From owner-freebsd-hackers  Tue Mar 12  8: 4:54 2002
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Date: Tue, 12 Mar 2002 10:36:09 -0500
From: "Clark C . Evans" <cce@clarkevans.com>
To: Terry Lambert <tlambert2@mindspring.com>
Cc: Mike Makonnen <mike_makonnen@yahoo.com>,
	freebsd-hackers@freebsd.org
Subject: Re: panic: pmap_enter
Message-ID: <20020312103609.A41341@doublegemini.com>
References: <20020311210332.A38510@doublegemini.com> <1015919910.4901.5.camel@blackbox.pacbell.net> <3C8DBC98.508D76A9@mindspring.com>
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In-Reply-To: <3C8DBC98.508D76A9@mindspring.com>; from tlambert2@mindspring.com on Tue, Mar 12, 2002 at 12:30:16AM -0800
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On Tue, Mar 12, 2002 at 12:30:16AM -0800, Terry Lambert wrote:
| Mike Makonnen wrote:
| > It seems to me that you are showing only the last part of the trace,
| > which shows where a second panic occurred. While that may also be an
| > issue the real reason for the panic occurred earlier. Please post the
| > complete trace.

(after a core-dump of Python due to "bus error").  I can't seem
to get the core-dump off the box or I'd try to post it. 

dev=MFS2, bno =132, bsize=16384, size=16384, fs=/tmp
panic: ffs_blkfree: bad size
Debugger("panic")
db> trace
panic
fss_blkfree
fss_indirtrunc
fss_truncate
ufs_setattr
ufs_vnoperate
coredump
sigexit
postsig
syscall2
Xint0x80_syscall

I hope this is better.  Basically, I'm running a python
program that reads in fdisk information, and writes it
out.  Attached is the python code... it works a few times,
but then eventually crashes.  However, the general crashing
problem doesn't seem to be dependent on Python.

Best,

Clark

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import os, tempfile
class disk:
    def __init__(self,idx,typ='ad'):
        self.idx = idx; self.typ = typ
        (sin,sout,serr) = os.popen3("fdisk -s /dev/%s%d " % (typ,idx))
        if not(serr.readline()):
            self.valid = 1
            (x,cyl,y,hd,z,sec,q) = sout.readline().split()
            self.siz = int(cyl)*int(hd)*int(sec)
            sout.readline()
            self.blank = not(sout.readline())
        else:
            self.valid = 0
    def __repr__(self):
        if self.valid:
            return repr((self.typ,self.idx,self.blank,self.siz))
        return ''
    def partition(self):
        fn = tempfile.mktemp()
        f = open(fn,'w')
        f.write("p 1 165 0 %s\n" % self.siz)
        f.write("p 2 0 0 0\np 3 0 0 0\np 4 0 0 0\n")
        f.close()
        os.system("fdisk -f %s /dev/%s%d" % (fn,self.typ,self.idx))
        os.remove(fn)

print disk(0)
print disk(1)
print disk(2)
print disk(3)
print disk(4)
print disk(5)
print disk(6)
print disk(7)
print disk(8)
disk(2).partition()

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