|From:||Rik van Riel <riel-AT-redhat.com>|
|To:||Andi Kleen <andi-AT-firstfloor.org>|
|Subject:||Re: [PATCH] [1/16] HWPOISON: Add page flag for poisoned pages|
|Date:||Fri, 29 May 2009 12:10:24 -0400|
|Cc:||Alan Cox <alan-AT-lxorguk.ukuu.org.uk>, akpm-AT-linux-foundation.org, linux-kernel-AT-vger.kernel.org, linux-mm-AT-kvack.org, fengguang.wu-AT-intel.com|
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 <email@example.com> 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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to firstname.lastname@example.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"email@example.com"> firstname.lastname@example.org </a>
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