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From: Con Kolivas <kernel@kolivas.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: jos poortvliet <jos@mijnkamer.nl>,
	ck@vds.kolivas.org, linux-kernel@vger.kernel.org
Subject: Re: [ck] Re: Swap prefetch merge plans
Date: Sat, 10 Feb 2007 07:50:22 +1100	[thread overview]
Message-ID: <200702100750.22487.kernel@kolivas.org> (raw)
In-Reply-To: <20070209123029.633934eb.akpm@linux-foundation.org>

On Saturday 10 February 2007 07:30, Andrew Morton wrote:
> On Fri, 09 Feb 2007 14:13:03 +0100
>
> jos poortvliet <jos@mijnkamer.nl> wrote:
> > Nick's comment, replying to me some time ago:
>
> I think I was thinking of this:
>
> 	http://lkml.org/lkml/2006/2/6/509

Fortunately that predates a lot of changes where I did address all those. 
These will seem out of context without looking at that original email so I 
apologise in advance.

buffered_rmqueue and prefetching x86 specific (not into DMA) were dropped

It is NUMA aware

Global cacheline bouncing in page allocation and page reclaim paths I have no 
answer for as I have to tell swap prefetch that the vm is busy somehow and I 
do that by setting precisely one bit in a lockless manner.

The trylocks were dropped.

The other ideas were to :
-extend the prefetching. That's extra features
-knowing for sure when a system is really idle. I've tried hard to do that as 
cheaply as possible.
-putting pages on the lru? well it puts them on the tail
-papering over an issue? As I said, no matter how good the vm is, there will 
always be loads that swap.

-- 
-ck

  reply	other threads:[~2007-02-09 20:52 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <200702091038.37143.kernel@kolivas.org>
     [not found] ` <200702092054.10232.ocilent1@gmail.com>
     [not found]   ` <200702092321.20615.kernel@kolivas.org>
2007-02-09 13:13     ` jos poortvliet
2007-02-09 13:22       ` Con Kolivas
2007-02-09 14:00         ` jos poortvliet
2007-02-09 13:56       ` Con Kolivas
2007-02-09 20:30       ` Andrew Morton
2007-02-09 20:50         ` Con Kolivas [this message]
2007-02-09 22:49           ` Con Kolivas
2007-02-09 23:35         ` [ck] " Chuck Ebbert
2007-02-09 23:54           ` Randy Dunlap
2007-02-10 16:12             ` jos poortvliet

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