Re: Oops with DCACHE_WORD_ACCESS and ocfs2, autofs4

[Linus Torvalds]

Forgot to actually add Peter and Ingo to the cc..

                    Linus

On Wed, May 2, 2012 at 10:57 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> The word-at-a-time code assumes that no allocation will be the last
> page (whether kmalloc or normal page allocation), which was always
> somewhat optimistic but I thought it would be true on PC's.
>
> And that %rbp value does *not* look like end-of-memory, but maybe
> there is something else than just the CONFIG_DEBUG_PAGEALLOC that
> causes us to punch holes even in the kernel memory map.
>
> Peter, Ingo - do we unmap kernel pages for PAT etc attributes?
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