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From: Mark Lord <liml@rtr.ca>
To: Tejun Heo <tj@kernel.org>
Cc: Robert Hancock <hancockrwd@gmail.com>,
	Jeff Garzik <jeff@garzik.org>, Chuck Ebbert <cebbert@redhat.com>,
	linux-ide@vger.kernel.org
Subject: Re: libata timeouts when stressing a Samsung HDD
Date: Thu, 19 Feb 2009 10:27:07 -0500	[thread overview]
Message-ID: <499D7A4B.5010804@rtr.ca> (raw)
In-Reply-To: <4993A57D.6010107@gmail.com>

 >ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
 >ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
 >         res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
 >ata1.00: status: { DRDY }

>>> I wonder if it's just a case of too short a timeout on the cache flushes?
..
> However, in this case the drive is not reporting Busy status at the 
> timeout, which suggests maybe an interrupt got lost or something. (Could 
> be still the drive's fault.)
..

If I recall correctly, The reported shadow register contents are bogus
when a timeout occurs.  So we don't actually know what the drive state was.

Or do we, Tejun?

  reply	other threads:[~2009-02-19 15:27 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-02-02 21:40 libata timeouts when stressing a Samsung HDD Chuck Ebbert
2009-02-11  1:30 ` Tejun Heo
2009-02-11  4:08   ` Mark Lord
2009-02-11 20:29     ` Chuck Ebbert
2009-02-11 22:03       ` Mark Lord
2009-02-11 22:11         ` Jeff Garzik
2009-02-11 22:29           ` Mark Lord
2009-02-11 22:54             ` Chuck Ebbert
2009-02-12 16:10               ` Mark Lord
2009-02-12 16:13                 ` Mark Lord
2009-02-16  3:12                   ` Tejun Heo
2009-02-16 21:30                     ` Chuck Ebbert
2009-02-19  6:21                       ` Tejun Heo
2009-02-19 16:41                         ` Greg Freemyer
2009-02-20  0:33                           ` Tejun Heo
2009-02-12  4:28           ` Robert Hancock
2009-02-19 15:27             ` Mark Lord [this message]
2009-02-20  0:32               ` Tejun Heo
2009-02-20  2:52                 ` Robert Hancock
2009-02-20  3:26                   ` Tejun Heo
2009-03-01 19:31                     ` Robert Hancock
2009-03-01 20:28                       ` Alan Cox
2009-02-11 20:24   ` Chuck Ebbert

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