Date: Wed, 26 Aug 1998 08:56:12 +0200 (CEST) From: Andrzej Bialecki <abial@nask.pl> To: Julian Elischer <julian@whistle.com> Cc: freebsd-current@FreeBSD.ORG Subject: Re: Panic with DEVFS Message-ID: <Pine.BSF.4.00.9808260843510.16828-100000@korin.warman.org.pl> In-Reply-To: <Pine.BSF.3.95.980825115443.1236E-100000@current1.whistle.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 25 Aug 1998, Julian Elischer wrote:
> is it possible to find out which device it is?
Doesn't matter (at least with a dozen of my tests, when I was disabling
various devices).
>
> disabled devices should not show up in devfs as they
They don't. I checked it - I was able to do 'ls -l', and got the full
listing, and in a second or two later the machine panics. I'm totally lame
when it comes to FS internals, but this looks to me as if some delayed
action (caching? cleaning? read-ahead? whatever?) is causing this.
I'm receiving also another error related to / on MFS: when I press
Ctrl-Alt-Del, the system should sync disks and then unmount them, right?
but I'm getting 'unmount of / failed (30)' which means EROFS, which is
strange because / is mounted r/w. Any ideas?
> should not be probed and the probe routine should be responsible for
> adding the devfs entries..
> (actually the attach routine but...)
> except for devices that do not probe, (e.g. /dev/mem)
> which do it in their init routine.
>
>
>
>
>
> On Tue, 25 Aug 1998, Andrzej Bialecki wrote:
>
> > Hi,
> >
> > It was pointed to me that it's very easy to panic -current system running
> > DEVFS on /dev, with / on MFS.
> >
> > The problem manifested itself with picobsd floppy. The following scenario
> > causes panic with "mfs_strategy: bad dev":
> >
> > 1. boot with -c
> > 2. disable at least one device
> > 3. log in
> > 4. cd /dev
> > 5. ls -l
> >
> > What's funny is that when I do 'ls' (without -l) in step 5., everything is
> > ok.
> >
> > My guess is that DEVFS doesn't like these devices which are present in
> > kernel, but are disabled...
> >
> > Andrzej Bialecki
> >
> > +---------------------+------------------------+--------------------------+
> > | <abial@nask.pl> | When in problem or in | if(halt_per_mth > 0) { |
> > | Research & Academic | doubt, run in circles, | fetch("FreeBSD"); |
> > | Network in Poland | scream and shout. | } |
> > + --------------------+------------------------+--------------------------+
> >
> >
> >
> > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > with "unsubscribe freebsd-current" in the body of the message
> >
>
>
Andrzej Bialecki
+---------------------+------------------------+--------------------------+
| <abial@nask.pl> | When in problem or in | if(halt_per_mth > 0) { |
| Research & Academic | doubt, run in circles, | fetch("FreeBSD"); |
| Network in Poland | scream and shout. | } |
+ --------------------+------------------------+--------------------------+
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.00.9808260843510.16828-100000>