linux-kernel - Re: [PATCH] mm,x86: initialize high mem before free_all

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Message-ID: <20111206102622.GC3105@redhat.com>
Date:	Tue, 6 Dec 2011 11:26:23 +0100
From:	Stanislaw Gruszka <sgruszka@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-mm@...ck.org, x86@...nel.org, linux-kernel@...r.kernel.org,
	Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] mm,x86: initialize high mem before free_all_bootmem()

On Tue, Dec 06, 2011 at 09:25:55AM +0100, Ingo Molnar wrote:
> The thing is, the pagealloc bug you fixed basically kept 
> pagealloc debugging essentially disabled for a really long time, 
> correct?
Yes, it worked only in special cases.
 
> So i'd expect there to be quite a few latent problems - 
> i'll give it some more testing before pushing out the result.
Ehh, I expect them too, but fortunately only with CONFIG_DEBUG_PAGEALLOC,
non-debug kernel are not affected.

Thanks
Stanislaw 
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