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    SubjectRe: Hang on x86-64, 2.6.9-rc3-bk4
    Andrew Morton wrote:
    > Jeff Garzik <> wrote:
    >>>Can we get a sysrq-M dump from that machine please?
    >> alas, for the 'hang' case, my during-initscripts console is going to
    >> strange place. here's sysrq-m from 2.6.9-rc3-bk4 with the mm/vmscan.c
    >> patch reverted (the its-fixed version).
    > Is cool - I was wondering if you had the same funny NUMA zone layout. You
    > do not.
    > So there's some new non-terminating condition in there. It's definitely
    > the case that we're still failing to throttle kswapd as we should be doing,
    > but I left it as-is due to lack of reported problems (hah) and because the
    > fix does cause less reclaim via kswapd and more reclaim via direct reclaim.
    > Still. The relevant patches, in order, are at
    > vmscan-total_scanned-fix.patch
    > revert-vm-no-wild-kswapd.patch
    > balance_pgdat-cleanup.patch
    > no-wild-kswapd-2.patch
    > no-wild-kswapd-kswapd-continue.patch
    > I expect the first one will fix this up. Can you confirm?

    FWIW, I verified that "vmscan-total_scanned-fix.patch" fixes the hang on
    both 2.6.9-rc3-bk4 and 2.6.9-final.


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