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    SubjectRe: [PATCH] memcgroup: check and initialize page->cgroup in memmap_init_zone
    KAMEZAWA Hiroyuki wrote::
    > On Fri, 18 Apr 2008 12:32:56 +0900
    > KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
    >
    >>> Or perhaps that page was used and then later freed before we got to
    >>> memmap_init_zone() and was freed with a non-zero ->page_cgroup. Which is
    >>> unlikely given that page.page_cgroup was only just added and is only
    >>> present if CONFIG_CGROUP_MEM_RES_CTLR.
    >>>
    >> Hmm, I'll try his .config and see what happens.
    >>
    > I reproduced the hang with his config and confirmed his fix works well.
    > But I can't find why...I'll dig a bit more.

    If i use CONFIG_SPARSEMEM instead of CONFIG_DISCONTIGMEM, the kernel
    boots successfully.



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