linux-kernel - Re: SATA exceptions with 2.6.20-rc5

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Date:	Sun, 14 Jan 2007 20:25:57 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Björn Steinbrink <B.Steinbrink@....de>,
	linux-kernel@...r.kernel.org, htejun@...il.com
Subject: Re: SATA exceptions with 2.6.20-rc5

Jeff Garzik wrote:
>> Looks like all of these errors are from a FLUSH CACHE command and the 
>> drive is indicating that it is no longer busy, so presumably done. 
>> That's not a DMA-mapped command, so it wouldn't go through the ADMA 
>> machinery and I wouldn't have expected this to be handled any 
>> differently from before. Curious..
> 
> It's possible the flush-cache command takes longer than 30 seconds, if 
> the cache is large, contents are discontiguous, etc.  It's a 
> pathological case, but possible.
> 
> Or maybe flush-cache doesn't get a 30 second timeout, and it should...? 
>  (thinking out loud)
> 
>     Jeff

If the flush was still in progress I would expect Busy to still be set, 
however..

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@...pamshaw.ca
Home Page: http://www.roberthancock.com/

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