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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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