linux-kernel - Re: [PATCH 1/3] Make the IDE DMA timeout modifiable

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Date:	Tue, 12 Jun 2007 23:11:18 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	Suleiman Souhlal <ssouhlal@...ebsd.org>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] Make the IDE DMA timeout modifiable

Bartlomiej Zolnierkiewicz wrote:
>>On Feb 20, 2007, at 5:44 PM, Bartlomiej Zolnierkiewicz wrote:

>>>On Wednesday 21 February 2007 02:19, Suleiman Souhlal wrote:

>>>>It can be changed via /proc/ide/hd?/settings.

>>>Why do we need to change IDE DMA timeout dynamically?

>>I've used it to test error recovery (for example).

> Seems quite useable for developers but I would prefer not to
> expose it in production kernels for end users.

    It seems that I have counter example of a customer asking if this timeout 
can be done configurable. :-)
    BTW, why the timeout is so damn long? 2*WAIT_CMD is 20 secs, and if DMA is 
not complete or interrupt pending, it may wait 10 more secs...

> Thanks,
> Bart

MBR, Sergei
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