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 17:00:40 +0200

 On Mon, Jul 25, 2011 at 08:44:24PM +0600, Eugene M. Zheganin wrote:
 > I tested it on today's STABLE (looks like the patch is against CURRENT, 
 > but I managed to apply it to STABLE, there was just some extra spaces in 
 > a couple of places). Seems to be working (do you need screens ?). At 
 > least I can say - the freeze timeout is now around 5 minutes 
 > (unfortunately, I didn't measure the exact amount of time), against one 
 > hour before the patch. Hop I will be able to diminish it even more by 
 > tuning the kern.cam.da.default_timeout.
 > Thanks for the great work.
 
 Do you get log entries regarding the removal of the disk in question
 in a timely manor, i.e. some seconds rather than minutes, like the
 following:
 Jul 24 21:13:49 flak kernel: (da0:mpt0:0:0:0): lost device
 Jul 24 21:13:49 flak kernel: (da0:mpt0:0:0:0): removing device entry
 and is it automatically detected as daX again when re-plugged?
 
 Marius