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From: Mark Lord <liml@rtr.ca>
To: Tejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jgarzik@pobox.com>,
	IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: Re: libata total system lockup fix
Date: Fri, 19 Aug 2005 00:01:34 -0400	[thread overview]
Message-ID: <4305599E.4000303@rtr.ca> (raw)
In-Reply-To: <430555F6.4090709@gmail.com>

One idea would be to inject more faults into disk (ATA)
as opposed to the Optical (ATAPI) drives, and see if doing
so in combination with the existing ATAPI poll/fails will
trigger things more quickly.

This can be done by using Passthru to issue invalid commands
to a drive, which the drive will reject with "Drive Status Errors".

I just tried it now on a whim, using "hdparm -Z /dev/sda",
and my system never recovered until I used ctrl-alt-sysreq-b.

Now mind you, "hdparm -Z" sends a Seagate vendor-unique opcode
(to my Fujitsu hard drive), and perhaps that maps to something
the Fujitsu recognized or choked on..  But one could edit
hdparm to send a NOP or something instead.

Cheers

  reply	other threads:[~2005-08-19  4:01 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-07-25 13:47 libata total system lockup fix Mark Lord
2005-07-25 14:51 ` Jeff Garzik
2005-07-25 15:53   ` Mark Lord
2005-08-05  3:52     ` Tejun Heo
2005-08-05  4:01       ` Tejun Heo
2005-08-11 20:13         ` Jeff Garzik
2005-08-12  0:49           ` Tejun Heo
2005-08-12  2:22             ` Mark Lord
2005-08-12  2:38               ` Tejun Heo
2005-08-12  2:41                 ` Tejun Heo
2005-08-09 15:16       ` Mark Lord
2005-08-09 23:54         ` Tejun Heo
2005-08-10 14:16           ` Mark Lord
2005-08-10 21:24       ` Jeff Garzik
2005-08-19  0:46         ` Mark Lord
2005-08-19  3:21           ` Tejun Heo
2005-08-19  3:36             ` Mark Lord
2005-08-19  3:45               ` Tejun Heo
2005-08-19  4:01                 ` Mark Lord [this message]
2005-08-19  9:37               ` Erik Slagter
2005-08-19  9:35           ` Erik Slagter
2005-08-19 13:07             ` Mark Lord
2005-08-19 13:32               ` Bartlomiej Zolnierkiewicz
2005-08-19 13:37                 ` Bartlomiej Zolnierkiewicz
2005-09-03 22:58           ` Mark Lord
2005-09-03 23:06             ` Jeff Garzik

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