Messages in this thread | | | Date | Fri, 29 May 2009 12:10:24 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH] [1/16] HWPOISON: Add page flag for poisoned pages |
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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 <andi@firstfloor.org> 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 ?
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