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From: William Lee Irwin III <>
To: Per Andreas Buer <>
Subject: Re: 2.4: mylex and > 2GB RAM
Date: Mon, 8 Dec 2003 13:02:01 -0800	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <1070917304.1260.44.camel@localhost.localdomain>

On Mon, 2003-12-08 at 21:22, William Lee Irwin III wrote:
>> It could potentially slow it down a lot more than a few percent.
>> The main effect you would see is heavy low memory consumption (LowFree:
>> going down to almost nothing) and very heavy cpu consumption.

On Mon, Dec 08, 2003 at 10:01:45PM +0100, Per Andreas Buer wrote:
> Right on. LowFree drops and when it reaches almost nothing the system
> more or less goes freezes. 
> The DAC960 driver is not a SCSI driver so this means that there is
> something wrong with the PCI-DMA transfers, right?
> Replacing the DAC960 with another RAID-kontroller will not help because
> it will use the same PCI-DMA transfers, right? Any hints on how I can
> mend this?

Actually, this suggests lowmem starvation due to bounce buffering.

-- wli

  reply	other threads:[~2003-12-08 21:02 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-12-08 15:24 2.4: mylex and > 2GB RAM Per Buer
2003-12-08 15:36 ` William Lee Irwin III
2003-12-08 15:54   ` Per Buer
2003-12-08 16:22     ` William Lee Irwin III
2003-12-08 20:15       ` Per Andreas Buer
2003-12-08 20:22         ` William Lee Irwin III
2003-12-08 21:01           ` Per Andreas Buer
2003-12-08 21:02             ` William Lee Irwin III [this message]
2003-12-08 21:25               ` Per Andreas Buer
2003-12-08 21:36                 ` William Lee Irwin III
2003-12-09 10:31             ` Marcelo Tosatti
2003-12-10 13:21               ` Per Buer
2003-12-08 20:40         ` Zwane Mwaikambo
2003-12-08 15:58 Hank Leininger

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