Date: Sun, 17 Jun 2001 12:49:34 -0700 (PDT) From: David Wolfskill <david@catwhisker.org> To: current@freebsd.org Subject: panic for today -- dsp_clone+0xee after moused started Message-ID: <200106171949.f5HJnY605482@bunrab.catwhisker.org>
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OK; this is a(nother) "page fault while in kernel mode," but I suspect it's one I hadn't seen mentioned yet. The "good news" is that it is eminently reproducible. :-} Also, I was able to boot kernel.old OK, so hat should decrease the probability that the problem is (strictly) somewhere in userland. As usual (for me), this is on my laptop. Recent CVSup history: CVSup begin from cvsup14.freebsd.org at Fri Jun 15 03:47:01 PDT 2001 CVSup ended from cvsup14.freebsd.org at Fri Jun 15 04:07:33 PDT 2001 CVSup begin from cvsup14.freebsd.org at Sat Jun 16 03:47:00 PDT 2001 CVSup ended from cvsup14.freebsd.org at Sat Jun 16 03:52:48 PDT 2001 CVSup begin from cvsup14.freebsd.org at Sun Jun 17 03:47:00 PDT 2001 CVSup ended from cvsup14.freebsd.org at Sun Jun 17 03:52:46 PDT 2001 (I had built each of -STABLE & -CURRENT after each one, and booted each successfully (running at least a few things), save for today's -CURRENT. And yes, I always buildworld, kernel, installworld, mergemaster.) The first couple of lines are from the console log: Initial rc.i386 initialization: apm. Configuring syscons: blank_time moused. Fatal trap 12: page fault while in kernel mode fault virtual address = 0xc fault code = supervisor read, page not present instruction pointer = 0x8:0xc018fe1a stack pointer = 0x10:0xce5a4d40 frame pointer = 0x10:0xce5a4d5c 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 = 363 (ln) kernel: type 12 trap, code =0 Stopped at dsp_clone+0xee: movl 0xc(%ebx),%edx db> trace dsp_clone(0,ce5a4dc4,3,ce5a44a8,c17ae818) at dsp_clone+0xee devfs_lookupx(ce5a4e24,c17ae018,1,0,cc36c760) at devfs_lookupx+0x2b1 devfs_lookup(ce5a4e24,cd233da0,ce5a4ed0,ce5a4ea8,cc36c760) at devfs_lookup+0x31 lookup(ce5a4ea8,cc36c87c,cc36c760,cc36c760,cc36c760) at lookup+0x291 namei(ce5a4ea8,cc36c87c,cc36c760,2,bfbffe65) at namei+0x177 lstat(cc36c760,ce5a4f80,bfbffdc4,bfbffe65,bfbffe5b) at lstat+0x41 syscall(2f,2f,2f,bfbffe5b,bfbffe65) at syscall+0x71d syscall_with_err_pushed() at syscall_with_err_pushed+0x1b db> show locks exclusive (sleep mutex) Giant (0xc047eb20) locked @ /usr/src/sys/vm/vm_fault.c:213 db> Now, back on 13 June, I had added another line to /etc/rc.devfs -- the line symlinking /dev/dsp0 to /dev/dsp; here are the lines I've added: # Setup DEVFS, ie permissions, links etc. # ln -fs /dev/ttyv0 /dev/vga ln -fs /dev/sysmouse /dev/mouse ln -fs /dev/mixer0 /dev/mixer ln -fs /dev/dsp0 /dev/dsp chmod a+r /dev/apm I note also that I tried looking at last week's -cvs-all (mailing list) archive, but I can't find it. I see today's (the start of this week's); I see weeks prior to last; just not last week. And I see last week's for (say) -current; no problem. Help? I'll try removing/commenting that last "dsp" line in /etc/rc.devfs just after sending this off.... Cheers, david -- David H. Wolfskill david@catwhisker.org As a computing professional, I believe it would be unethical for me to advise, recommend, or support the use (save possibly for personal amusement) of any product that is or depends on any Microsoft product. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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