Re: [PATCH 7/7] CPU controller V1 - (temporary) cpuset interface

Mike Galbraith
2006-08-23T13:16:11Z

On Wed, 2006-08-23 at 09:43 +0000, Mike Galbraith wrote:

> ...and after my box finishes rebooting, I'll alert the developer of this
> patch set that very bad things happen the instant you do that :)

Good news is that it doesn't always spontaneous reboot. Sometimes, it
just goes pop.

(gdb) list *schedule+0x18a
0xb13c4aba is in schedule (kernel/sched.c:3586).
3581 #else
3582 next_grp = init_task_grp.rq[cpu];
3583 #endif
3584
3585 /* Pick a task within that group next */
3586 array = next_grp->active;
3587 if (!array->nr_active) {
3588 /*
3589 * Switch the active and expired arrays.
3590 */
(gdb)

BUG: unable to handle kernel paging request at virtual address ffffffe8
printing eip:
b13c4aba
*pde = 00004067
Oops: 0000 [#1]
PREEMPT SMP
Modules linked in: xt_pkttype ipt_LOG xt_limit eeprom snd_pcm_oss snd_mixer_oss snd_seq_midi snd_seq_midi_event snd_seq edd ip6t_REJECT xt_tcpudp ipt_REJECT xt_state iptable_mangle iptable_nat ip_nat iptable_filter ip6table_mangle ip_conntrack nfnetlink ip_tables ip6table_filter ip6_tables x_tables nls_iso8859_1 nls_cp437 nls_utf8 tuner snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_pcm snd_timer snd_page_alloc saa7134 prism54 bt878 ir_kbd_i2c snd_mpu401 snd_mpu401_uart snd_rawmidi snd_seq_device snd i2c_i801 bttv ohci1394 ieee1394 video_buf ir_common btcx_risc tveeprom soundcore sd_mod
CPU: 0
EIP: 0060:[<b13c4aba>] Not tainted VLI
EFLAGS: 00210097 (2.6.18-rc4-ctrl #166)
EIP is at schedule+0x18a/0xb5b
eax: 0000008c ebx: b1488f40 ecx: b1e65f60 edx: fffff6e8
esi: b1489054 edi: b15ce300 ebp: b158efac esp: b158ef38
ds: 007b es: 007b ss: 0068
Process swapper (pid: 0, ti=b158e000 task=b1488f40 task.ti=b158e000)
Stack: 00000000 00200046 b158ef3c b1488f40 00000000 00000000 b158ef78 b15ce380
b15ce300 b158ef64 b1027f51 00000001 b1488f40 00000000 008961d3 00000035
0005466d 00000000 b1489054 b1e65f60 b15ce300 b158efac 00000000 b1e6007b
Call Trace:
[<b1001a52>] cpu_idle+0x8f/0xc9
[<b1000622>] rest_init+0x39/0x47
[<b15957c8>] start_kernel+0x34d/0x405
[<b1000210>] 0xb1000210
DWARF2 unwinder stuck at 0xb1000210
Leftover inexact backtrace:
=======================
=======================
BUG: unable to handle kernel paging request at virtual address 38f28034
printing eip:
b1004074
*pde = 00000000
Oops: 0000 [#2]
PREEMPT SMP
Modules linked in: xt_pkttype ipt_LOG xt_limit eeprom snd_pcm_oss snd_mixer_oss snd_seq_midi snd_seq_midi_event snd_seq edd ip6t_REJECT xt_tcpudp ipt_REJECT xt_state iptable_mangle iptable_nat ip_nat iptable_filter ip6table_mangle ip_conntrack nfnetlink ip_tables ip6table_filter ip6_tables x_tables nls_iso8859_1 nls_cp437 nls_utf8 tuner snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_pcm snd_timer snd_page_alloc saa7134 prism54 bt878 ir_kbd_i2c snd_mpu401 snd_mpu401_uart snd_rawmidi snd_seq_device snd i2c_i801 bttv ohci1394 ieee1394 video_buf ir_common btcx_risc tveeprom soundcore sd_mod
CPU: 0
EIP: 0060:[<b1004074>] Not tainted VLI
EFLAGS: 00210812 (2.6.18-rc4-ctrl #166)
EIP is at show_trace_log_lvl+0x92/0x191
eax: 38f28ffd ebx: 38f289c9 ecx: ffffffff edx: 00200006
esi: b158ee1c edi: 38f28000 ebp: b158ee1c esp: b158edc8
ds: 007b es: 007b ss: 0068
Process swapper (pid: 0, ti=b158e000 task=b1488f40 task.ti=b158e000)
Stack: b1407cc4 b1407d3c 00020809 b1e65f60 fffff6e8 00099100 b1500800 01675007
0000008c 0020007b 0000007b ffffffff b1000210 00000060 00210097 b158f000
00000068 b1488f40 b158ef9b 00000018 b1407d3c b158ee44 b1004219 b1407d3c
Call Trace:
[<b1004219>] show_stack_log_lvl+0xa6/0xcb
[<b10043e7>] show_registers+0x1a9/0x22e
[<b10045a2>] die+0x136/0x2ea
[<b10191cb>] do_page_fault+0x269/0x529
[<b1003bb1>] error_code+0x39/0x40
[<b13c4aba>] schedule+0x18a/0xb5b
[<b1001a52>] cpu_idle+0x8f/0xc9
[<b1000622>] rest_init+0x39/0x47
[<b15957c8>] start_kernel+0x34d/0x405
[<b1000210>] 0xb1000210
DWARF2 unwinder stuck at 0xb1000210
Leftover inexact backtrace:
=======================
=======================
BUG: unable to handle kernel paging request at virtual address 38f28034
printing eip:
b1004074
*pde = 00000000
Recursive die() failure, output suppressed