From: Markus Lidel <Markus.Lidel@shadowconnect.com>
To: Andi Kleen <ak@suse.de>
Cc: linux-scsi@vger.kernel.org, devel@openvz.org
Subject: Re: 64bit DMA in i2o_block
Date: Fri, 22 Sep 2006 13:47:56 +0200 [thread overview]
Message-ID: <4513CD6C.9050606@shadowconnect.com> (raw)
In-Reply-To: <p73lkoci32y.fsf@verdi.suse.de>
Hello,
Andi Kleen wrote:
> Markus Lidel <Markus.Lidel@shadowconnect.com> writes:
>> I believe it's a driver issue. Do you have a testing-system where you
>> could try out the appended patch?
> So it would bug instead?
Yes, because ATM i don't know why it doesn't work. It's just for debugging.
> Can you please just get rid of that CONFIG? Such things shouldn't
> be CONFIGs, but have a suitable default. In particular drivers
> running under 64bit should always support 64bit DMA.
The 64-bit DMA is only available on Adaptec controllers, all other I2O
controllers only work with 32-bit DMA. Although the 64-bit DMA is (as far
as i can remember) slower then the 32-bit DMA and is therefore only
useful on systems which run out of memory.
Best regards,
Markus Lidel
------------------------------------------
Markus Lidel (Senior IT Consultant)
Shadow Connect GmbH
Carl-Reisch-Weg 12
D-86381 Krumbach
Germany
Phone: +49 82 82/99 51-0
Fax: +49 82 82/99 51-11
E-Mail: Markus.Lidel@shadowconnect.com
URL: http://www.shadowconnect.com
next prev parent reply other threads:[~2006-09-22 11:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-22 9:10 64bit DMA in i2o_block Vasily Averin
2006-09-22 10:14 ` Markus Lidel
2006-09-22 10:54 ` Andi Kleen
2006-09-22 11:47 ` Markus Lidel [this message]
2006-09-22 11:39 ` Vasily Averin
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