linux-kernel - Re: [PATCH bugfix] proc/pagemap: correctly report non-present ptes and holes between vmas

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Message-ID: <4F9C19DB.2050601@parallels.com>
Date:	Sat, 28 Apr 2012 20:24:59 +0400
From:	Pavel Emelyanov <xemul@...allels.com>
To:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <ak@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH bugfix] proc/pagemap: correctly report non-present ptes
 and holes between vmas

On 04/28/2012 08:22 PM, Konstantin Khlebnikov wrote:
> This patch resets current pagemap-entry if current pte isn't present,
> or if current vma is over. Otherwise pagemap reports last entry again and again.
> 
> non-present pte reporting was broken in commit v3.3-3738-g092b50b
> ("pagemap: introduce data structure for pagemap entry")
> 
> reporting for holes was broken in commit v3.3-3734-g5aaabe8
> ("pagemap: avoid splitting thp when reading /proc/pid/pagemap")
> 
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org>
> Reported-by: Pavel Emelyanov <xemul@...allels.com>
> Cc: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Cc: Andi Kleen <ak@...ux.intel.com>

Acked-by: Pavel Emelyanov <xemul@...allels.com>

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