From: Daniel Phillips <phillips@arcor.de>
To: Andrew Morton <akpm@zip.com.au>,
William Lee Irwin III <wli@holomorphy.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, riel@surriel.com
Subject: Re: statm_pgd_range() sucks!
Date: Mon, 2 Sep 2002 00:02:38 +0200 [thread overview]
Message-ID: <E17lcnn-0004cP-00@starship> (raw)
In-Reply-To: <3D6EDDC0.F9ADC015@zip.com.au>
On Friday 30 August 2002 04:51, Andrew Morton wrote:
> William Lee Irwin III wrote:
> > (1) shared, lib, text, & total are now reported as what's mapped
> > instead of what's resident. This actually fixes two bugs:
>
> hmm. Personally, I've never believed, or even bothered to try to
> understand what those columns are measuring. Does anyone actually
> find them useful for anything? If so, what are they being used for?
> What info do we really, actually want to know?
I don't know what use 'shared' is, but it's clearly not very accurate
since it's just adding up all pages with count >= 1. The only remotely
correct thing to do here is check for multiple pte reverse pointers.
--
Daniel
WARNING: multiple messages have this Message-ID (diff)
From: Daniel Phillips <phillips@arcor.de>
To: Andrew Morton <akpm@zip.com.au>,
William Lee Irwin III <wli@holomorphy.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, riel@surriel.com
Subject: Re: statm_pgd_range() sucks!
Date: Mon, 2 Sep 2002 00:02:38 +0200 [thread overview]
Message-ID: <E17lcnn-0004cP-00@starship> (raw)
In-Reply-To: <3D6EDDC0.F9ADC015@zip.com.au>
On Friday 30 August 2002 04:51, Andrew Morton wrote:
> William Lee Irwin III wrote:
> > (1) shared, lib, text, & total are now reported as what's mapped
> > instead of what's resident. This actually fixes two bugs:
>
> hmm. Personally, I've never believed, or even bothered to try to
> understand what those columns are measuring. Does anyone actually
> find them useful for anything? If so, what are they being used for?
> What info do we really, actually want to know?
I don't know what use 'shared' is, but it's clearly not very accurate
since it's just adding up all pages with count >= 1. The only remotely
correct thing to do here is check for multiple pte reverse pointers.
--
Daniel
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next prev parent reply other threads:[~2002-09-01 21:56 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-30 1:58 statm_pgd_range() sucks! William Lee Irwin III
2002-08-30 1:58 ` William Lee Irwin III
2002-08-30 2:51 ` Andrew Morton
2002-08-30 2:51 ` Andrew Morton
2002-08-30 3:12 ` William Lee Irwin III
2002-08-30 3:12 ` William Lee Irwin III
2002-08-30 3:54 ` Andrew Morton
2002-08-30 3:54 ` Andrew Morton
2002-08-30 17:45 ` Gerrit Huizenga
2002-08-30 17:45 ` Gerrit Huizenga
2002-09-01 22:02 ` Daniel Phillips [this message]
2002-09-01 22:02 ` Daniel Phillips
2002-09-05 3:20 ` William Lee Irwin III
2002-09-05 3:20 ` William Lee Irwin III
2002-09-05 4:48 ` Andrew Morton
2002-09-05 4:48 ` Andrew Morton
2002-09-05 6:05 ` William Lee Irwin III
2002-09-05 6:05 ` William Lee Irwin III
2002-09-05 6:49 ` Andrew Morton
2002-09-05 6:49 ` Andrew Morton
2002-09-05 7:07 ` William Lee Irwin III
2002-09-05 7:07 ` William Lee Irwin III
2002-09-05 6:22 ` William Lee Irwin III
2002-09-05 6:22 ` William Lee Irwin III
2002-08-30 8:24 ` Anton Blanchard
2002-08-30 8:24 ` Anton Blanchard
2002-08-30 8:31 ` William Lee Irwin III
2002-08-30 8:31 ` William Lee Irwin III
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