Message-ID: <4166066C.3030008@cyberone.com.au>
Date: Fri, 08 Oct 2004 13:15:56 +1000
From: Nick Piggin <piggin@cyberone.com.au>
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To: Andrew Morton <akpm@osdl.org>
CC: chrisw@osdl.org, nickpiggin@yahoo.com.au, linux-kernel@vger.kernel.org,
       Dave Jones <davej@codemonkey.org.uk>
Subject: Re: kswapd in tight loop 2.6.9-rc3-bk-recent
References: <20041007142019.D2441@build.pdx.osdl.net>	<20041007164044.23bac609.akpm@osdl.org>	<4165E0A7.7080305@yahoo.com.au>	<20041007174242.3dd6facd.akpm@osdl.org>	<20041007184134.S2357@build.pdx.osdl.net>	<20041007185131.T2357@build.pdx.osdl.net>	<20041007185352.60e07b2f.akpm@osdl.org>	<4165FF7B.1070302@cyberone.com.au> <20041007200109.57ce24ae.akpm@osdl.org>
In-Reply-To: <20041007200109.57ce24ae.akpm@osdl.org>
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Andrew Morton wrote:

>Nick Piggin <piggin@cyberone.com.au> wrote:
>
>>>Chris Wright <chrisw@osdl.org> wrote:
>>>
>> >
>> >>(whereas I could get the mainline code, and the
>> >> one-liner to spin right off).  
>> >>
>> >
>> >How?  (up to and including .config please).
>> >
>> >
>> >
>>
>> Ah, free_pages <= pages_high, ie. 0 <= 0, which is true;
>> commence spinning.
>>
>
>Maybe.  It requires that the zonelists be screwy:
>
>

Note that if this *was* the problem, then it would not be the fault of
my recent patch, rather *every* allocation (when memory is lowish)
would cause kswapd to wind through its priority loop then stop.
Probably not using enough CPU for anyone to really notice though.

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