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    SubjectRe: [PATCH] [1/16] HWPOISON: Add page flag for poisoned pages
    Andi Kleen wrote:
    > On Wed, May 27, 2009 at 10:15:10PM +0100, Alan Cox wrote:
    >> On Wed, 27 May 2009 22:12:26 +0200 (CEST)
    >> Andi Kleen <> wrote:
    >>> Hardware poisoned pages need special handling in the VM and shouldn't be
    >>> touched again. This requires a new page flag. Define it here.
    >> Why can't you use PG_reserved ? That already indicates the page may not
    >> even be present (which is effectively your situation at that point).
    > Right now a page must be present with PG_reserved, otherwise /dev/mem, /proc/kcore
    > lots of other things will explode.

    Could we use a combination of, say PG_reserved and
    PG_writeback to keep /dev/mem and /proc/kcore from
    exploding ?

    All rights reversed.

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