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    SubjectRe: x86_64: 2.6.14-rc4 swiotlb broken
    On Mon, Oct 17, 2005 at 08:27:40AM -0700, Linus Torvalds wrote:
    >
    >
    > On Mon, 17 Oct 2005, Andi Kleen wrote:
    > >
    > > The patch is actually not quite correct - in theory node 0 could be too small
    > > to contain the full swiotlb bounce buffers.
    >
    > Is node 0 guaranteed to be all low-memory? What if it allocates stuff at
    > the end of memory on NODE(0)?
    >
    > Anyway, it sounds like "alloc_bootmem_low_pages()" is seriously buggered
    > if it allocates non-low pages, if only because of its name...
    >
    > > The real fix would be to get rid of the pgdata lists and just walk the
    > > node_online_map on bootmem.c. The memory hotplug guys have
    > > a patch pending for this.
    >
    > Argh. Which one should I pick? The NODE(0) one looks simpler, but is it
    > sufficient for now in practice (with the real one going into 2.6.14+)?

    That's the reason I made a small patch. It does work on the boxes we use.
    But I like Yasunori-san's patch. Mine is just a chewing gum fix.

    Thanks,
    Kiran
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