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Date:      Mon, 28 Jan 2002 09:43:10 +1030
From:      Greg Lehey <grog@FreeBSD.org>
To:        Martin Blapp <mb@imp.ch>
Cc:        Bernd Walter <ticso@cicely8.cicely.de>, freebsd-stable@FreeBSD.ORG, tmm@FreeBSD.ORG
Subject:   Re: double fault with vinum and 4.5 RC3
Message-ID:  <20020128094310.C72512@wantadilla.lemis.com>
In-Reply-To: <20020127195120.K68322-100000@levais.imp.ch>
References:  <20020127153009.B92489@cicely8.cicely.de> <20020127195120.K68322-100000@levais.imp.ch>

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On Sunday, 27 January 2002 at 19:53:52 +0100, Martin Blapp wrote:
>
> I just got another panic while executing;
>
> vinum resetconfig

Why are you using resetconfig?  It's almost never needed.

> Fatal trap 12: page fault while in kernel mode
> fault virtual address   = 0x28
> fault code              = supervisor read, page not present
> instruction pointer     = 0x8:0xc135abcb
> stack pointer           = 0x10:0xcdad8d20
> frame pointer           = 0x10:0xcdad8d34
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, def32 1, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 271 (vinum)
> interrupt mask          = none
> kernel: type 12 trap, code=0
> Stopped at      driveio+0x47:   movl    0x28(%eax),%eax
>
> driveio(c12520fc,c11aa200,200,1000,0) at driveio+0x47
> remove_drive(1,4649,c134c380,cdad8d8c,c135c131) at remove_drive+0x79
> free_vinum(1,cdad8de4,c134c380,cbfae700,cdad8ea8) at free_vinum+0x26
> vinumioctl(c134c380,4649,cdad8ea8,3,cbfae700) at vinumioctl+0x47d
> spec_ioctl(cdad8de4,cdad8dcc,c02634e1,cdad8de4,cdad8e74) at spec_ioctl+0x26
> spec_vnoperate(cdad8de4,cdad8e74,c01d41ab,cdad8de4,c1312b80) at
> spec_vnoperate+0x15
> ufs_vnoperatespec(cdad8de4,c1312b80,3,0,c02f80a0) at ufs_vnoperatespec+0x15
> vn_ioctl(c1312b80,4649,cdad8ea8,cbfae700,cbfae700) at vn_ioctl+0x10f
> ioctl(cbfae700,cdad8f80,bfbffb88,bfbffb93,8095d39) at ioctl+0x20a
> syscall2(2f,2f,2f,8095d39,bfbffb93) at syscall2+0x1f5
> Xint0x80_syscall() at Xint0x80_syscall+0x25

I'd guess that this is some race condition I've never seen before.  
I've asked you several times now to read
http://www.vinumvm.org/vinum/how-to-debug.html and supply me the
information I ask for there.  In particular, I need log output.

Greg
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