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

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Message-ID: <20090408062621.GG17934@one.firstfloor.org>
Date:	Wed, 8 Apr 2009 08:26:21 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Russ Anderson <rja@....com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, x86@...nel.org
Subject: Re: [PATCH] [2/16] POISON: Add page flag for poisoned pages

> > @@ -104,6 +107,9 @@
> >  #ifdef CONFIG_IA64_UNCACHED_ALLOCATOR
> >  	PG_uncached,		/* Page has been mapped as uncached */
> >  #endif
> > +#ifdef CONFIG_MEMORY_FAILURE
> 
> Is it necessary to have this under CONFIG_MEMORY_FAILURE?

That was mainly so that !MEMORY_FAILURE 32bits NUMA architectures who
might not use sparsemap/vsparsemap get a few more zone bits in page flags
to play with. Not sure those really exist, so it might be indeed
redundant, but it seemed safer.


-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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