The following reply was made to PR kernel/6381; it has been noted by GNATS.
From: Kenneth R Westerback <kwesterb...@rogers.com>
To: Aaron Stellman <z...@x96.org>
Cc: Kenneth R Westerback <kwesterb...@rogers.com>, gn...@cvs.openbsd.org
Subject: Re: kernel/6381: ehci kernel panic, mass storage on sansa c250 mp3
player insertion
Date: Thu, 20 May 2010 15:21:54 -0400
On Thu, May 20, 2010 at 12:05:40PM -0700, Aaron Stellman wrote:
> On Thu, May 20, 2010 at 12:26:08AM -0400, Kenneth R Westerback wrote:
> > Can you plug it into non-ehci ports to see if this is ehci related?
> >
> > .... Ken
> >
> After further investigation, it turns out it's the hotplugd which is
> causing the problem. I have only attach script, and here are the
> contents that are causing panic:
>
> #!/bin/sh
>
> DEVCLASS=$1
> DEVNAME=$2
>
> case $DEVCLASS in
> 2)
> # disk devices
> disklabel=`/sbin/disklabel $DEVNAME 2>&1 | \
> sed -n '/^label: /s/^label: //p'`
> ;;
> 3)
> # network devices; requires hostname.$DEVNAME
> sh /etc/netstart $DEVNAME
> ;;
> esac
>
> If I comment out disklabel, no panic happens. Preprending "sleep 2"
> right before running disklabel, doesn't change anything.
> Could there be some sort of race condition, since hotplugd will fork two
> children, to run attach for sd{1,2}?
Aha. This is a known but still mysterious problem.
.... Ken
