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Message-ID: <19f34abd0808121346w60f37ac0mf8e4ed20549af0e1@mail.gmail.com> Date: Tue, 12 Aug 2008 22:46:21 +0200 From: "Vegard Nossum" <vegard.nossum@...il.com> To: "Alexey Dobriyan" <adobriyan@...il.com> Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org> Subject: Re: latest -git: kernel hangs when pulling the plug on 8139too On Tue, Aug 12, 2008 at 9:02 PM, Vegard Nossum <vegard.nossum@...il.com> wrote: > On Tue, Aug 12, 2008 at 7:20 PM, Vegard Nossum <vegard.nossum@...il.com> wrote: >> ...but after pulling the cable and seeing the keyboard blink for five >> seconds, the CPU resets without running the new kernel (i.e. it >> reboots and I see the BIOS messages, etc.). >> >> Maybe I did something wrong? (Though I don't think so.) >> >> I will try to replace some printk()s to early_printk() (allows me to >> maybe capture some messages on ttyS0 without trying to send anything >> over netconsole). > > It turns out that we're not getting as far as the "panic:" line in panic(). Actually, I just forgot earlyprintk=...,keep. Now I modified the printk() to use early_printk() if oops_in_progress is set. This does actually give some result, but again the text is garbled, this time for real, and I don't understand why. But this is what I get on the serial console: <0>BUG: NMI Watchdog detected LOCKUP on CPU1, ip c010ae8c, registers: Pid: 0, comm: swapper Not tainted (2.6.27-rc2-00325-g796aade-dirty #3) EIP: 0060:[<c010ae8c>] EFLAGS: 00000246 CPU: 1 EIP is at mwait_idle+0x3c/0x50 EAX: 00000000 EBX: f7894008 ECX: 00000000 EDX: 00000000 ESI: 00000001 EDI: c081ec00 EBP: f7895f7c ESP: f7895f78 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 <0>Process swapper (pid: 0, ti=f7894000 task=f7898000 task.ti=f7894000) <0>Stack: c1fb1c00 f7895f94 c010285c c07d0020 c1f63020 00000001 00000000 f7895fb4 <0> c058b859 00000000 00000000 00000000 00000000 01020800 00000000 00000000 <0> 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 <0>Call Trace: <0> [<c010285c>] ? cpu_idle+0x6c/0x120 <0> [<c058b859>] ? start_secondary+0x169/0x1d0 <0> ======================= <0>Code: 08 75 2b 31 c9 89 d8 89 ca 0f 01 c8 0f ae f0 66 90 89 e0 25 00 e0 ff ff f6 40 08 08 75 10 e8 dc db 04 00 31 c9 89 c8 fb 0f 01 c9 <5b> 5d c3 e8 cc db 04 00 fb 0f 1f 84 00 00 00 00 00 90 eb ec 55 <0>KUG: N panatchdnot stected: AieUP kilCPU0,intec0upt 1andlegis <4>--- Pid: --[ cmm: sre ]-r Not----nted<42.6.2INGc2-00/uio/796aaedesirty #ega dnP: 0t-wo[<c02/lin8>] .6/keS: 0/smp.96 CPUsmp_calP isnction_ay_ts0x1398/0xb0() AP: : 0,0006 : swaf796bNot taX: c0 2.6.2 EDc2-0001000796aSI: 03rty aa ED[<c000000f>] Barn_o775cow ESP:0x4f70x80 [<c0007b a>] ?0__pri: 00ymbGS+0x000 S4: 0 [<c0<3610ocess swaintk+0pid: 0x ti= 07740135d8sk= 06vpre0 t+0x2di=c077 00<c010>Sta>k: 0n0000e0 che75ca4ck+08a0b9xc077 cdc c12998d>] ? 1fb4ntk+05aeb0x3e0 [c 150> >] p0775ccfunc15623bask+00001/0x1d8ab0[<c0018060b25d8sb0 f796s_cpuf796b0x50 <0> 58b8 000 00s6 rt_75cfndar5916b69/00000 0 000010ae 0>] b 55 f6s_acti f796b/0x2 [Call 5d8de: <0> [<ck+0x2b9>] ?0__de<c010x9/5>] ? prin[<c0ace_a9>] ? +0x4_spin_ [<0xb9/859>] 0tart_0156ndb>] 0xtrac0x1d0dirq<c01f+0x0>] 10sto0> [<s_cpu6b6>/0x5_sp [<cock_12qs] e+p_call_function[<c035bx60>] [<r010a39_star _xmit_id65/0x1c/0x50> [<<c011255>>] atl8139_p_set_xmitp+0x5/0x130 [<c[<c04cc>] > wanttpoll+0x3d_skb00x1[<c011a032>]>pani04cx62/0] ? t[<c01sendc>] +0mwab/0xdle+0x0> [<50 c7<c0138aw2>] do_exix8c/0e2/0x<80 [ [<c05883>]>] __shll_cogiolers+0vers+0x30/0x6<c020> [4>] 3 do_u] la_cascreensole4/0x1ers+ [<c/ 0x9dd9<0> <c0_35a25xb9/ xf0 s[<c01sole_>] + xc5/0_idl <0> /0x00 f0b>]10avpc>] k 0x1ib/0x3e+0x30> [<c 5 [<c01] e0_>] n_e_nmik_irf/0xfore+[<c010x70 ]0> mwc0146dle+0 ? /0x50 _woc011x31/0] 0mi<0> [hdo1461e5+0x? 5/0ue_wo [<c45/0217>]<do_n<c01x97/0>] ? q [<e_dela03>]wnmi_stack_c0 rect [<c050x2b >] ? 0spin_b>] c _iratestorl_ti43/0x36b/0x> [<c [<c0d1>]8c>s hemwae_delaeed_3c/0+0x1 /0x20 028> [<ccp3615le+ x6prix1200 [<0x20 8<0> [scart9736>ndarmiix169ck_me0ia+===96/0==e0= <0> [<==== 27b>---[_end tlock+03bf506b02770> [ ]035 7<4>- ? --l_ch--[ cedia+re ]-0x30----> [<c035a0RNING? atl8139/arkirrups/s292a/0x4dno <it-wor01716linux? .6/dle_Il/smpent+06 smp_70ll_f> [<con_sinb>] 0 10a/le_f0() iiirq+, com0xe0 <0>r Tai107128G IR 2.648/0xc2-0<0> [g7968a604dirt #3ce_hac0135s_of] thunkon_s/0x18 h+0> [<cx804a c>] ?6c14a>]_in__rrupt_sy28/0x0x2a/0> [< 0150013610? ] ? vpriall_ti3e+00x3e/0x7d<c013> [<c] 0av8c>] k+mwai/0x3ee+ [c/0x500e5>> [<nat0285sched clo_k+0x+0x6c110120[ c0> ef9a>6bsmp>] llrfunctnit_sing/0x701 a0> === ==<c01======= ? =top_thiode: +0x09 x50 f0 815f0c2b d pc all_d e8 7on_mab8 01 2d/00 50 8 <a 56 e6 >] ?9st0 25his_cp ff ff f50 08c05875 17] ? s4 0c_secon <5f> xd c3 e1d00 4d 30 00 a0 a9 29 rd e8activc ff f0x20 8 [<c000 <>] ? vprintnic 2d/0t syncing:01051f kil? ng nt_trrupt hdreser!x4</0x5----[<c05-[ c9>] ?rstart----onda--+0<4>9/0xING: a[<c011/arkim desto29/vis_cdno/x0/0xorkin[<c01ux-2.6] ern_callp.c:29ion+0_30/0_fun tion010ae8cx13e 0x1it_id e+0: 0,0x50 [<c0per 5e>]tnatiG mp_seW 2.top+0x12-00705-g7<c010e-di>] ?#mwa [<cdle+53f>]0war _ [<clowp432>]xpan0x80 2[<c016 4a<c01 ae8cint_ ymbol_idla/0x40/0 [<c 135d8138a02>] intexit2d/0x2/0x8 [<c0[<c010>] c>] ristk+0regisx3e0 0 [<c0x230 e>] cmp_caa4>] n tiounblank_scre/0x1x24/ [<c0 80<c010? d9>p_this_cpmi+0x/0x5xf0 [<c05010a2>] ] ? st_it_id0x62x3c70 0 [<c022c>8c>]d? ay_tt_idlec/03b/0x [<c0[<c08d>] f>] rie_nmi+2d/0x0xf0 [<c0010ae5>] rintt_iale+0x3ress50 45[<c01 05>05nmi_2>] ? og_t_initx1d5//0x70 [<c0116217>] dostoi+0x97_cpu+0 0/0xc059 [<c015f120stasm_corre_funxti/0x2b3 /0xc0 007c028a 18>] e wally_tsc+0x36/0xb8d [ [<c0815e>c>nat ve_st_idln+0x3op+050 /0x<c010[<cc28 218>idled0x6c/tsc+0 8/0c058b [<c] 3543t_sepondc+0x62169120 [< ===a218>====delay_t====x <4>--8 endc0138e 33b 576exit+932f2/0x-80 0>Reb01054g in 3 sec_regi.ters+0x7c/0x230 [<c02ecfa4>] ? do_unblank_screen+0x24/0x130 [<c0105dd9>] ? die_nmi+0xb9/0xf0 [<c028a218>] ? delay_tsc+0x98/0xb8 [<c028a218>] ? delay_tsc+0x98/0xb8 [<c0105e0f>] die_nmi+0xef/0xf0 [<c028a218>] ? delay_tsc+0x98/0xb8 [<c0119b05>] nmi_watchdog_tick+0x1d5/0x1e0 [<c0106217>] do_nmi+0x97/0x2d0 [<c0591f03>] nmi_stack_correct+0x26/0x2b [<c028007b>] ? as_remove_queued_request+0x9b/0xb0 [<c028a218>] ? delay_tsc+0x98/0xb8 [<c028a0b9>] __delay+0x9/0x10 [<c0299579>] _raw_spin_lock+0xb9/0x140 [<c015623b>] ? trace_hardirqs_off+0xb/0x10 [<c05916b6>] _spin_lock_irqsave+0x76/0x90 [<c035b255>] ? rtl8139_start_xmit+0x65/0x130 [<c035b255>] rtl8139_start_xmit+0x65/0x130 [<c04c5e28>] netpoll_send_skb+0x158/0x1a0 [<c04c62fb>] netpoll_send_udp+0x1db/0x1f0 [<c037c70c>] write_msg+0x8c/0xc0 [<c0135883>] __call_console_drivers+0x53/0x60 [<c01358db>] _call_console_drivers+0x4b/0x90 [<c0135a25>] release_console_sem+0xc5/0x1f0 [<c0135f0b>] vprintk+0x1ab/0x3e0 [<c0591acc>] ? _spin_unlock_irqrestore+0x6c/0x70 [<c01460e1>] ? __queue_work+0x31/0x40 [<c01461e5>] ? queue_work+0x45/0x50 [<c014629f>] ? queue_delayed_work+0xf/0x30 [<c0591aa3>] ? _spin_unlock_irqrestore+0x43/0x70 [<c01462d1>] ? schedule_delayed_work+0x11/0x20 [<c013615b>] printk+0x1b/0x20 [<c0349736>] mii_check_media+0x196/0x1e0 [<c059127b>] ? _spin_lock+0x5b/0x70 [<c03597f4>] rtl_check_media+0x24/0x30 [<c035a0ea>] rtl8139_interrupt+0x42a/0x4a0 [<c01716d8>] handle_IRQ_event+0x28/0x70 [<c0172d9b>] handle_fasteoi_irq+0x6b/0xe0 [<c0107128>] do_IRQ+0x48/0xa0 [<c028a604>] ? trace_hardirqs_off_thunk+0xc/0x18 [<c0104a5c>] common_interrupt+0x28/0x30 [<c015007b>] ? update_wall_time+0x36b/0x7d0 [<c010ae8c>] ? mwait_idle+0x3c/0x50 [<c010285c>] cpu_idle+0x6c/0x120 [<c056bb32>] rest_init+0x62/0x70 ======================= <4>---[ end trace 33bf576b6277932f ]--- <4>------------[ cut here ]------------ <4>WARNING: at /uio/arkimedes/s29/vegardno/git-working/linux-2.6/kernel/smp.c:216 smp_call_function_single+0x10a/0x110() Pid: 0, comm: swapper Tainted: G W 2.6.27-rc2-00325-g796aade-dirty #3 [<c013553f>] warn_on_slowpath+0x4f/0x80 [<c016014a>] ? __print_symbol+0x2a/0x40 [<c0135d8d>] ? vprintk+0x2d/0x3e0 [<c015ef9a>] smp_call_function_single+0x10a/0x110 [<c0118060>] ? stop_this_cpu+0x0/0x50 [<c015f0cd>] smp_call_function_mask+0x12d/0x150 [<c0118060>] ? stop_this_cpu+0x0/0x50 [<c056bb32>] ? rest_init+0x62/0x70 [<c028a22c>] ? delay_tsc+0xac/0xb8 [<c0135d8d>] ? vprintk+0x2d/0x3e0 [<c01051f5>] ? print_trace_address+0x45/0x50 [<c056bb32>] ? rest_init+0x62/0x70 [<c0118060>] ? stop_this_cpu+0x0/0x50 [<c015f120>] smp_call_function+0x30/0x60 [<c028a218>] ? delay_tsc+0x98/0xb8 [<c011815e>] native_smp_send_stop+0x1e/0x70 [<c028a218>] ? delay_tsc+0x98/0xb8 [<c0135432>] panic+0x62/0x120 [<c028a218>] ? delay_tsc+0x98/0xb8 [<c0138a02>] do_exit+0x7e2/0x880 [<c01054bc>] ? show_registers+0x7c/0x230 [<c02ecfa4>] ? do_unblank_screen+0x24/0x130 [<c0105dd9>] ? die_nmi+0xb9/0xf0 [<c028a218>] ? delay_tsc+0x98/0xb8 [<c028a218>] ? delay_tsc+0x98/0xb8 [<c0105e0f>] die_nmi+0xef/0xf0 [<c028a218>] ? delay_tsc+0x98/0xb8 [<c0119b05>] nmi_watchdog_tick+0x1d5/0x1e0 [<c0106217>] do_nmi+0x97/0x2d0 [<c0591f03>] nmi_stack_correct+0x26/0x2b [<c028007b>] ? as_remove_queued_request+0x9b/0xb0 [<c028a218>] ? delay_tsc+0x98/0xb8 [<c028a0b9>] __delay+0x9/0x10 [<c0299579>] _raw_spin_lock+0xb9/0x140 [<c015623b>] ? trace_hardirqs_off+0xb/0x10 [<c05916b6>] _spin_lock_irqsave+0x76/0x90 [<c035b255>] ? rtl8139_start_xmit+0x65/0x130 [<c035b255>] rtl8139_start_xmit+0x65/0x130 [<c04c5e28>] netpoll_send_skb+0x158/0x1a0 [<c04c62fb>] netpoll_send_udp+0x1db/0x1f0 [<c037c70c>] write_msg+0x8c/0xc0 [<c0135883>] __call_console_drivers+0x53/0x60 [<c01358db>] _call_console_drivers+0x4b/0x90 [<c0135a25>] release_console_sem+0xc5/0x1f0 [<c0135f0b>] vprintk+0x1ab/0x3e0 [<c0591acc>] ? _spin_unlock_irqrestore+0x6c/0x70 [<c01460e1>] ? __queue_work+0x31/0x40 [<c01461e5>] ? queue_work+0x45/0x50 [<c014629f>] ? queue_delayed_work+0xf/0x30 [<c0591aa3>] ? _spin_unlock_irqrestore+0x43/0x70 [<c01462d1>] ? schedule_delayed_work+0x11/0x20 [<c013615b>] printk+0x1b/0x20 [<c0349736>] mii_check_media+0x196/0x1e0 [<c059127b>] ? _spin_lock+0x5b/0x70 [<c03597f4>] rtl_check_media+0x24/0x30 [<c035a0ea>] rtl8139_interrupt+0x42a/0x4a0 [<c01716d8>] handle_IRQ_event+0x28/0x70 [<c0172d9b>] handle_fasteoi_irq+0x6b/0xe0 [<c0107128>] do_IRQ+0x48/0xa0 [<c028a604>] ? trace_hardirqs_off_thunk+0xc/0x18 [<c0104a5c>] common_interrupt+0x28/0x30 [<c015007b>] ? update_wall_time+0x36b/0x7d0 [<c010ae8c>] ? mwait_idle+0x3c/0x50 [<c010285c>] cpu_idle+0x6c/0x120 [<c056bb32>] rest_init+0x62/0x70 ======================= <4>---[ end trace 33bf576b6277932f ]--- ...this seems to contain at least a little bit of useful information. Looks to me like it's quite simply a recursive printk. I don't understand why the printk code doesn't catch this, though. Any ideas? Vegard -- "The animistic metaphor of the bug that maliciously sneaked in while the programmer was not looking is intellectually dishonest as it disguises that the error is the programmer's own creation." -- E. W. Dijkstra, EWD1036 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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