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Date:      Wed, 19 Feb 2003 13:12:53 -0800
From:      Lars Eggert <larse@ISI.EDU>
To:        Poul-Henning Kamp <phk@phk.freebsd.dk>
Cc:        current@freebsd.org, craig@xfoil.gank.org
Subject:   Re: Page fault on disk-less machine
Message-ID:  <3E53F355.7060604@isi.edu>
In-Reply-To: <4239.1045685928@critter.freebsd.dk>
References:  <4239.1045685928@critter.freebsd.dk>
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[-- Attachment #1 --]
Poul-Henning Kamp wrote:
> Fatal trap 12: page fault while in kernel mode

FWIW, Craig Boston and me see the same panics (threads on -current: 
"panic starting gnome" and "VFS panic (possibly NFS-locking related?)").

> fault virtual address   = 0x34
> fault code              = supervisor read, page not present
> instruction pointer     = 0x8:0xc018fd20
> stack pointer           = 0x10:0xc5fd27a4
> frame pointer           = 0x10:0xc5fd27c0
> 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         = 414 (cron)
> kernel: type 12 trap, code=0
> Stopped at      0xc018fd20 = _mtx_lock_flags+0x40:      cmpl    $0xc02c1160,0(%ecx)
> db> trace
> _mtx_lock_flags(34,0,c02a5f56,9e,c0d9e1e0) at 0xc018fd20 = _mtx_lock_flags+0x40
> namei(c5fd29b8,c5fd2c34,c044,c0570d00,c0d9e1e0) at 0xc01de06d = namei+0x16d
> vn_open_cred(c5fd29b8,c5fd2980,0,c0554e00,c02167cf) at 0xc01efce8 = vn_open_cred+0x258
> nfs_dolock(c5fd2b98,758,c0e066a8,c0db3e10,c0e066a8) at 0xc02230f5 = nfs_dolock+0x2c5
> nfs_advlock(c5fd2b98,0,c029ee60,761,c02b6800) at 0xc0222578 = nfs_advlock+0x58
> fdrop_locked(c0db3e10,c0d9e1e0,c029ee60,69e,6002) at 0xc017fa28 = fdrop_locked+0x138
> fdrop(c0db3e10,c0d9e1e0,c018fe06,c03b3e58,6002) at 0xc017f50e = fdrop+0x3e
> closef(c0db3e10,c0d9e1e0,c029ee60,595,0) at 0xc017f4bc = closef+0x12c
> fdfree(c0d9e1e0,0,c029f2f4,f2,1) at 0xc017ed46 = fdfree+0x116
> exit1(c0d9e1e0,100,c029f2f4,73,c5fd2d40) at 0xc0184bc7 = exit1+0x3b7
> sys_exit(c0d9e1e0,c5fd2d10,c02b0451,407,1) at 0xc0184801 = sys_exit+0x41
> syscall(2f,2f,2f,0,ffffffff) at 0xc027dc07 = syscall+0x257
> Xint0x80_syscall() at 0xc026dabd = Xint0x80_syscall+0x1d
> --- syscall (1, FreeBSD ELF32, sys_exit), eip = 0x280c36bf, esp = 0xbfbffbec, ebp = 0xbfbffc08 ---
> db>
> 

Lars
-- 
Lars Eggert <larse@isi.edu>           USC Information Sciences Institute

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