On Mon, May 06, 2002 at 02:37:36PM -0700, Peter Jay Salzman wrote: > begin Henry House <[EMAIL PROTECTED]> > > On Mon, May 06, 2002 at 01:16:35PM -0700, Mark K. Kim wrote: > > > On Mon, 6 May 2002, Henry House wrote: > > > > The Linux box that uses the printer has been up for months. But the lp > > drivers are modules; perhaps that has something do do with it? I tried to > > rmmod lp and rmmod segfaulted. It refuses to unload parport_pc (device or > > resource busy). Here is the output of lsmod: > > > > Module Size Used by Not tainted > > nls_iso8859-1 2880 0 (autoclean) > > isofs 17376 0 (autoclean) > > loop 8624 0 (autoclean) > > ide-probe-mod 7728 0 (autoclean) > > ide-mod 63528 0 (autoclean) [ide-probe-mod] > > soundcore 3908 0 (autoclean) > > appletalk 22828 0 (autoclean) > > nls_cp437 4384 0 (autoclean) > > vfat 9372 0 (autoclean) > > fat 30008 0 (autoclean) [vfat] > > floppy 45952 0 (autoclean) > > nfsd 65600 32 (autoclean) > > lockd 47168 1 (autoclean) [nfsd] > > sunrpc 63764 1 (autoclean) [nfsd lockd] > > parport_pc 25320 1 (autoclean) > > lp 0 0 (deleted) > > parport 25888 1 (autoclean) [parport_pc lp] > > af_packet 9288 1 (autoclean) > > serial 45504 1 (autoclean) > > unix 15620 122 (autoclean) > > > > Disturbing. > > not really. if another user space program accesses the printer device > file, the module will fail to unload. try "fuser /dev/lp0". > > however, the SEGFAULT is troubling. you may want to up the kernel.
I forgot to mention that I checked for processes using /dev/lp0 with lsof
May 6 14:24:22 wotan kernel: esi: 00000001 edi: f88a6000 ebp: bfffe9ac
esp: c60fff64
May 6 14:24:22 wotan kernel: ds: 0018 es: 0018 ss: 0018
May 6 14:24:22 wotan kernel: Process rmmod (pid: 29043, stackpage=c60ff000)
May 6 14:24:22 wotan kernel: Stack: f7935280 f88a7784 f88a6e95 f88a7700
f889e2c6 f7935280 f88a6000 fffffff0
May 6 14:24:22 wotan kernel: f88a70f8 f88a7784 f88a6000 fffffff0
c011a837 f88a6000 fffffff0 dcffd000
May 6 14:24:22 wotan kernel: bfffe9ac c0119b0a f88a6000 00000000
c60fe000 00000001 bfffe9ac c0106cdb
May 6 14:24:22 wotan kernel: Call Trace: [<f88a7784>] [<f88a6e95>]
[<f88a7700>] [<f889e2c6>] [<f88a70f8>]
May 6 14:24:22 wotan kernel: [<f88a7784>] [free_module+23/172]
[sys_delete_module+294/568] [system_call+51/56]
May 6 14:24:22 wotan kernel:
May 6 14:24:22 wotan kernel: Code: 8b 42 28 85 c0 74 0c 39 d8 75 f3 8b 40 28
89 42 28 31 f6 83
Does anyone follow the kernel mailing lists? I have found the search tools
next to useless, since they return matches from 1996 when I search for lp
driver problems. I'm very reluctant to re-boot the machine unless I know that
there is a fix for the problem in a newer kernel since this machine is used
interactively by people who don't like it when their processes dissappear ;-).
--
Henry House
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