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    SubjectRe: combinatorial explosion in lockdep
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    On Tue, 2008-07-29 at 23:56 -0700, David Miller wrote:
    > From: David Miller <davem@davemloft.net>
    > Date: Tue, 29 Jul 2008 21:45:03 -0700 (PDT)
    >
    > > If we can agree on this as a fix, it should definitely be backported
    > > and submitted for -stable :-)
    > >
    > > ----------------------------------------
    > >
    > > lockdep: Fix combinatorial explosion in lock subgraph traversal.
    >
    > So the next problem I run into is that 8192 is not a large
    > enough MAX_LOCKDEP_ENTRIES for this larger cpu count boxes.
    > 8192 isn't even big enough for my 64 cpu box.
    >
    > It needs to be scaled by NR_CPUS, or something like that.

    Or something like that indeed - if distro kernels are going to be build
    using NR_CPUS=4096, then these tables might explode - then again,
    lockdep is only enabled on -debug kernels anyway...

    So yeah.



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