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SubjectRe: 2.6.10-rc1-mm4
On Wed, 10 Nov 2004, Andrew Morton wrote:

> Thomas Schlichter <thomas.schlichter@web.de> wrote:
> >
> > Today I tested the linux-2.6.10-rc1-mm4 kernel and it works fine with the
> > attached config. But if I enable HIGHPTE, that kernel hits following BUG
> > (written down by hand) and panics when the INIT process is started:
> >
> > kernel BUG at arch/i386/mm/highmem.c:63!
> > EIP is at kunmap_atomic+0x27/0x70
> > Call Trace
> > show_stack+0xa6/0xb0
> > show_register+0x14d/0x1c0
> > die+0x158/0x2e0
> > do_invalid_op+0xef/0x100
> > error_code+0x2b/0x30
> > copy_pte_range+0x122/0x490
>
> This might help:
>
>
>
>
> We're modifying src_pte and dst_pte in the for-loop, and then unmapping the
> modified pointers. If one of them walked off the end of the page then blam.

Thanks that fixed it (but you already knew that).

Zwane

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