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    SubjectRe: [Linaro-mm-sig] [PATCH 12/15] drivers: add Contiguous Memory Allocator
    Hi Marek,

    With v19, I can't seem to allocate big regions anymore (e.g. 101MiB).
    In particular, this seems to fail:

    On Thu, Jan 26, 2012 at 11:00 AM, Marek Szyprowski
    <m.szyprowski@samsung.com> wrote:
    > +static int cma_activate_area(unsigned long base_pfn, unsigned long count)
    > +{
    > +       unsigned long pfn = base_pfn;
    > +       unsigned i = count >> pageblock_order;
    > +       struct zone *zone;
    > +
    > +       WARN_ON_ONCE(!pfn_valid(pfn));
    > +       zone = page_zone(pfn_to_page(pfn));
    > +
    > +       do {
    > +               unsigned j;
    > +               base_pfn = pfn;
    > +               for (j = pageblock_nr_pages; j; --j, pfn++) {
    > +                       WARN_ON_ONCE(!pfn_valid(pfn));
    > +                       if (page_zone(pfn_to_page(pfn)) != zone)
    > +                               return -EINVAL;

    The above WARN_ON_ONCE is triggered, and then the conditional is
    asserted (page_zone() retuns a "Movable" zone, whereas zone is
    "Normal") and the function fails.

    This happens to me on OMAP4 with your 3.3-rc1-cma-v19 branch (and a
    bunch of remoteproc/rpmsg patches).

    Do big allocations work for you ?

    Thanks,
    Ohad.
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