On Tuesday 03 May 2005 18:32, Anthony Brock wrote: > Well, debug information didn't seem to have any positive effect. Here are > the additional configure parameters I turned on: > > CONFIG_DEBUG_KERNEL=y > CONFIG_DEBUG_INFO=y > CONFIG_FRAME_POINTER=y > > Let me know if I'm missing something or need to turn on additional > parameters. Those options will improve the kernel backtrace you get with an additional patch I'll merge shortly. For now, they only (should) improve the output of GDB's "backtrace".
> Also, please note that this crash never seemed to end! It kept > hitting breakpoints! Here are the start of the messages: No, they're not breakpoints, it's more like some bug causes it to enter singlestepping. It's the 3rd time in a few days this bug is reported. > myserver:~# > Program received signal SIGSEGV, Segmentation fault. > 0x0806b21f in chan_interrupt () > (gdb) bt > #0 0x0806b21f in chan_interrupt () > #1 0x00000000 in ?? () > (gdb) c > Continuing. > > Breakpoint 1, 0x0807d0c0 in panic () > (gdb) bt > #0 0x0807d0c0 in panic () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0807d0c4 in panic () > (gdb) bt > #0 0x0807d0c4 in panic () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0807d0cb in panic () > (gdb) bt > #0 0x0807d0cb in panic () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0818fdd0 in bust_spinlocks () > (gdb) bt > #0 0x0818fdd0 in bust_spinlocks () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0818fdd3 in bust_spinlocks () > (gdb) bt > #0 0x0818fdd3 in bust_spinlocks () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0818fdd7 in bust_spinlocks () > (gdb) bt > #0 0x0818fdd7 in bust_spinlocks () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0818fddb in bust_spinlocks () > (gdb) bt > #0 0x0818fddb in bust_spinlocks () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0818fddd in bust_spinlocks () > (gdb) bt > #0 0x0818fddd in bust_spinlocks () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0818fddf in bust_spinlocks () > (gdb) bt > #0 0x0818fddf in bust_spinlocks () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0818fde4 in bust_spinlocks () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0818fdea in bust_spinlocks () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0818fdee in bust_spinlocks () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0818fdf1 in bust_spinlocks () > (gdb) c > Continuing. > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x0807d0d0 in panic () > (gdb) > > > I eventually killed the process. It never actually reached the previous > error message. Also, this crash occurred a few seconds after I had finished > typing my last command (ls -l /etc/network/). > > Tony > > >>> "Anthony Brock" <[EMAIL PROTECTED]> 05/03/05 08:16AM >>> > > Hmmm, I think I need to recompile the kernel with debug information. In any > case, here are the results: > > myserver:~# > Program received signal SIGSEGV, Segmentation fault. > 0x0806b21f in chan_interrupt () > (gdb) bt > #0 0x0806b21f in chan_interrupt () > #1 0x00000000 in ?? () > (gdb) c > Continuing. > Kernel panic - not syncing: Kernel mode fault at addr 0xd, ip 0x0 > > EIP: 0000:[<00000000>] CPU: 0 Not tainted EFLAGS: 00000000 > Not tainted > EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000 > ESI: 00000000 EDI: 00000000 EBP: 00000000 DS: 0000 ES: 0000 > Call Trace: > 08297338: [<0808c30d>] notifier_call_chain+0x2d/0x50 > 08297348: [<0818fe16>] bust_spinlocks+0x46/0x50 > 08297358: [<0807d131>] panic+0x71/0x120 > 08297378: [<08066997>] segv+0x217/0x250 > 082973d8: [<08064eb5>] change_signals+0x65/0x90 > 08297468: [<08066cb7>] segv_handler+0xd7/0xe0 > 08297488: [<080697f0>] sig_handler_common_skas+0x90/0xe0 > 082974b8: [<08075e87>] sig_handler+0x17/0x20 > 08297508: [<0806b21f>] chan_interrupt+0xf/0x130 > 08297530: [<08064f70>] enable_mask+0x50/0x70 > 08297550: [<08064fc3>] get_signals+0x33/0x50 > 082975b0: [<0806505d>] set_signals+0x7d/0x130 > 08297620: [<0806505d>] set_signals+0x7d/0x130 > 082976b0: [<0806505d>] set_signals+0x7d/0x130 > 08297710: [<0806505d>] set_signals+0x7d/0x130 > 08297740: [<08064eb5>] change_signals+0x65/0x90 > 082977d0: [<0806b85f>] line_interrupt+0x2f/0x40 > 082977f0: [<08099900>] handle_IRQ_event+0x30/0x80 > 08297820: [<080999f8>] __do_IRQ+0xa8/0xf0 > 08297840: [<0805fea3>] do_IRQ+0x33/0x50 > 08297850: [<0806004a>] sigio_handler+0xda/0x140 > 08297870: [<080697f0>] sig_handler_common_skas+0x90/0xe0 > 08297894: [<080690e0>] start_kernel_proc+0x0/0x40 > 0829789c: [<08068cc0>] new_thread_handler+0x0/0x120 > 082978a0: [<08075e87>] sig_handler+0x17/0x20 > 082978cc: [<080690e0>] start_kernel_proc+0x0/0x40 > 082978d0: [<08068cc0>] new_thread_handler+0x0/0x120 > 08297a40: [<08068937>] switch_threads+0x87/0x90 > 08297a70: [<08064eb5>] change_signals+0x65/0x90 > 08297b10: [<08064f0f>] unblock_signals+0xf/0x20 > 08297b20: [<080799e7>] finish_task_switch+0x27/0x70 > 08297b40: [<08244353>] schedule+0x2e3/0x4e0 > 08297b90: [<08065e93>] idle_sleep+0x23/0x30 > 08297bac: [<08068cc0>] new_thread_handler+0x0/0x120 > 08297bb0: [<08062f37>] default_idle+0x67/0x70 > 08297bd0: [<080690d8>] init_idle_skas+0x28/0x30 > 08297bd4: [<0805f210>] init+0x0/0x110 > 08297be0: [<080495b3>] start_kernel+0x163/0x1a0 > 08297bf4: [<08049130>] unknown_bootoption+0x0/0x200 > 08297c00: [<0806910b>] start_kernel_proc+0x2b/0x40 > 08297c04: [<080690e0>] start_kernel_proc+0x0/0x40 > 08297c10: [<08062978>] run_kernel_thread+0x78/0x80 > 08297c28: [<080690e0>] start_kernel_proc+0x0/0x40 > 08297c30: [<08068cc0>] new_thread_handler+0x0/0x120 > 08297c38: [<08062940>] run_kernel_thread+0x40/0x80 > 08297cd4: [<080690e0>] start_kernel_proc+0x0/0x40 > 08297cdc: [<08068cc0>] new_thread_handler+0x0/0x120 > 08297ce0: [<08068d8e>] new_thread_handler+0xce/0x120 > 08297ce4: [<080690e0>] start_kernel_proc+0x0/0x40 > 08297d40: [<08068cc0>] new_thread_handler+0x0/0x120 > > > > Program exited with code 01. > (gdb) > > >>> Jeff Dike <[EMAIL PROTECTED]> 05/02/05 08:13PM >>> > > [EMAIL PROTECTED] said: > > Is this your "stack trace"? > > Close. What I'd really like is to get it to crash when it's running under > gdb, with a breakpoint on panic. Then, 'bt' to gdb at that point. > > That gives the true call trace, plus line number information. > > > 08297488: [<080697f0>] sig_handler_common_skas+0x90/0xe0 > > 082974b8: [<08075e87>] sig_handler+0x17/0x20 > > 08297508: [<0806b21f>] chan_interrupt+0xf/0x130 > > 08297530: [<08064f70>] enable_mask+0x50/0x70 > > This tells me that chan_interrupt segfaulted, but not necessarily exactly > where, and a lot of the other stuff on the stack isn't in the true call > chain. > > Jeff > > > > ------------------------------------------------------- > This SF.Net email is sponsored by: NEC IT Guy Games. > Get your fingers limbered up and give it your best shot. 4 great events, 4 > opportunities to win big! Highest score wins.NEC IT Guy Games. Play to > win an NEC 61 plasma display. Visit http://www.necitguy.com/?r=20 > _______________________________________________ > User-mode-linux-devel mailing list > User-mode-linux-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel > > > ------------------------------------------------------- > This SF.Net email is sponsored by: NEC IT Guy Games. > Get your fingers limbered up and give it your best shot. 4 great events, 4 > opportunities to win big! Highest score wins.NEC IT Guy Games. Play to > win an NEC 61 plasma display. Visit http://www.necitguy.com/?r > _______________________________________________ > User-mode-linux-devel mailing list > User-mode-linux-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel > > > ------------------------------------------------------- > This SF.Net email is sponsored by: NEC IT Guy Games. > Get your fingers limbered up and give it your best shot. 4 great events, 4 > opportunities to win big! Highest score wins.NEC IT Guy Games. Play to > win an NEC 61 plasma display. Visit http://www.necitguy.com/?r > _______________________________________________ > User-mode-linux-devel mailing list > User-mode-linux-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel -- Paolo Giarrusso, aka Blaisorblade Skype user "PaoloGiarrusso" Linux registered user n. 292729 http://www.user-mode-linux.org/~blaisorblade ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. Get your fingers limbered up and give it your best shot. 4 great events, 4 opportunities to win big! Highest score wins.NEC IT Guy Games. Play to win an NEC 61 plasma display. Visit http://www.necitguy.com/?r=20 _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
