(also posted to linux-kernel :: the first error message is from scsi, so posting to scsi as well.) PROBLEM: spinlock errors and system dies on 2.6.39 when I plug in my Kingston Data Traveller USB mass storage device. On 2.6.39 (built from source using GCC 4.5.3), when I insert the stick, the kernel displays BUG reports to the console and the system becomes unavailable. I managed to gather to relevant console messages from a serial console, attached below. I noticed one thing: I have console timestamping enabled. The bug always happens with this enabled.But if I turn off the console timestamping with printk.time=0, it very occasionally does not happen (scsi device comes up as expected). So it may be a timing problem. The bug never happens on 2.6.38.4 console messages: (I had to paste some information as the serial console garbled some pieces of some lines - some addresses and offsets may be incorrect but the sequence is correct) [ 174.192721] scsi 2:0:0:0: Direct-Access Kingston DataTraveler G3 1.00 PQ: 0 ANSI: 2[ 174.210226] scsi: killing requests for dead queue[ 174.212068] BUG: spinlock already unlocked on CPU#0, ksoftirqd/0/3[ 174.212068] lock: f55dc5e8, .magic: dead4ead, .owner: /-1, .owner_cpu: -1[ 174.212068] Pid: 3, comm: ksoftirqd/0 Not tainted 2.6.39-vnla #1[ 174.212068] Call Trace:[ 174.212068] [] ? do_raw_spin_lock+0x75/0x170[ 174.212068] [] ? scsi_kill_request.clone.13+0x59/0xb0[ 174.212068] [] ? scsi_request_fn+0x30c/0x380[ 174.212068] [] ? scsi_request_fn+0x84/0x380[ 174.212068] [] ? blk_run_queue+0x28/0x40[ 174.212068] [] ? scsi_run_queue+0xb1/0x230[ 174.212068] [] ? scsi_next_command+0x30/0x50[ 174.212068] [] ? scsi_io_completion+0x148/0x550[ 174.212068] [] ? blk_done_softirq+0x52/0x60[ 174.212068] [[ 174.212068] [] ? __wake_up_common+0x47/0x70[ 174.212068] [] ? run_ksoftirqd+0xa7/0x130[ 174.212068] [] ? __do_softirq+0xf0/0xf0[ 174.212068] [] ? kthread+0x74/0x80[ 174.212068] [] ? __init_kthread_worker+0x30/0x30[ 174.212068] [] ? kernel_thread_helper+0x6/0xd[ 174.212068] BUG: spinlock lockup on CPU#0, ksoftirqd/0/3, f55dc5e8[ 174.212068] Pid: 3, comm: ksoftirqd/0 Not tainted 2.6.39-vnla #1[ 174.212068] Call Trace:[ 174.212068] [] ? do_raw_spin_lock+0x157/0x170[ 174.212068] [] ? scsi_kill_request.clone.13+0x88/0xb0[ 174.212068] [] ? scsi_request_fn+0x30c/0x380[ 174.212068] [] ? scsi_request_fn+0x84/0x380[ 174.212068] [] ? blk_run_queue+0x28/0x40[ 174.212068] [] ? scsi_run_queue+0xb1/0x230[ 174.212068] [] ? scsi_next_command+0x30/0x50[ 174.212068] [] ? scsi_io_completion+0x148/0x550[ 174.212068] [] ? blk_done_softirq+0x52/0x60[ 174.212068] [] ? __do_softirq+0x75/0xf0[ 174.212068] [] ? __wake_up_common+0x47/0x70[ 174.212068] [] ? run_ksoftirqd+0xa7/0x130[ 174.212068] [] ? __do_softirq+0xf0/0xf0[ 174.212068] [] ? kthread+0x74/0x80[ 174.212068] [] ? __init_kthread_worker+0x30/0x30[ 174.212068] [] ? kernel_thread_helper+0x6/0xd ver_linux output:(note --- the 4 CPUs are 2 cores each with SMT enabled)(note -- relevant scsi and usb mass-stg drivers are builtin) Linux lumbyont.localdomain 2.6.39-vnla #1 SMP Tue May 31 13:55:29 EDT 2011 i686 GNU/Linux Gnu C 4.5.3Gnu make 3.81binutils 2.21util-linux 2.13-pre7mount supportmodule-init-tools 3.3-pre1e2fsprogs 1.41.13pcmciautils 014quota-tools 3.13.PPP 2.4.4isdn4k-utils 3.9Linux C Library 2.11.1Dynamic linker (ldd) 2.11.1Procps 3.2.7Net-tools 1.60Kbd 1.12oprofile 0.9.7gitSh-utils 8.9udev 095wireless-tools 29Modules Loaded snd_hda_intel snd_hda_codec rtc_cmos rtc_core rtc_lib bridge stp llc i915 drm_kms_helper intel_agp intel_gtt tun xt_state ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 dm_mod parport_pc lp parport============ /proc/cpuinfo =============processor : 0vendor_id : GenuineIntelcpu family : 6model : 28model name : Intel(R) Atom(TM) CPU 330 @ 1.60GHzstepping : 2cpu MHz : 1596.167cache size : 512 KBphysical id : 0siblings : 4core id : 0cpu cores : 2apicid : 0initial apicid : 0fdiv_bug : nohlt_bug : nof00f_bug : nocoma_bug : nofpu : yesfpu_exception : yescpuid level : 10wp : yesflags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3 cx16 xtpr pdcm movbe lahf_lm dtsbogomips : 3192.33clflush size : 64cache_alignment : 64address sizes : 32 bits physical, 48 bits virtualpower management: processor : 1vendor_id : GenuineIntelcpu family : 6model : 28model name : Intel(R) Atom(TM) CPU 330 @ 1.60GHzstepping : 2cpu MHz : 1596.167cache size : 512 KBphysical id : 0siblings : 4core id : 1cpu cores : 2apicid : 2initial apicid : 2fdiv_bug : nohlt_bug : nof00f_bug : nocoma_bug : nofpu : yesfpu_exception : yescpuid level : 10wp : yesflags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3 cx16 xtpr pdcm movbe lahf_lm dtsbogomips : 3191.98clflush size : 64cache_alignment : 64address sizes : 32 bits physical, 48 bits virtualpower management: processor : 2vendor_id : GenuineIntelcpu family : 6model : 28model name : Intel(R) Atom(TM) CPU 330 @ 1.60GHzstepping : 2cpu MHz : 1596.167cache size : 512 KBphysical id : 0siblings : 4core id : 0cpu cores : 2apicid : 1initial apicid : 1fdiv_bug : nohlt_bug : nof00f_bug : nocoma_bug : nofpu : yesfpu_exception : yescpuid level : 10wp : yesflags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3 cx16 xtpr pdcm movbe lahf_lm dtsbogomips : 3191.95clflush size : 64cache_alignment : 64address sizes : 32 bits physical, 48 bits virtualpower management: processor : 3vendor_id : GenuineIntelcpu family : 6model : 28model name : Intel(R) Atom(TM) CPU 330 @ 1.60GHzstepping : 2cpu MHz : 1596.167cache size : 512 KBphysical id : 0siblings : 4core id : 1cpu cores : 2apicid : 3initial apicid : 3fdiv_bug : nohlt_bug : nof00f_bug : nocoma_bug : nofpu : yesfpu_exception : yescpuid level : 10wp : yesflags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3 cx16 xtpr pdcm movbe lahf_lm dtsbogomips : 3191.85clflush size : 64cache_alignment : 64address sizes : 32 bits physical, 48 bits virtualpower management: ============ /proc/modules =============snd_hda_intel 17288 0 - Live 0xf81e5000snd_hda_codec 49964 1 snd_hda_intel, Live 0xf81ca000rtc_cmos 6500 0 - Live 0xf8151000rtc_core 13963 1 rtc_cmos, Live 0xf814b000rtc_lib 1765 1 rtc_core, Live 0xf80d0000bridge 56404 0 - Live 0xf80b9000stp 1136 1 bridge, Live 0xf80b3000llc 2864 2 bridge,stp, Live 0xf8005000i915 297997 1 - Live 0xf80e5000drm_kms_helper 24000 1 i915, Live 0xf80d8000intel_agp 8367 1 i915, Live 0xf8c10000intel_gtt 11161 3 i915,intel_agp, Live 0xf8bd7000tun 12525 1 - Live 0xf8b98000xt_state 867 26 - Live 0xf8b44000ipt_MASQUERADE 1358 1 - Live 0xf8ae6000iptable_nat 3543 1 - Live 0xf8aa6000nf_nat 11151 2 ipt_MASQUERADE,iptable_nat, Live 0xf8a3a000nf_conntrack_ipv4 8405 29 iptable_nat,nf_nat, Live 0xf8910000nf_conntrack 40997 5 xt_state,ipt_MASQUERADE,iptable_nat,nf_nat,nf_conntrack_ipv4, Live 0xf8868000nf_defrag_ipv4 887 1 nf_conntrack_ipv4, Live 0xf8696000dm_mod 52766 0 - Live 0xf8350000parport_pc 17355 1 - Live 0xf81de000lp 6716 0 - Live 0xf802b000parport 24631 2 parport_pc,lp, Live 0xf8159000============ /proc/ioports =============0000-0cf7 : PCI Bus 0000:000000-001f : dma10020-0021 : pic10040-0043 : timer00050-0053 : timer10060-0060 : keyboard0064-0064 : keyboard0070-0071 : rtc00080-008f : dma page reg00a0-00a1 : pic200c0-00df : dma200f0-00ff : fpu0170-0177 : 0000:00:1f.10170-0177 : piix01f0-01f7 : 0000:00:1f.101f0-01f7 : piix0376-0376 : 0000:00:1f.10376-0376 : piix0378-037a : parport0037b-037f : parport003c0-03df : vga+03f6-03f6 : 0000:00:1f.103f6-03f6 : piix03f8-03ff : serial0400-047f : pnp 00:060400-0403 : ACPI PM1a_EVT_BLK0404-0405 : ACPI PM1a_CNT_BLK0408-040b : ACPI PM_TMR0410-0415 : ACPI CPU throttle0420-0420 : ACPI PM2_CNT_BLK0428-042f : ACPI GPE0_BLK0500-053f : pnp 00:060680-06ff : pnp 00:060cf8-0cff : PCI conf10d00-ffff : PCI Bus 0000:001000-1fff : PCI Bus 0000:041000-10ff : 0000:04:00.02000-2fff : PCI Bus 0000:012000-20ff : 0000:01:00.03000-301f : 0000:00:1f.33000-301f : i801_smbus3020-303f : 0000:00:1d.33040-305f : 0000:00:1d.23060-307f : 0000:00 :1d.13080-309f : 0000:00:1d.030a0-30af : 0000:00:1f.230a0-30af : ata_piix30b0-30bf : 0000:00:1f.130b0-30bf : piix30c0-30c7 : 0000:00:1f.230c0-30c7 : ata_piix30c8-30cf : 0000:00:1f.230c8-30cf : ata_piix30e0-30e7 : 0000:00:02.030e8-30eb : 0000:00:1f.230e8-30eb : ata_piix30ec-30ef : 0000:00:1f.230ec-30ef : ata_piix4000-4fff : PCI Bus 0000:035000-5fff : PCI Bus 0000:02============ /proc/iomem =============00000000-0000ffff : reserved00010000-0008efff : System RAM0008f000-0009ffff : reserved000a0000-000bffff : PCI Bus 0000:00000a0000-000bffff : Video RAM area000c0000-000c7fff : Video ROM000cb000-000cbfff : Adapter ROM000e0000-000fffff : reserved000e0000-000effff : PCI Bus 0000:00000f0000-000fffff : System ROM00100000-7f531fff : System RAM01000000-0141a980 : Kernel code0141a981-0159cabf : Kernel data0160d000-0166cfff : Kernel bss7f532000-7f539fff : reserved7f53a000-7f5cafff : System RAM7f5cb000-7f5cefff : reserved7f5cf000-7f65ffff : System RAM7f660000-7f6effff : ACPI Non-volatile Storage7f6f0000-7f6f1fff : System RAM7f6f2000-7f6fefff : ACPI Tables7f6ff000-7f6fffff : System RAM7f700000-7fffffff : reserved80000000-ffffffff : reserved80000000-f0000000 : PCI Bus 0000:0080000000-8fffffff : 0000:00:02.090000000-900fffff : PCI Bus 0000:0190000000-9000ffff : 0000:01:00.090020000-9003ffff : 0000:01:00.090100000-901fffff : PCI Bus 0000:0490100000-901000ff : 0000:04:00.090200000-902fffff : PCI Bus 0000:0190200000-90200fff : 0000:01:00.090300000-9037ffff : 0000:00:02.090380000-903bffff : 0000:00:02.0903c0000-903c3fff : 0000:00:1b.0903c0000-903c3fff : ICH HD audio903c4000-903c43ff : 0000:00:1d.7903c4000-903c43ff : ehci_hcd90400000-904fffff : PCI Bus 0000:0490400000-9040ffff : 0000:04:00.090500000-906fffff : PCI Bus 0000:0390700000-908fffff : PCI Bus 0000:0390900000-90afffff : PCI Bus 0000:0290b00000-90cfffff : PCI Bus 0000:02f8000000-febfffff : PCI Bus 0000:00fec00000-fec003ff : IOAPIC 0fed00000-fed003ff : HPET 0fed13000-fed13fff : pnp 00:01fed14000-fed17fff : pnp 00:01fed18000-fed18fff : pnp 00:01fed19000-fed19fff : pnp 00:01fed1 c000-fed1ffff : pnp 00:01fed20000-fed3ffff : pnp 00:01fed45000-fed99fff : pnp 00:01fee00000-fee00fff : Local APIC============ /proc/scsi/scsi =============Attached devices:Host: scsi0 Channel: 00 Id: 00 Lun: 00Vendor: ATA Model: WDC WD5000AAKS-6 Rev: 05.0Type: Direct-Access ANSI SCSI revision: 05Host: scsi1 Channel: 00 Id: 00 Lun: 00Vendor: ATA Model: WDC WD5000AAKS-6 Rev: 05.0Type: Direct-Access ANSI SCSI revision: 05 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
