Messages in this thread | | | Date | Mon, 24 Dec 2001 20:48:36 +0100 | From | Frank van Maarseveen <> | Subject | <=2.4.17 deadlock (RedHat 7.2, SMP, ext3 related?) (2) |
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Below a second case, again it occured right at the moment a PPP connection was terminated. For some unknown reason it seems to occur frequently enough now for doing some experimenting. Tell me if more info is needed. This is the same kernel as before. When the problem first emerged some weeks ago after installing RedHat 7.2 I switched to kgcc (gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) instead of gcc 2.96 but it didn't make a difference.
Following two alt-sysrq-p have been decoded from a JPEG image I took from the screen. Even alt-sysrq-l leaves most processes intact according to alt-sysrq-t so to me it looks like a genuine deadlock:
Pid: 4465, comm: hotplug EIP: 0010:[<c03fe0ba>] CPU: 0 EFLAGS 00000286 not tainted Call Trace: c0140134 c013eba2 c013eab2 c013ee23 c01076cb
Pid: 2930, comm: pppd EIP: 0010:[<c0403068>] CPU: 1 EFLAGS 00000286 not tainted Call Trace: c016d320 c028ee04 c0159e01 c0156e68 c013f063 c0150bc6 c028eac8 c01076cb
Now ksymoops at work: 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:[<c03fe0ba>] CPU: 0 EFLAGS 00000286 not tainted Using defaults from ksymoops -t elf32-i386 -a i386 Call Trace: c0140134 c013eba2 c013eab2 c013ee23 c01076cb EIP: 0010:[<c0403068>] CPU: 1 EFLAGS 00000286 not tainted Call Trace: c016d320 c028ee04 c0159e01 c0156e68 c013f063 c0150bc6 c028eac8 c01076cb Warning (Oops_read): Code line not seen, dumping what data is available
>>EIP; c03fe0ba <stext_lock+1c82/e9ac> <===== Trace; c0140134 <chrdev_open+28/124> Trace; c013eba2 <dentry_open+e6/194> Trace; c013eab2 <filp_open+52/5c> Trace; c013ee23 <sys_open+4b/140> Trace; c01076cb <system_call+33/38> >>EIP; c0403068 <stext_lock+6c30/e9ac> <===== Trace; c016d320 <ext3_delete_inode+0/270> Trace; c028ee04 <ppp_ioctl+33c/d84> Trace; c0159e01 <iput+2c5/2f0> Trace; c0156e68 <d_delete+dc/20c> Trace; c013f063 <filp_close+133/140> Trace; c0150bc6 <sys_ioctl+24a/2e4> Trace; c028eac8 <ppp_ioctl+0/d84> Trace; c01076cb <system_call+33/38>
3 warnings issued. Results may not be reliable.
-- Frank - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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