Re: [PATCH] [2/16] POISON: Add page flag for poisoned pages

Andi Kleen
2009-04-08T06:22:35Z

On Tue, Apr 07, 2009 at 10:14:21PM -0700, Andrew Morton wrote:
> On Tue, 7 Apr 2009 17:09:58 +0200 (CEST) Andi Kleen <andi@firstfloor.org> wrote:
>
> > Poisoned pages need special handling in the VM and shouldn't be touched
> > again. This requires a new page flag. Define it here.
>
> I wish this patchset didn't change/abuse the well-understood meaning of
> the word "poison".

Sorry, that's the terminology on the hardware side.

If there's much confusion I could rename it HwPoison or somesuch?

> > The page flags wars seem to be over, so it shouldn't be a problem
> > to get a new one. I hope.
>
> They are? How did it all get addressed?

Allowing 64bit to use more and using [V]SPARSEMAP to limit flags
use for zones. I think.

-Andi

--
ak@linux.intel.com -- Speaking for myself only.