From: Andrew Morton <akpm@osdl.org>
To: Con Kolivas <kernel@kolivas.org>
Cc: ck@vds.kolivas.org, nickpiggin@yahoo.com.au,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: Respin: [PATCH] mm: limit lowmem_reserve
Date: Wed, 5 Apr 2006 20:40:09 -0700 [thread overview]
Message-ID: <20060405204009.3235b021.akpm@osdl.org> (raw)
In-Reply-To: <200604061258.40487.kernel@kolivas.org>
Con Kolivas <kernel@kolivas.org> wrote:
>
> On Thursday 06 April 2006 12:55, Con Kolivas wrote:
> > On Thursday 06 April 2006 12:43, Andrew Morton wrote:
> > > Con Kolivas <kernel@kolivas.org> wrote:
> > > > It is possible with a low enough lowmem_reserve ratio to make
> > > > zone_watermark_ok fail repeatedly if the lower_zone is small enough.
> > >
> > > Is that actually a problem?
> >
> > Every single call to get_page_from_freelist will call on zone reclaim. It
> > seems a problem to me if every call to __alloc_pages will do that?
>
> every call to __alloc_pages of that zone I mean
>
One would need to check with the NUMA guys. zone_reclaim() has a
(lame-looking) timer in there to prevent it from doing too much work.
That, or I'm missing something. This problem wasn't particularly well
described, sorry.
next prev parent reply other threads:[~2006-04-06 3:41 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-02 4:01 2.6.16-ck3 Con Kolivas
2006-04-02 4:46 ` 2.6.16-ck3 Nick Piggin
2006-04-02 8:51 ` 2.6.16-ck3 Con Kolivas
2006-04-02 9:37 ` 2.6.16-ck3 Nick Piggin
2006-04-02 9:39 ` [ck] 2.6.16-ck3 Con Kolivas
2006-04-02 9:51 ` Nick Piggin
2006-04-03 2:48 ` lowmem_reserve question Con Kolivas
2006-04-03 4:42 ` Mike Galbraith
2006-04-03 4:48 ` Con Kolivas
2006-04-03 4:50 ` [ck] " Con Kolivas
2006-04-03 5:14 ` Mike Galbraith
2006-04-03 5:18 ` Con Kolivas
2006-04-03 5:31 ` Mike Galbraith
2006-04-04 2:35 ` [ck] " Con Kolivas
2006-04-06 1:10 ` [PATCH] mm: limit lowmem_reserve Con Kolivas
2006-04-06 1:29 ` Respin: " Con Kolivas
2006-04-06 2:43 ` Andrew Morton
2006-04-06 2:55 ` Con Kolivas
2006-04-06 2:58 ` Con Kolivas
2006-04-06 3:40 ` Andrew Morton [this message]
2006-04-06 4:36 ` Con Kolivas
2006-04-06 4:52 ` Con Kolivas
2006-04-07 6:25 ` Nick Piggin
2006-04-07 9:02 ` Con Kolivas
2006-04-07 12:40 ` Nick Piggin
2006-04-08 0:15 ` Con Kolivas
2006-04-08 0:55 ` Nick Piggin
2006-04-08 1:01 ` Con Kolivas
2006-04-08 1:25 ` Nick Piggin
2006-05-17 14:11 ` Con Kolivas
2006-05-18 7:11 ` Nick Piggin
2006-05-18 7:21 ` Con Kolivas
2006-05-18 7:26 ` Nick Piggin
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