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    SubjectRe: 2.6.17-rc5-mm1
    On Mon, 2006-06-05 at 11:43 -0700, Christoph Lameter wrote:
    > On Mon, 5 Jun 2006, Andy Whitcroft wrote:
    > > Ok. Did a split search on -mm2 for this. With the full stack I was
    > > still tripping up on the bad thread hand-off trigger above. However,
    > > when split searching I seemed to get somewhat different panics pretty
    > > commonly in the allocator. My split search led me to the start of the
    > > swapless page migration patches:
    > >
    > > GOOD:page-migration-cleanup-pass-mapping-to-migration-functions.patch
    > > GOOD:page-migration-cleanup-move-fallback-handling-into-special-function.patch
    > > ----:swapless-pm-add-r-w-migration-entries.patch
    > > -BAD:swapless-pm-add-r-w-migration-entries-fix-2.patch
    > So it happens with r-w-migration-entries but not without fix-2? Or does
    > it require the fix-2 in order to happen? Without the fix page migration
    > is broken.
    > Does LTP include any page migration tests? Guess not? If not then this
    > could be simply due to code rearrangement making the problem appear in a
    > different way.
    > Which test did this?
    > Swap migration uses the two higest numbers of swap types (30 and 31). If
    > those are generated by something then we could have trouble but I do not
    > see how the patches could hurt otherwise.
    ltp has many weird swap tests

    (and I assume you're not talking about the pte's that are swapped, but
    only the file type in the swap signature; since the higher bits in the
    pte are used by the non-linear vma feature afaik)

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