From owner-freebsd-current  Tue Apr 21 23:48:11 1998
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In-Reply-To: <Pine.NEB.3.95.980422080836.22471A-100000@korin.warman.org.pl>
Date: Tue, 21 Apr 1998 23:46:36 -0700 (PDT)
Reply-To: Jonathan Hanna <pangolin@rogers.wave.ca>
Organization: Pangolin Systems
From: Jonathan Hanna <pangolin@rogers.wave.ca>
To: Andrzej Bialecki <abial@nask.pl>
Subject: RE: Ouch... (DEVFS)
Cc: freebsd-current@FreeBSD.ORG
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On 22-Apr-98 Andrzej Bialecki wrote:
> Hi!
> 
> I have two problems with DEVFS (sources are from yesterday).
> 
> 1. Running multiuser, as soon as I try to umount the DOS partition,
> machine panics with something like:
> 
> _panic
> _wdcontrol
> _wdintr
> Xresume14()
> --- interrupt
> vec14
> _pmap_enter
> _vm_fault
> _trap_pfault
> calltrap
> --- trap
> 
>>cont
> 
> syncing disks 19 19 19 19 [...] .... giving up
> rebooting
> 
> This is 100% repeatable.

Same here. It happens when I mount both an msdos and an ffs slice from
the same disk. I tracked it a little in an earlier version of DEVFS/SLICE:

I don't know how things are supposed to work but
it seems that msdos_unmount is calling wdsclose via VOP_CLOSE,
setting the du->dk_state to CLOSE.
Later an ffs_unmout is done, which tries an operation on
the now closed disk and panics.

I am mounting msdos on wd1s1
and ufs on wd1s2a,e,f,g.


Jonathan Hanna <pangolin@rogers.wave.ca>


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