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    SubjectRe: bisected crash due to "x86: Move swiotlb initialization before dma32_free_bootmem"
    FUJITA Tomonori wrote:
    > On Tue, 15 Dec 2009 11:56:50 +0100
    > Ingo Molnar <mingo@elte.hu> wrote:
    >
    >> * FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> wrote:
    >>
    >>> There are a few people who hit this. How many people use a box with over
    >>> 256GB memory?
    >>>
    >>> And you can work around this with "dma32_size" kernel boot option.
    >> Well, since the kernel has not crashed before this change there's really just
    >> two options as per upstream kernel regression policy: either we fix it or we
    >> revert it.
    >
    > As I wrote, here is a patch that can be applied to cleanly to the git
    > head:
    >
    > http://www.kernel.org/pub/linux/kernel/people/tomo/misc/0001-x86-two-stage-swiotlb-initialization.patch
    >
    > It fixes the problem. Yinghai, can you test it? It should work but
    > it's good to confirm it.

    i tested already, it works.

    >
    > I simply wanted to say that it's not a bug that breaks lots of boxes
    > or leads to something serious like data corruption (no need to say
    > something like "revert it now!"). It's also worth investigating why it
    > breaks, I think.

    will look at it later

    YH



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