Messages in this thread | | | Date | Sun, 23 Dec 2001 23:53:15 +0100 | From | Frank van Maarseveen <> | Subject | <=2.4.17 deadlock (RedHat 7.2, SMP) |
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The problem occurs only when I disconnect a PPP dialup to an ISP. It results in a box which only listens to alt-sysrq or a power cycle. The userland setup is a bit complicated (two pppd instances, a zebra routing daemon) but below there should be a clue about the cause. This is all on a RedHat 7.2 distro running on a dual PIII box. My brain decoded the following JPEG picture I took from the screen after typing alt-sysrq-p 3 times:
Pid: 5613, comm pppd EIP: 0010: [<c0403068>] CPU: 1 EFLAGS 00000286 not tainted Call Trace: c0273cae c028ee04 c0293ac8 c0155879 c013f063 c0150bc6 c028eac8 c01076cb
Pid: 5613, comm pppd EIP: 0010: [<c040306f>] CPU: 1 EFLAGS 00000286 not tainted Call Trace: c0273cae c028ee04 c0293ac8 c0155879 c013f063 c0150bc6 c028eac8 c01076cb
Pid: 18, comm kjournald EIP: 0010: [<c03fca5b>] CPU: 0 EFLAGS 00000286 not tainted Call Trace: c02ad897 c011f1ea c0140af5 c0179dde c011560c c017ca4d c017c7e0 c010590f
cat /proc/version says: Linux version 2.4.17-b65 (fvm@iapetus.localdomain) (gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) #1 SMP Sun Dec 23 22:16:27 CET 2001
ksymoops says: ksymoops 2.4.1 on i686 2.4.17-b65. Options used -V (default) -k /proc/ksyms (default) -l /proc/modules (default) -o /lib/modules/2.4.17-b65/ (default) -m /boot/System.map-2.4.17-b65 (default)
Warning: You did not tell me where to find symbol information. I will assume that the log matches the kernel and modules that are running right now and I'll use the default options above for symbol resolution. If the current kernel and/or modules do not match the log, you can get more accurate output by telling me the kernel version and where to find map, modules, ksyms etc. ksymoops -h explains the options.
No modules in ksyms, skipping objects Warning (read_lsmod): no symbols in lsmod, is /proc/modules a valid lsmod file? EIP: 0010: [<c0403068>] CPU: 1 EFLAGS 00000286 not tainted Using defaults from ksymoops -t elf32-i386 -a i386 Call Trace: c0273cae c028ee04 c0293ac8 c0155879 c013f063 c0150bc6 c028eac8 c01076cb EIP: 0010: [<c040306f>] CPU: 1 EFLAGS 00000286 not tainted Call Trace: c0273cae c028ee04 c0293ac8 c0155879 c013f063 c0150bc6 c028eac8 c01076cb EIP: 0010: [<c03fca5b>] CPU: 0 EFLAGS 00000286 not tainted Call Trace: c02ad897 c011f1ea c0140af5 c0179dde c011560c c017ca4d c017c7e0 c010590f Warning (Oops_read): Code line not seen, dumping what data is available
>>EIP; c0403068 <stext_lock+6c30/e9ac> <===== Trace; c0273cae <rs_wait_until_sent+b6/c4> Trace; c028ee04 <ppp_ioctl+33c/d84> Trace; c0293ac8 <ppp_destroy_channel+1bc/1c4> Trace; c0155879 <dput+19/214> Trace; c013f063 <filp_close+133/140> >>EIP; c040306f <stext_lock+6c37/e9ac> <===== Trace; c0273cae <rs_wait_until_sent+b6/c4> Trace; c028ee04 <ppp_ioctl+33c/d84> Trace; c0293ac8 <ppp_destroy_channel+1bc/1c4> Trace; c0155879 <dput+19/214> Trace; c013f063 <filp_close+133/140> >>EIP; c03fca5b <stext_lock+623/e9ac> <===== Trace; c02ad897 <do_ide_request+f/14> Trace; c011f1ea <__run_task_queue+d2/e0> Trace; c0140af5 <__wait_on_buffer+55/9c> Trace; c0179dde <journal_commit_transaction+114a/181c> Trace; c011560c <schedule+640/818>
3 warnings issued. Results may not be reliable.
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