kern/157534: [mpt] freeze when disk is removed/died from geom_mirror/zfs raid

[Marius Strobl]

The following reply was made to PR kern/157534; it has been noted by GNATS.

From: Marius Strobl <marius at alchemy.franken.de>
To: "Eugene M. Zheganin" <eugene at zhegan.in>
Cc: bug-followup at FreeBSD.org
Subject: Re: kern/157534: [mpt] freeze when disk is removed/died from geom_mirror/zfs raid
Date: Mon, 25 Jul 2011 17:30:53 +0200

 On Mon, Jul 25, 2011 at 09:05:14PM +0600, Eugene M. Zheganin wrote:
 > Exactly, I received these messages in seconds after disk removal, then I 
 > got freeze around 4-5 minutes (during which I thought that this was no 
 > success, and went to my office).
 
 Okay, that's basically all that can be done form the SIM, i.e. mpt(4),
 driver point of view. Maybe there's also room for improvement in da(4).
 The following patch may also help here but I'm not sure about that:
 http://people.freebsd.org/~mav/periph_noretry.patch
 
 > When I came there I saw messages like 'Invalidating pack' and 'Removing 
 > device entry' and the system was unfrozen. I didn't test the device 
 > reinsertion; but I can, if you like.
 
 Yes, it would be great if you could test that.
 
 Marius