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    SubjectRe: mremap sleeping in incorrect context
    Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
    >
    > Just had that in my log, running 2.6.0-test2. I'm not familiar
    > with this code, but Arjan says this is an old problem that was
    > fixed ages ago, maybe the fix was lost ?
    >
    > Debug: sleeping function called from invalid context at
    > mm/page_alloc.c:545
    > Call trace:
    > [c000c1a8] dump_stack+0x18/0x28
    > [c0021044] __might_sleep+0x6c/0x84
    > [c004e33c] __alloc_pages+0x338/0x33c
    > [c0014940] pte_alloc_one+0x24/0x160
    > [c005c224] pte_alloc_map+0x88/0x2a8
    > [c0065a40] move_one_page+0xd0/0x2a4
    > [c0065c6c] move_page_tables+0x58/0xb8
    > [c0065d60] move_vma+0x94/0x824
    > [c00666f4] do_mremap+0x204/0x468
    > [c00669d4] sys_mremap+0x7c/0xcc

    oops. What are your CONFIG_HIGHMEM and CONFIG_HIGHPTE settings there?
    -
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