LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: l.genoni@oltrelinux.com
To: Robert Hancock <hancockr@shaw.ca>
Cc: Alan <alan@lxorguk.ukuu.org.uk>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Luigi Genoni <genoni@sns.it>,
	l.genoni@sns.it
Subject: Re: [BUG?] ata disk running maximum at DMA33 with 2.6.20 and new pata driver, NV CK804 ide controller.
Date: Thu, 8 Feb 2007 13:33:16 +0100 (CET)	[thread overview]
Message-ID: <Pine.LNX.4.64.0702081332330.24105@Phoenix.oltrelinux.com> (raw)
In-Reply-To: <45CAA8EA.2010505@shaw.ca>

Well, the cable is OK, of course I checked.

On Wed, 7 Feb 2007, Robert Hancock wrote:

> Date: Wed, 07 Feb 2007 22:36:58 -0600
> From: Robert Hancock <hancockr@shaw.ca>
> To: Alan <alan@lxorguk.ukuu.org.uk>,
>     linux-kernel <linux-kernel@vger.kernel.org>
> Cc: Luigi Genoni <genoni@sns.it>
> Subject: Re: [BUG?] ata disk running maximum at DMA33 with 2.6.20 and new pata
>      driver, NV CK804 ide controller.
> Resent-Date: Thu, 08 Feb 2007 05:47:22 +0100
> Resent-From: <l.genoni@sns.it>
> 
> Alan wrote:
>> On Wed, 7 Feb 2007 01:19:36 +0100
>> Luigi Genoni <genoni@sns.it> wrote:
>> 
>>> Hi,
>>> since upgrading to kernel 2.6.20 my pata disk, using new pata driver, is
>>> initialized maximum  in DMA33 mode (and obviously performances drop 
>>> consequently), as you can see from:
>> 
>> Interesting.
>> 
>>> Willing to test any patch.
>> 
>> Firstly can you see if its consistently the case that booting 2.6.20
>> gives UDMA33 and 2.6.19 UDMA100 over a few reboots. If it is please drop
>> the 2.6.19 drivers/ata/pamd_amd into 2.6.20 and try that.
>
> As an aside to this sort of problem, shouldn't we print some kind of loud 
> message in dmesg when we force a high-UDMA-capable device down to UDMA33 due 
> to a 40-wire cable detection? In the case where it truly is a 40-wire cable 
> the user may want to know that and replace the cable, if it isn't it gives 
> more of a hint of why the drive isn't running at full speed..
>
> -- 
> Robert Hancock      Saskatoon, SK, Canada
> To email, remove "nospam" from hancockr@nospamshaw.ca
> Home Page: http://www.roberthancock.com/
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
>

  reply	other threads:[~2007-02-08 12:33 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <fa.xQT7YaGQERXkjuW4tC35jsdiTD0@ifi.uio.no>
     [not found] ` <fa.Bv1nbk8Z669RxoYF6zPFpsCsyd4@ifi.uio.no>
2007-02-08  4:36   ` Robert Hancock
2007-02-08 12:33     ` l.genoni [this message]
2007-02-09 20:16     ` Alan
2007-02-07  0:19 Luigi Genoni
2007-02-07 10:03 ` venom
2007-02-07 12:20 ` Alan
2007-02-07 12:44   ` l.genoni
  -- strict thread matches above, loose matches on Subject: below --
2007-02-06 23:48 l.genoni

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=Pine.LNX.4.64.0702081332330.24105@Phoenix.oltrelinux.com \
    --to=l.genoni@oltrelinux.com \
    --cc=alan@lxorguk.ukuu.org.uk \
    --cc=genoni@sns.it \
    --cc=hancockr@shaw.ca \
    --cc=l.genoni@sns.it \
    --cc=linux-kernel@vger.kernel.org \
    --subject='Re: [BUG?] ata disk running maximum at DMA33 with 2.6.20 and new pata driver, NV CK804 ide controller.' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).