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Date: Thu, 8 May 2008 08:44:31 -0700
From: Nishanth Aravamudan <nacc@us.ibm.com>
Subject: Re: [PATCH] x86: fix PAE pmd_bad bootup warning
Message-ID: <20080508154431.GL23990@us.ibm.com>
References: <b6a2187b0805051806v25fa1272xb08e0b70b9c3408@mail.gmail.com> <20080506124946.GA2146@elte.hu> <Pine.LNX.4.64.0805061435510.32567@blonde.site> <alpine.LFD.1.10.0805061138580.32269@woody.linux-foundation.org> <Pine.LNX.4.64.0805062043580.11647@blonde.site> <20080506202201.GB12654@escobedo.amd.com> <1210106579.4747.51.camel@nimitz.home.sr71.net> <20080508143453.GE12654@escobedo.amd.com> <1210258350.7905.45.camel@nimitz.home.sr71.net>
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To: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Hans Rosenfeld <hans.rosenfeld@amd.com>, Hugh Dickins <hugh@veritas.com>, Ingo Molnar <mingo@elte.hu>, Jeff Chua <jeff.chua.linux@gmail.com>, Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>, Gabriel C <nix.or.die@googlemail.com>, Arjan van de Ven <arjan@linux.intel.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>

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@us.ibm.com>
IBM Linux Technology Center

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