linux-kernel - Re: [PATCH 4/5] teach smaps_pte

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Message-ID: <20110223153104.GD2810@mgebm.net>
Date:	Wed, 23 Feb 2011 10:31:04 -0500
From:	Eric B Munson <emunson@...bm.net>
To:	Dave Hansen <dave@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Michael J Wolf <mjwolf@...ibm.com>,
	Andrea Arcangeli <aarcange@...hat.com>, akpm@...l.org,
	Mel Gorman <mel@....ul.ie>,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH 4/5] teach smaps_pte_range() about THP pmds

On Mon, 21 Feb 2011, Dave Hansen wrote:

> 
> v2 - used mm->page_table_lock to fix up locking bug that
> 	Mel pointed out.  Also remove Acks since things
> 	got changed significantly.
> 
> This adds code to explicitly detect  and handle
> pmd_trans_huge() pmds.  It then passes HPAGE_SIZE units
> in to the smap_pte_entry() function instead of PAGE_SIZE.
> 
> This means that using /proc/$pid/smaps now will no longer
> cause THPs to be broken down in to small pages.
> 
> Signed-off-by: Dave Hansen <dave@...ux.vnet.ibm.com>

Reviewed-and-tested-by: Eric B Munson <emunson@...bm.net>

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