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From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
To: Alan <alan@lxorguk.ukuu.org.uk>
Cc: Steven Scholz <steven.scholz@imc-berlin.de>, linux-ide@vger.kernel.org
Subject: Re: Impact of no_lba48{_dma} = 1 ?
Date: Wed, 07 Feb 2007 17:10:52 +0300	[thread overview]
Message-ID: <45C9DDEC.508@ru.mvista.com> (raw)
In-Reply-To: <20070207141149.5c0c709b@localhost.localdomain>

Hello.

Alan wrote:

>>>>>Only relevant for DMA really

>>>>So rqsize is only needed for DMA accesses?

>>    Not really, it affects both PIO and DMA.

> Yes but its not relevant. The question was about performance, and your
> performance will suck equally with PIO regardless of the request size
> limit.

    Performace would suck even more with the single sector transfers. :-)

> Alan

MBR, Sergei

  parent reply	other threads:[~2007-02-07 14:10 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-07  9:56 Impact of no_lba48{_dma} = 1 ? Steven Scholz
2007-02-07 11:58 ` Alan
2007-02-07 13:25   ` Steven Scholz
2007-02-07 13:53     ` Alan
2007-02-07 13:49       ` Sergei Shtylyov
2007-02-07 14:11         ` Alan
2007-02-07 14:03           ` Steven Scholz
2007-02-07 14:19             ` Alan
2007-02-07 14:10           ` Sergei Shtylyov [this message]
2007-02-07 13:57       ` Steven Scholz
2007-02-07 14:09         ` Sergei Shtylyov
2007-02-07 14:16         ` Alan

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