREME became the default.
    >>
    >> If you feel my analysis is correct, I'll generate a cleaner patch and
    >> test on my 4 way.
    >
    > Ok the question is - why did nobody submit this patch in time? When
    > sparse was merged I assumed folks would actually test and maintain
    > it. But that doesn't seem to be the case? Somewhat surprising.
    >
    > I personally don't care much about sparsemem right now because it doesn't have
    > any advantage and if it's unmaintained would consider to mark it
    > CONFIG_BROKEN. That's simply because we can't have highly experimental
    > CONFIGs in a production kernel that unsuspecting users can just set and break
    > their configuration.
    >
    > Dave, is there someone in charge for sparsemem on x86-64?

    Sparsemem is Andy's baby. He is duly cc'ed.

    M.



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