linux-kernel - Re: [PATCH] x86: fix PAE pmd

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Message-ID: <20080508154431.GL23990@us.ibm.com>
Date:	Thu, 8 May 2008 08:44:31 -0700
From:	Nishanth Aravamudan <nacc@...ibm.com>
To:	Dave Hansen <dave@...ux.vnet.ibm.com>
Cc:	Hans Rosenfeld <hans.rosenfeld@....com>,
	Hugh Dickins <hugh@...itas.com>, Ingo Molnar <mingo@...e.hu>,
	Jeff Chua <jeff.chua.linux@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Gabriel C <nix.or.die@...glemail.com>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] x86: fix PAE pmd_bad bootup warning

On 08.05.2008 [07:52:30 -0700], Dave Hansen wrote:
> On Thu, 2008-05-08 at 16:34 +0200, Hans Rosenfeld wrote:
> > While trying to reproduce this, I noticed that the huge page wouldn't
> > leak when I just mmapped it and exited without explicitly unmapping, as
> > I described before. The huge page is leaked only when the
> > /proc/self/pagemap entry for the huge page is read.
> 
> Well, that's an interesting data point! :)

Indeed it is! Would explain why we've not seen any leaks until now. I
will try to investigate, as well.

Thanks,
Nish

-- 
Nishanth Aravamudan <nacc@...ibm.com>
IBM Linux Technology Center
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