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    SubjectRe: [PATCH -mm] only drop root anon_vma if not self
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    On Fri, Jun 11, 2010 at 5:30 PM, Dave Young <hidave.darkstar@gmail.com> wrote:
    > On Fri, Jun 11, 2010 at 5:17 PM, Catalin Marinas
    > <catalin.marinas@arm.com> wrote:
    >> Dave Young <hidave.darkstar@gmail.com> wrote:
    >>> On Thu, Jun 10, 2010 at 7:21 PM, Catalin Marinas
    >>> <catalin.marinas@arm.com> wrote:
    >>>> On Thu, 2010-06-10 at 02:30 +0100, Dave Young wrote:
    >>>>> On Thu, Jun 10, 2010 at 9:16 AM, Rik van Riel <riel@redhat.com> wrote:
    >>>>> > On Wed, 9 Jun 2010 17:19:02 +0800
    >>>>> > Dave Young <hidave.darkstar@gmail.com> wrote:
    >>>>> >
    >>>>> >> > Manually bisected mm patches, the memleak caused by following patch:
    >>>>> >> >
    >>>>> >> > mm-extend-ksm-refcounts-to-the-anon_vma-root.patch
    >>>>> >>
    >>>>> >>
    >>>>> >> So I guess the refcount break, either drop-without-get or over-drop
    >>>>> >
    >>>>> > I'm guessing I did not run the kernel with enough debug options enabled
    >>>>> > when I tested my patches...
    >>>>> >
    >>>>> > Dave & Catalin, thank you for tracking this down.
    >>>>> >
    >>>>> > Dave, does the below patch fix your issue?
    >>>>>
    >>>>> Yes, it fixed the issue. Thanks.
    >>>>
    >>>> Thanks for investigating this issue.
    >>>>
    >>>> BTW, without my kmemleak nobootmem patch (and CONFIG_NOBOOTMEM enabled),
    >>>> do you get other leaks (false positives).
    >>>
    >>> I didn't see difference before/after apply your patch, how to test
    >>> specific to bootmem?
    >>
    >> With Rik's patch applied and CONFIG_NOBOOTMEM enabled, do you get any
    >> false postives if my kmemleak patch isn't applied?
    >
    > No more, except a few acpi issue which always there
    >

    I got an oops when shutdown kvm guest with rik's patch applied, but
    without your bootmem patch, is it kmemleak problem?

    attached the screendump

    >>
    >> Thanks.
    >>
    >> --
    >> Catalin
    >>
    >
    >
    >
    > --
    > Regards
    > dave
    >



    --
    Regards
    dave
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