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From: Albert Lee <albertcc@tw.ibm.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: albertl@mail.com, Sergei Shtylyov <sshtylyov@ru.mvista.com>,
	Bahadir Balban <bahadir.balban@gmail.com>,
	linux-ide@vger.kernel.org, Mikael Pettersson <mikpe@it.uu.se>
Subject: Re: ide/dma not working from 2.6.19 to 2.6.21
Date: Tue, 26 Jun 2007 13:05:43 +0800	[thread overview]
Message-ID: <46809EA7.5090005@tw.ibm.com> (raw)
In-Reply-To: <20070625101009.48269d6e@the-village.bc.nu>

Alan Cox wrote:
>>Reloading the pata_pdc2027x module then the problem goes away.
>>I guess maybe somehow mdelay() is not as precise as before...
> 
> 
> It's not the most accurate of things once power management and the like
> get invovled. HT doesn't help it either. You should have get much more
> accurate timing information if you query gettimeofday before/after and do
> a few loops.
> 

Thanks for the advice. Patch to follow.

--
albert


  reply	other threads:[~2007-06-26  5:05 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-21 11:47 ide/dma not working from 2.6.19 to 2.6.21 Bahadir Balban
2007-06-21 15:28 ` Sergei Shtylyov
2007-06-21 18:17   ` Sergei Shtylyov
2007-06-25  5:22   ` Albert Lee
2007-06-25  9:10     ` Alan Cox
2007-06-26  5:05       ` Albert Lee [this message]
2007-06-26  5:43         ` [PATCH 1/1] libata: pata_pdc2027x PLL input clock fix Albert Lee
2007-07-02 14:14           ` Jeff Garzik
2007-07-02 18:13           ` Bartlomiej Zolnierkiewicz
2007-07-02 18:00             ` Sergei Shtylyov
2007-07-03  5:21               ` [PATCH 1/1] ide: pdc202xx_new " Albert Lee
2007-07-03 14:24                 ` Sergei Shtylyov
2007-07-03 18:59                   ` Bartlomiej Zolnierkiewicz
2007-07-03 20:36                     ` Sergei Shtylyov
2007-07-04  8:20                       ` Albert Lee
2007-07-03 18:57                 ` Bartlomiej Zolnierkiewicz
2007-07-20 14:38                 ` Bahadir Balban
  -- strict thread matches above, loose matches on Subject: below --
2007-06-21 15:29 ide/dma not working from 2.6.19 to 2.6.21 Mikael Pettersson

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