From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Thu, 25 Oct 2001 09:31:12 -0700 (PDT)
From: Linus Torvalds <torvalds@transmeta.com>
Subject: Re: xmm2 - monitor Linux MM active/inactive lists graphically
In-Reply-To: <dnvgh351i1.fsf@magla.zg.iskon.hr>
Message-ID: <Pine.LNX.4.31.0110250920270.2184-100000@cesium.transmeta.com>
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Sender: owner-linux-mm@kvack.org
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To: Zlatko Calusic <zlatko.calusic@iskon.hr>
Cc: Marcelo Tosatti <marcelo@conectiva.com.br>, linux-mm@kvack.org, lkml <linux-kernel@vger.kernel.org>
List-ID: <linux-mm.kvack.org>


On 25 Oct 2001, Zlatko Calusic wrote:
>
> Yes, I definitely have DMA turned ON. All parameters are OK. :)

I suspect it may just be that "queue_nr_requests"/"batch_count" is
different in -ac: what happens if you tweak them to the same values?

(See drivers/block/ll_rw_block.c)

I think -ac made the queues a bit deeper the regular kernel does 128
requests and a batch-count of 16, I _think_ -ac does something like "2
requests per megabyte" and batch_count=32, so if you have 512MB you should
try with

	queue_nr_requests = 1024
	batch_count = 32

Does that help?

		Linus

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