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    SubjectRe: [PATCH 6/7] mm: add CONFIG_DEBUG_VM_RB build option
    On 09/16/2012 09:07 PM, Hugh Dickins wrote:
    >> What was the way that
    >> Hugh used to reproduce the other issue?
    > I've lost track of which issue is "other".

    The other was meant to be the BUG I hit.

    > To reproduce Sasha's interval_tree.c warnings, all I had to do was switch
    > on CONFIG_DEBUG_VM_RB (I regret not having done so before) and boot up.
    > I didn't look to see what was doing the mremap which caused the warning
    > until now: surprisingly, it's microcode_ctl. I've not made much effort
    > to get the right set of sources and work out why that would be using
    > mremap (a realloc inside a library?).
    > I failed to reproduce your BUG in huge_memory.c, but what I was trying
    > was SuSE update via yast2, on several machines; but perhaps because
    > they were all fairly close to up-to-date, I didn't hit a problem.
    > (That was before I turned on DEBUG_VM_RB for Sasha's.)

    The good news are that I cannot reproduce either with the patch applied.

    suse labs

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