From: Hugh Dickins <hugh@veritas.com>
To: William Lee Irwin III <wli@holomorphy.com>
Cc: Andrew Morton <akpm@digeo.com>, <linux-kernel@vger.kernel.org>,
<linux-mm@kvack.org>
Subject: Re: 2.5.73-mm2
Date: Tue, 1 Jul 2003 12:08:03 +0100 (BST) [thread overview]
Message-ID: <Pine.LNX.4.44.0307011202550.1217-100000@localhost.localdomain> (raw)
In-Reply-To: <20030701105134.GE26348@holomorphy.com>
On Tue, 1 Jul 2003, William Lee Irwin III wrote:
> On Tue, Jul 01, 2003 at 11:46:34AM +0100, Hugh Dickins wrote:
> > If you pursued it, wouldn't your patch also need to change
> > nr_free_buffer_pages() to do what you think it does, count
> > the free lowmem pages? It, and nr_free_pagecache_pages(),
> > and nr_free_zone_pages(), are horribly badly named. They
> > count present_pages-pages_high, they don't count free pages:
> > okay for initialization estimates, useless for anything dynamic.
>
> Well, I was mostly looking for getting handed back 0 when lowmem is
> empty; I actually did realize they didn't give entirely accurate counts
> of free lowmem pages.
I'm not pleading for complete accuracy, but nr_free_buffer_pages()
will never hand back 0 (if your system managed to boot).
It's a static count of present_pages (adjusted), not of
free pages. Or am I misreading nr_free_zone_pages()?
Hugh
next prev parent reply other threads:[~2003-07-01 10:52 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-28 3:21 2.5.73-mm2 Andrew Morton
2003-06-28 8:56 ` 2.5.73-mm2 William Lee Irwin III
2003-06-28 15:54 ` 2.5.73-mm2 William Lee Irwin III
2003-06-28 16:08 ` 2.5.73-mm2 Christoph Hellwig
2003-06-28 20:49 ` 2.5.73-mm2 William Lee Irwin III
2003-06-29 0:34 ` 2.5.73-mm2 Martin J. Bligh
2003-06-29 2:18 ` 2.5.73-mm2 William Lee Irwin III
2003-06-29 3:07 ` 2.5.73-mm2 Martin J. Bligh
2003-06-28 23:00 ` 2.5.73-mm2 Andrew Morton
2003-06-28 23:11 ` 2.5.73-mm2 William Lee Irwin III
2003-06-29 12:45 ` 2.5.73-mm2 Zwane Mwaikambo
2003-07-02 3:11 ` 2.5.73-mm2 William Lee Irwin III
2003-06-29 19:04 ` [patch] 2.5.73-mm2: let CONFIG_TC35815 depend on CONFIG_TOSHIBA_JMR3927 Adrian Bunk
2003-06-29 21:04 ` Ralf Baechle
2003-07-01 0:39 ` 2.5.73-mm2 William Lee Irwin III
2003-07-01 2:14 ` 2.5.73-mm2 Andrew Morton
2003-07-01 2:46 ` 2.5.73-mm2 William Lee Irwin III
2003-07-01 10:46 ` 2.5.73-mm2 Hugh Dickins
2003-07-01 10:51 ` 2.5.73-mm2 William Lee Irwin III
2003-07-01 11:08 ` Hugh Dickins [this message]
2003-07-01 11:08 ` 2.5.73-mm2 William Lee Irwin III
2003-07-01 12:39 ` 2.5.73-mm2 Nikita Danilov
2003-07-01 5:56 ` 2.5.73-mm2 William Lee Irwin III
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