linux-kernel - Re: [BUG] ide dma_timer

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Message-ID: <467ABC4D.5010004@ru.mvista.com>
Date:	Thu, 21 Jun 2007 21:58:37 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Linas Vepstas <linas@...tin.ibm.com>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	Stuart_Hayes@...l.com, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [BUG] ide dma_timer_expiry, then hard lockup

Hello.

Alan Cox wrote:

>>Google seems to show that there is no publically available 
>>firmware updates for Maxtor disks.

> There are for some but only if you irritate the tech support people.

>>hours at high cpu usage.... There were maybe a a dozen DriveReady
>>SeekComplete Timeout errors clustered a few minutes apart.  

> That suggests the drive is having problems occassionally and that the DMA
> path code then blows up when they occur.

>>Is there a way of viewing the contents of he command queue on
>>the hard drive, to see if the command actually made it across?

> queue ? You are overestimating IDE ;)

    He's not -- there is queued commands support since ATA[PI]-5. I'm not sure 
why but Linux decided not to support it.

MBR, Sergei
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