* find_busiest_group divide error
@ 2014-07-14 16:56 Greg Donald
2014-07-16 15:27 ` Peter Zijlstra
0 siblings, 1 reply; 6+ messages in thread
From: Greg Donald @ 2014-07-14 16:56 UTC (permalink / raw)
To: linux-kernel, Ingo Molnar, Peter Zijlstra
[-- Attachment #1: Type: text/plain, Size: 40581 bytes --]
[1.] One line summary of the problem:
find_busiest_group divide error
[2.] Full description of the problem/report:
Around June 7th I found I could no longer boot a mainline kernel. I
posted about it here on June 9th:
http://lists.kernelnewbies.org/pipermail/kernelnewbies/2014-June/010914.html
I bisected two complete times but never got to a commit that made any
sense:
https://bugzilla.kernel.org/show_bug.cgi?id=77711
I see a lot of kernel/sched/fair.c patching appeared in mainline on June
5th:
https://github.com/torvalds/linux/commits/master/kernel/sched/fair.c
So I tried checking out specific revisions and found
09dc4ab03936df5c5aa711d27c81283c6d09f495 is the latest good revision I
can boot. The first bad revision I hit is
51f2176d74ace4c3f58579a605ef5a9720befb00.
I have no idea how to fix it. I'm just a web developer/kernel tester :(
The issue affects both of my identical 32-bit file servers while all my
64-bit systems have no issues.
I'd be happy to test any patches anyone has to offer.
[3.] Keywords (i.e., modules, networking, kernel):
scheduler, find_busiest_group
[4.] Kernel information
[4.1.] Kernel version (from /proc/version):
Linux version 3.15.0-rc2-4+ (root@mars) (gcc version 4.7.2 (Debian
4.7.2-5) ) #1 SMP Thu Jul 10 17:24:56 CDT 2014
[4.2.] Kernel .config file:
Attached.
[5.] Most recent kernel version which did not have the bug:
09dc4ab03936df5c5aa711d27c81283c6d09f495
[6.] Output of Oops.. message (if applicable) with symbolic information
resolved (see Documentation/oops-tracing.txt)
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 3.15.0-1+ (root at mars) (gcc version 4.7.2
(Debian 4.7.2-5) ) #1 SMP Mon Jun 9 11:43:45 CDT 2014
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009dfff]
usable
[ 0.000000] BIOS-e820: [mem 0x000000000009e000-0x000000000009ffff]
reserved
[ 0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff]
reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000003fffb9ff]
usable
[ 0.000000] BIOS-e820: [mem 0x000000003fffba00-0x000000003fffffff]
ACPI data
[ 0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000ffffffff]
reserved
[ 0.000000] Notice: NX (Execute Disable) protection missing in CPU!
[ 0.000000] SMBIOS 2.3 present.
[ 0.000000] e820: last_pfn = 0x3fffb max_arch_pfn = 0x100000
[ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new
0x7010600070106
[ 0.000000] found SMP MP-table at [mem 0x0009e140-0x0009e14f]
mapped at [c009e140]
[ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[ 0.000000] init_memory_mapping: [mem 0x37000000-0x373fffff]
[ 0.000000] init_memory_mapping: [mem 0x30000000-0x36ffffff]
[ 0.000000] init_memory_mapping: [mem 0x00100000-0x2fffffff]
[ 0.000000] init_memory_mapping: [mem 0x37400000-0x377fdfff]
[ 0.000000] RAMDISK: [mem 0x37844000-0x37c19fff]
[ 0.000000] Allocated new RAMDISK: [mem 0x37428000-0x377fd57f]
[ 0.000000] Move RAMDISK from [mem 0x37844000-0x37c1957f] to [mem
0x37428000-0x377fd57f]
[ 0.000000] ACPI: Early table checksum verification disabled
[ 0.000000] ACPI: RSDP 0x000FDFC0 000014 (v00 IBM )
[ 0.000000] ACPI: RSDT 0x3FFFFF80 000030 (v01 IBM SERONYXP
00001000 IBM 45444F43)
[ 0.000000] ACPI: FACP 0x3FFFFF00 000074 (v01 IBM SERONYXP
00001000 IBM 45444F43)
[ 0.000000] ACPI: DSDT 0x3FFFBA00 0042FA (v01 IBM SERTURQU
00001000 MSFT 0100000B)
[ 0.000000] ACPI: FACS 0x3FFFFE00 000040
[ 0.000000] ACPI: APIC 0x3FFFFE40 000092 (v01 IBM SERONYXP
00001000 IBM 45444F43)
[ 0.000000] ACPI: ASF! 0x3FFFFD80 00004B (v16 IBM SERONYXP
00000001 IBM 45444F43)
[ 0.000000] 135MB HIGHMEM available.
[ 0.000000] 887MB LOWMEM available.
[ 0.000000] mapped low ram: 0 - 377fe000
[ 0.000000] low ram: 0 - 377fe000
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x00001000-0x00ffffff]
[ 0.000000] Normal [mem 0x01000000-0x377fdfff]
[ 0.000000] HighMem [mem 0x377fe000-0x3fffafff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x00001000-0x0009dfff]
[ 0.000000] node 0: [mem 0x00100000-0x3fffafff]
[ 0.000000] Using APIC driver default
[ 0.000000] ACPI: PM-Timer IO Port: 0x488
[ 0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x06] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x07] enabled)
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x00] dfl dfl lint[0x1])
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x06] dfl dfl lint[0x1])
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] dfl dfl lint[0x1])
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x07] dfl dfl lint[0x1])
[ 0.000000] ACPI: IOAPIC (id[0x0e] address[0xfec00000] gsi_base[0])
[ 0.000000] IOAPIC[0]: apic_id 14, version 17, address 0xfec00000,
GSI 0-15
[ 0.000000] ACPI: IOAPIC (id[0x0d] address[0xfec01000] gsi_base[16])
[ 0.000000] IOAPIC[1]: apic_id 13, version 17, address 0xfec01000,
GSI 16-31
[ 0.000000] ACPI: IOAPIC (id[0x0c] address[0xfec02000] gsi_base[32])
[ 0.000000] IOAPIC[2]: apic_id 12, version 17, address 0xfec02000,
GSI 32-47
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] Using ACPI (MADT) for SMP configuration information
[ 0.000000] smpboot: Allowing 4 CPUs, 0 hotplug CPUs
[ 0.000000] e820: [mem 0x40000000-0xfebfffff] available for PCI
devices
[ 0.000000] setup_percpu: NR_CPUS:4 nr_cpumask_bits:4 nr_cpu_ids:4
nr_node_ids:1
[ 0.000000] PERCPU: Embedded 12 pages/cpu @f6bf1000 s27520 r0 d21632
u49152
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on.
Total pages: 260264
[ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-3.15.0-1+
root=/dev/mapper/g-root ro console=ttyS0,115200n8 console=tty0
[ 0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288
bytes)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144
bytes)
[ 0.000000] Initializing CPU#0
[ 0.000000] Initializing HighMem for node 0 (000377fe:0003fffb)
[ 0.000000] Initializing Movable for node 0 (00000000:00000000)
[ 0.000000] Memory: 1030380K/1048160K available (2660K kernel code,
229K rwdata, 880K rodata, 392K init, 340K bss, 17780K reserved,
139252K highmem)
[ 0.000000] virtual kernel memory layout:
[ 0.000000] fixmap : 0xfff67000 - 0xfffff000 ( 608 kB)
[ 0.000000] pkmap : 0xff800000 - 0xffc00000 (4096 kB)
[ 0.000000] vmalloc : 0xf7ffe000 - 0xff7fe000 ( 120 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xf77fe000 ( 887 MB)
[ 0.000000] .init : 0xc13b2000 - 0xc1414000 ( 392 kB)
[ 0.000000] .data : 0xc1299387 - 0xc13b0600 (1116 kB)
[ 0.000000] .text : 0xc1000000 - 0xc1299387 (2660 kB)
[ 0.000000] Checking if this processor honours the WP bit even in
supervisor mode...Ok.
[ 0.000000] SLUB: HWalign=128, Order=0-3, MinObjects=0, CPUs=4,
Nodes=1
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] NR_IRQS:2304 nr_irqs:1024 16
[ 0.000000] Console: colour VGA+ 80x25
[ 0.000000] console [tty0] enabled
[ 0.000000] console [ttyS0] enabled
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] tsc: Detected 1993.504 MHz processor
[ 0.012005] Calibrating delay loop (skipped), value calculated
using timer frequency.. 3987.00 BogoMIPS (lpj=7974016)
[ 0.020007] pid_max: default: 32768 minimum: 301
[ 0.024019] ACPI: Core revision 20140424
[ 0.034484] ACPI: All ACPI Tables successfully acquired
[ 0.041027] Security Framework initialized
[ 0.044029] Mount-cache hash table entries: 2048 (order: 1, 8192
bytes)
[ 0.048008] Mountpoint-cache hash table entries: 2048 (order: 1, 8192
bytes)
[ 0.052395] Initializing cgroup subsys devices
[ 0.060007] Initializing cgroup subsys freezer
[ 0.064007] Initializing cgroup subsys net_cls
[ 0.068049] CPU: Physical Processor ID: 0
[ 0.072005] CPU: Processor Core ID: 0
[ 0.076006] mce: CPU supports 4 MCE banks
[ 0.080016] CPU0: Thermal monitoring enabled (TM1)
[ 0.084023] Last level iTLB entries: 4KB 64, 2MB 64, 4MB 64
[ 0.084023] Last level dTLB entries: 4KB 64, 2MB 0, 4MB 64, 1GB 0
[ 0.084023] tlb_flushall_shift: 6
[ 0.088172] Freeing SMP alternatives memory: 16K (c1414000 -
c1418000)
[ 0.092142] Enabling APIC mode: Flat. Using 3 I/O APICs
[ 0.100585] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[ 0.146513] smpboot: CPU0: Intel(R) Xeon(TM) CPU 2.00GHz (fam: 0f,
model: 02, stepping: 07)
[ 0.156000] Performance Events: Netburst events, Netburst P4/Xeon PMU
driver.
[ 0.158862] ... version: 0
[ 0.160004] ... bit width: 40
[ 0.164004] ... generic registers: 18
[ 0.168004] ... value mask: 000000ffffffffff
[ 0.172004] ... max period: 0000007fffffffff
[ 0.176004] ... fixed-purpose events: 0
[ 0.180004] ... event mask: 000000000003ffff
[ 0.184602] x86: Booting SMP configuration:
[ 0.188007] .... node #0, CPUs: #1
[ 0.016000] Initializing CPU#1
[ 0.288215] #2
[ 0.016000] Initializing CPU#2
[ 0.382274] #3
[ 0.016000] Initializing CPU#3
[ 0.478166] x86: Booted up 1 node, 4 CPUs
[ 0.480006] smpboot: Total of 4 processors activated (15949.07
BogoMIPS)
[ 0.485095] divide error: 0000 [#1] SMP
[ 0.488000] Modules linked in:
[ 0.488000] CPU: 2 PID: 6 Comm: kworker/u8:0 Not tainted 3.15.0-1+ #1
[ 0.488000] Hardware name: IBM eserver xSeries 335 -[867642X]-/,
BIOS -[T2E114AUS-1.03]- 11/14/2002
[ 0.488000] task: f6469860 ti: f6484000 task.ti: f6484000
[ 0.488000] EIP: 0060:[<c10500b3>] EFLAGS: 00010046 CPU: 2
[ 0.488000] EIP is at find_busiest_group+0x18a/0x583
[ 0.488000] EAX: 00000000 EBX: f6485db0 ECX: 00000000 EDX: 00000000
[ 0.488000] ESI: 00000004 EDI: 00000000 EBP: f6485de8 ESP: f6485d14
[ 0.488000] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 0.488000] CR0: 8005003b CR2: 00000068 CR3: 0141b000 CR4: 000007d0
[ 0.488000] Stack:
[ 0.488000] 00000000 00000001 00000002 000006f2 00000000 c1413280
ffffffff 00000000
[ 0.488000] f6c0f280 00000000 f6485e34 f6403460 000006f2 000003ff
000003ff 000001ff
[ 0.488000] 0000024d 00000002 00000001 00000000 00000001 00000000
00000000 00000000
[ 0.488000] Call Trace:
[ 0.488000] [<c105059b>] load_balance+0xef/0x5cb
[ 0.488000] [<c104b509>] ? sched_clock_local+0x11/0x139
[ 0.488000] [<c1050ffe>] pick_next_task_fair+0x28e/0x398
[ 0.488000] [<c1046ee9>] ? dequeue_task+0x8a/0x92
[ 0.488000] [<c1291b51>] __schedule+0x1f5/0x673
[ 0.488000] [<c1291e96>] ? __schedule+0x53a/0x673
[ 0.488000] [<c104967d>] ? default_wake_function+0xb/0xd
[ 0.488000] [<c10549db>] ? __wake_up_common+0x34/0x5a
[ 0.488000] [<c1292071>] schedule+0x56/0x58
[ 0.488000] [<c103dbbc>] worker_thread+0x244/0x27d
[ 0.488000] [<c103d978>] ? manage_workers.isra.28+0x189/0x189
[ 0.488000] [<c1041668>] kthread+0x9f/0xa4
[ 0.488000] [<c1298241>] ret_from_kernel_thread+0x21/0x30
[ 0.488000] [<c10415c9>] ? kthread_freezable_should_stop+0x40/0x40
[ 0.488000] Code: 72 0e 00 3b 05 a0 d9 3a c1 89 c6 0f 8c 7b ff ff
ff 8b 95 58 ff ff ff 8b 7b 14 8b 42 0c 31 d2 8b 48 04 8b 43 04 89 4b
10 c1 e0 0a <f7> f1 85 ff 89 85 38 ff ff ff 89 03 7
[ 0.488000] EIP: [<c10500b3>] find_busiest_group+0x18a/0x583 SS:ESP
0068:f6485d14
[ 0.488000] divide error: 0000 [#2] [ 0.488000] ---[ end trace
242397e5073f2949 ]---
[ 0.488000] SMP
[ 0.488000] Modules linked in:
[ 0.488000] CPU: 0 PID: 2 Comm: kthreadd Tainted: G D
3.15.0-1+ #1
[ 0.488000] Hardware name: IBM eserver xSeries 335 -[867642X]-/,
BIOS -[T2E114AUS-1.03]- 11/14/2002
[ 0.488000] task: f64684e0 ti: f647c000 task.ti: f647c000
[ 0.488000] EIP: 0060:[<c104ccc9>] EFLAGS: 00010046 CPU: 0
[ 0.488000] EIP is at select_task_rq_fair+0x3f5/0x546
[ 0.488000] EAX: 00000000 EBX: f6403460 ECX: f6403480 EDX: 00000000
[ 0.488000] ESI: f643ca00 EDI: 00000000 EBP: f647df2c ESP: f647dec8
[ 0.488000] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 0.488000] CR0: 8005003b CR2: ffe67000 CR3: 0141b000 CR4: 000007d0
[ 0.488000] Stack:
[ 0.488000] f646f500 00000002 00000000 f647dedc c1087da7 f647df40
c102d562 f6403470
[ 0.488000] 00000070 00000008 00000000 00000379 f6bf4a80 00000000
c1413280 f646f500
[ 0.488000] 00000000 f64684e0 f6403420 00000000 00000000 00000000
f646f500 c12a14ec
[ 0.488000] Call Trace:
[ 0.488000] [<c1087da7>] ? perf_event_fork+0xf/0x11
[ 0.488000] [<c102d562>] ? copy_process.part.42+0x1068/0x1255
[ 0.488000] [<c10496e7>] wake_up_new_task+0x30/0xea
[ 0.488000] [<c10415c9>] ? kthread_freezable_should_stop+0x40/0x40
[ 0.488000] [<c102d90c>] do_fork+0x10c/0x237
[ 0.488000] [<c10493a4>] ? do_set_cpus_allowed+0x2d/0x37
[ 0.488000] [<c10415c9>] ? kthread_freezable_should_stop+0x40/0x40
[ 0.488000] [<c102da51>] kernel_thread+0x1a/0x1f
[ 0.488000] [<c1041ad5>] kthreadd+0xc7/0x10e
[ 0.488000] [<c1298241>] ret_from_kernel_thread+0x21/0x30
[ 0.488000] [<c1041a0e>] ? kthread_create_on_cpu+0x44/0x44
[ 0.488000] Code: ff ff 8b 4d a0 01 45 f0 8b 45 b8 41 ba 04 00 00
00 e8 10 57 0f 00 3b 05 a0 d9 3a c1 89 c1 7c c8 8b 45 f0 31 d2 8b 4b
0c c1 e0 0a <f7> 71 04 83 7d c4 00 75 07 3b 45 dc 6
[ 0.488000] EIP: [<c104ccc9>] select_task_rq_fair+0x3f5/0x546
SS:ESP 0068:f647dec8
[ 0.488000] ---[ end trace 242397e5073f294a ]---
[ 0.488000] BUG: unable to handle kernel paging request at ffffffec
[ 0.488000] IP: [<c1041927>] kthread_data+0xa/0xe
[ 0.488000] *pde = 0141d067 *pte = 00000000
[ 0.488000] Oops: 0000 [#3] SMP
[ 0.488000] Modules linked in:
[ 0.488000] CPU: 2 PID: 6 Comm: kworker/u8:0 Tainted: G D
3.15.0-1+ #1
[ 0.488000] Hardware name: IBM eserver xSeries 335 -[867642X]-/,
BIOS -[T2E114AUS-1.03]- 11/14/2002
[ 0.488000] task: f6469860 ti: f6484000 task.ti: f6484000
[ 0.488000] EIP: 0060:[<c1041927>] EFLAGS: 00010002 CPU: 2
[ 0.488000] EIP is at kthread_data+0xa/0xe
[ 0.488000] EAX: 00000000 EBX: 00000002 ECX: 00000000 EDX: 00000002
[ 0.488000] ESI: 00000002 EDI: f6469860 EBP: f6485b2c ESP: f6485b24
[ 0.488000] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 0.488000] CR0: 8005003b CR2: 00000014 CR3: 0141b000 CR4: 000007d0
[ 0.488000] Stack:
[ 0.488000] c103dd15 f6469ad8 f6485ba0 c1291a39 f6485b48 c1413280
c1413280 f640e100
[ 0.488000] c10b6499 f6c0f280 f6469860 f6471b80 f6485b70 00000246
00406408 00000246
[ 0.488000] f6469860 f6469860 00000000 f6485b7c c105f724 00000000
f6485ba8 c102eba0
[ 0.488000] Call Trace:
[ 0.488000] [<c103dd15>] ? wq_worker_sleeping+0xb/0x76
[ 0.488000] [<c1291a39>] __schedule+0xdd/0x673
[ 0.488000] [<c10b6499>] ? kmem_cache_free+0xd0/0xd9
[ 0.488000] [<c105f724>] ? call_rcu_sched+0xf/0x12
[ 0.488000] [<c102eba0>] ? release_task+0x387/0x399
[ 0.488000] [<c1292071>] schedule+0x56/0x58
[ 0.488000] [<c102feaf>] do_exit+0x75d/0x7b3
[ 0.488000] [<c128f935>] ? printk+0x17/0x19
[ 0.488000] [<c1294d00>] oops_end+0x8e/0x96
[ 0.488000] [<c1004094>] die+0x54/0x5c
[ 0.488000] [<c12948e7>] do_trap+0x69/0xa4
[ 0.488000] [<c1002080>] ? math_state_restore+0x180/0x180
[ 0.488000] [<c10020ee>] do_divide_error+0x6e/0x78
[ 0.488000] [<c10500b3>] ? find_busiest_group+0x18a/0x583
[ 0.488000] [<c12946ce>] error_code+0x5a/0x60
[ 0.488000] [<c1002080>] ? math_state_restore+0x180/0x180
[ 0.488000] [<c10500b3>] ? find_busiest_group+0x18a/0x583
[ 0.488000] [<c105059b>] load_balance+0xef/0x5cb
[ 0.488000] [<c104b509>] ? sched_clock_local+0x11/0x139
[ 0.488000] [<c1050ffe>] pick_next_task_fair+0x28e/0x398
[ 0.488000] [<c1046ee9>] ? dequeue_task+0x8a/0x92
[ 0.488000] [<c1291b51>] __schedule+0x1f5/0x673
[ 0.488000] [<c1291e96>] ? __schedule+0x53a/0x673
[ 0.488000] [<c104967d>] ? default_wake_function+0xb/0xd
[ 0.488000] [<c10549db>] ? __wake_up_common+0x34/0x5a
[ 0.488000] [<c1292071>] schedule+0x56/0x58
[ 0.488000] [<c103dbbc>] worker_thread+0x244/0x27d
[ 0.488000] [<c103d978>] ? manage_workers.isra.28+0x189/0x189
[ 0.488000] [<c1041668>] kthread+0x9f/0xa4
[ 0.488000] [<c1298241>] ret_from_kernel_thread+0x21/0x30
[ 0.488000] [<c10415c9>] ? kthread_freezable_should_stop+0x40/0x40
[ 0.488000] Code: c4 3c 5b 5e 5f 5d c3 55 64 a1 ac e6 40 c1 8b 80
4c 02 00 00 89 e5 5d 8b 40 e4 c1 e8 02 83 e0 01 c3 55 8b 80 4c 02 00
00 89 e5 5d <8b> 40 ec c3 55 b9 04 00 00 00 89 e5 5
[ 0.488000] EIP: [<c1041927>] kthread_data+0xa/0xe SS:ESP
0068:f6485b24
[ 0.488000] CR2: 00000000ffffffec
[ 0.488000] ---[ end trace 242397e5073f294b ]---
[ 0.488000] Fixing recursive fault but reboot is needed!
[ 0.488051] divide error: 0000 [#4] SMP
[ 0.492000] Modules linked in:
[ 0.492000] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G D
3.15.0-1+ #1
[ 0.492000] Hardware name: IBM eserver xSeries 335 -[867642X]-/,
BIOS -[T2E114AUS-1.03]- 11/14/2002
[ 0.492000] task: f6468000 ti: f644c000 task.ti: f644c000
[ 0.492000] EIP: 0060:[<c10500b3>] EFLAGS: 00010046 CPU: 0
[ 0.492000] EIP is at find_busiest_group+0x18a/0x583
[ 0.492000] EAX: 00000000 EBX: f644dc9c ECX: 00000000 EDX: 00000000
[ 0.492000] ESI: 00000004 EDI: ffffffff EBP: f644dd40 ESP: f644dc6c
[ 0.492000] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 0.492000] CR0: 8005003b CR2: ffe67000 CR3: 0141b000 CR4: 000007d0
[ 0.492000] Stack:
[ 0.492000] b6cb9571 00000001 00000001 00000000 00000000 c1413280
00000000 00000000
[ 0.492000] f6c0f280 00000000 f644dd8c f6403460 00000000 00000000
00000000 00000000
[ 0.492000] 00000000 ffffffff 00000000 00000000 00000000 00000000
00000000 00000000
[ 0.492000] Call Trace:
[ 0.492000] [<c105059b>] load_balance+0xef/0x5cb
[ 0.492000] [<c104b509>] ? sched_clock_local+0x11/0x139
[ 0.492000] [<c1050ffe>] pick_next_task_fair+0x28e/0x398
[ 0.492000] [<c1046ee9>] ? dequeue_task+0x8a/0x92
[ 0.492000] [<c1291b51>] __schedule+0x1f5/0x673
[ 0.492000] [<c1291e96>] ? __schedule+0x53a/0x673
[ 0.492000] [<c104d006>] ? check_preempt_wakeup+0xf9/0x13f
[ 0.492000] [<c1292071>] schedule+0x56/0x58
[ 0.492000] [<c12915ef>] schedule_timeout+0x17/0x10e
[ 0.492000] [<c104738a>] ? check_preempt_curr+0x27/0x62
[ 0.492000] [<c10473d6>] ? ttwu_do_wakeup+0x11/0xba
[ 0.492000] [<c129269c>] wait_for_common+0xc0/0xe3
[ 0.492000] [<c1049672>] ? try_to_wake_up+0x1aa/0x1aa
[ 0.492000] [<c1292724>] wait_for_completion_killable+0x12/0x21
[ 0.492000] [<c10416f8>] kthread_create_on_node+0x8b/0xf9
[ 0.492000] [<c103ea61>] __alloc_workqueue_key+0x21a/0x302
[ 0.492000] [<c103d4f2>] ? process_scheduled_works+0x21/0x21
[ 0.492000] [<c13c3a16>] usermodehelper_init+0x1a/0x2a
[ 0.492000] [<c13b2a65>] kernel_init_freeable+0xb6/0x19d
[ 0.492000] [<c128d68f>] kernel_init+0x8/0xb3
[ 0.492000] [<c1298241>] ret_from_kernel_thread+0x21/0x30
[ 0.492000] [<c128d687>] ? rest_init+0x5f/0x5f
[ 0.492000] Code: 72 0e 00 3b 05 a0 d9 3a c1 89 c6 0f 8c 7b ff ff
ff 8b 95 58 ff ff ff 8b 7b 14 8b 42 0c 31 d2 8b 48 04 8b 43 04 89 4b
10 c1 e0 0a <f7> f1 85 ff 89 85 38 ff ff ff 89 03 7
[ 0.492000] EIP: [<c10500b3>] find_busiest_group+0x18a/0x583 SS:ESP
0068:f644dc6c
[ 0.492000] ---[ end trace 242397e5073f294c ]---
[ 0.492000] divide error: 0000 [#5] SMP
[ 0.492000] Modules linked in:
[ 0.492000] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G D
3.15.0-1+ #1
[ 0.492000] Hardware name: IBM eserver xSeries 335 -[867642X]-/,
BIOS -[T2E114AUS-1.03]- 11/14/2002
[ 0.492000] task: f646b5a0 ti: f6490000 task.ti: f6490000
[ 0.492000] EIP: 0060:[<c10500b3>] EFLAGS: 00210246 CPU: 3
[ 0.492000] EIP is at find_busiest_group+0x18a/0x583
[ 0.492000] EAX: 00000000 EBX: f64bde38 ECX: 00000000 EDX: 00000000
[ 0.492000] ESI: 00000004 EDI: ffffffff EBP: f64bdedc ESP: f64bde08
[ 0.492000] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 0.492000] CR0: 8005003b CR2: 00000000 CR3: 0141b000 CR4: 000007d0
[ 0.492000] Stack:
[ 0.492000] 00000000 00000001 00000001 00000000 00000000 c1413280
00000000 00000001
[ 0.492000] f6c0f280 00000000 f64bdf28 f6403460 00000000 00000000
00000000 00000000
[ 0.492000] 00000000 ffffffff 00000000 00000000 00000000 00000000
00000000 00000000
[ 0.492000] Call Trace:
[ 0.492000] [<c105059b>] load_balance+0xef/0x5cb
[ 0.492000] [<c104d9bb>] ? update_blocked_averages+0x53f/0x547
[ 0.492000] [<c1050bac>] rebalance_domains+0x135/0x1ed
[ 0.492000] [<c1050c92>] run_rebalance_domains+0x2e/0x10c
[ 0.492000] [<c10312c5>] __do_softirq+0x91/0x174
[ 0.492000] [<c1031234>] ? __hrtimer_tasklet_trampoline+0x1a/0x1a
[ 0.492000] [<c10032ff>] do_softirq_own_stack+0x1d/0x23
[ 0.492000] <IRQ>
[ 0.492000] [<c10314e7>] irq_exit+0x34/0x75
[ 0.492000] [<c102148d>] smp_apic_timer_interrupt+0x33/0x3d
[ 0.492000] [<c12944a5>] apic_timer_interrupt+0x2d/0x34
[ 0.492000] [<c104007b>] ? param_array_set+0x23/0xc0
[ 0.492000] [<c10076b5>] ? default_idle+0x5/0x7
[ 0.492000] [<c1007bcd>] arch_cpu_idle+0x9/0xb
[ 0.492000] [<c10550c1>] cpu_startup_entry+0xe6/0x1c9
[ 0.492000] [<c101ffad>] start_secondary+0x1a6/0x1ab
[ 0.492000] Code: 72 0e 00 3b 05 a0 d9 3a c1 89 c6 0f 8c 7b ff ff
ff 8b 95 58 ff ff ff 8b 7b 14 8b 42 0c 31 d2 8b 48 04 8b 43 04 89 4b
10 c1 e0 0a <f7> f1 85 ff 89 85 38 ff ff ff 89 03 7
[ 0.492000] EIP: [<c10500b3>] find_busiest_group+0x18a/0x583 SS:ESP
0068:f64bde08
[ 0.492000] divide error: 0000 [#6]
[ 0.492000] ---[ end trace 242397e5073f294d ]---
[ 0.492000] SMP
[ 0.492000] Kernel panic - not syncing: Fatal exception in interrupt
[ 0.492000] Modules linked in:
[ 0.492000] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D
3.15.0-1+ #1
[ 0.492000] Hardware name: IBM eserver xSeries 335 -[867642X]-/,
BIOS -[T2E114AUS-1.03]- 11/14/2002
[ 0.492000] task: f646abe0 ti: f648c000 task.ti: f648c000
[ 0.492000] EIP: 0060:[<c10500b3>] EFLAGS: 00210246 CPU: 1
[ 0.492000] EIP is at find_busiest_group+0x18a/0x583
[ 0.492000] EAX: 00000000 EBX: f649de38 ECX: 00000000 EDX: 00000000
[ 0.492000] ESI: 00000004 EDI: ffffffff EBP: f649dedc ESP: f649de08
[ 0.492000] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 0.492000] CR0: 8005003b CR2: 00000000 CR3: 0141b000 CR4: 000007d0
[ 0.492000] Stack:
[ 0.492000] 00000000 00000001 00000001 00000000 00000000 c1413280
00000000 00000001
[ 0.492000] f6c0f280 00000000 f649df28 f6403460 00000000 00000000
00000000 00000000
[ 0.492000] 00000000 ffffffff 00000000 00000000 00000000 00000000
00000000 00000000
[ 0.492000] Call Trace:
[ 0.492000] [<c105059b>] load_balance+0xef/0x5cb
[ 0.492000] [<c104d9bb>] ? update_blocked_averages+0x53f/0x547
[ 0.492000] [<c1050bac>] rebalance_domains+0x135/0x1ed
[ 0.492000] [<c1050c92>] run_rebalance_domains+0x2e/0x10c
[ 0.492000] [<c10312c5>] __do_softirq+0x91/0x174
[ 0.492000] [<c1031234>] ? __hrtimer_tasklet_trampoline+0x1a/0x1a
[ 0.492000] [<c10032ff>] do_softirq_own_stack+0x1d/0x23
[ 0.492000] <IRQ>
[ 0.492000] [<c10314e7>] irq_exit+0x34/0x75
[ 0.492000] [<c102148d>] smp_apic_timer_interrupt+0x33/0x3d
[ 0.492000] [<c12944a5>] apic_timer_interrupt+0x2d/0x34
[ 0.492000] [<c104007b>] ? param_array_set+0x23/0xc0
[ 0.492000] [<c10076b5>] ? default_idle+0x5/0x7
[ 0.492000] [<c1007bcd>] arch_cpu_idle+0x9/0xb
[ 0.492000] [<c10550c1>] cpu_startup_entry+0xe6/0x1c9
[ 0.492000] [<c101ffad>] start_secondary+0x1a6/0x1ab
[ 0.492000] Code: 72 0e 00 3b 05 a0 d9 3a c1 89 c6 0f 8c 7b ff ff
ff 8b 95 58 ff ff ff 8b 7b 14 8b 42 0c 31 d2 8b 48 04 8b 43 04 89 4b
10 c1 e0 0a <f7> f1 85 ff 89 85 38 ff ff ff 89 03 7
[ 0.492000] EIP: [<c10500b3>] find_busiest_group+0x18a/0x583 SS:ESP
0068:f649de08
[ 0.492000] Shutting down cpus with NMI
[ 0.492000] ---[ end Kernel panic - not syncing: Fatal exception in
interrupt
[7.] A small shell script or example program which triggers the
problem (if possible)
Happens on boot.
[8.] Environment
[8.1.] Software (add the output of the ver_linux script here)
Linux mars 3.15.0-rc2-4+ #1 SMP Thu Jul 10 17:24:56 CDT 2014 i686
GNU/Linux
Gnu C 4.7
Gnu make 3.81
binutils 2.22
util-linux 2.20.1
mount support
module-init-tools 9
e2fsprogs 1.42.5
PPP 2.4.5
Linux C Library 2.13
Dynamic linker (ldd) 2.13
Procps 3.3.3
Net-tools 1.60
Kbd 1.15.3
Sh-utils 8.13
Modules Loaded speedstep_lib cpufreq_userspace cpufreq_powersave
cpufreq_stats cpufreq_conservative binfmt_misc fuse nfsd auth_rpcgss
oid_registry nfs_acl nfs lockd fscache sunrpc loop psmouse serio_raw
pcspkr evdev i2c_piix4 i2c_core parport_pc parport processor button
thermal_sys ext4 crc16 jbd2 mbcache dm_mod raid0 md_mod sg sd_mod sr_mod
cdrom crc_t10dif crct10dif_common ata_generic tg3 pata_serverworks
mptspi scsi_transport_spi mptscsih ptp floppy mptbase libata pps_core
libphy scsi_mod
[8.2.] Processor information (from /proc/cpuinfo):
Linux mars 3.15.0-rc2-4+ #1 SMP Thu Jul 10 17:24:56 CDT 2014 i686
GNU/Linux
Gnu C 4.7
Gnu make 3.81
binutils 2.22
util-linux 2.20.1
mount support
module-init-tools 9
e2fsprogs 1.42.5
PPP 2.4.5
Linux C Library 2.13
Dynamic linker (ldd) 2.13
Procps 3.3.3
Net-tools 1.60
Kbd 1.15.3
Sh-utils 8.13
Modules Loaded speedstep_lib cpufreq_userspace cpufreq_powersave
cpufreq_stats cpufreq_conservative binfmt_misc fuse nfsd auth_rpcgss
oid_registry nfs_acl nfs lockd fscache sunrpc loop psmouse serio_raw
pcspkr evdev i2c_piix4 i2c_core parport_pc parport processor button
thermal_sys ext4 crc16 jbd2 mbcache dm_mod raid0 md_mod sg sd_mod sr_mod
cdrom crc_t10dif crct10dif_common ata_generic tg3 pata_serverworks
mptspi scsi_transport_spi mptscsih ptp floppy mptbase libata pps_core
libphy scsi_mod
[8.3.] Module information (from /proc/modules):
speedstep_lib 12463 0 - Live 0xf8330000
cpufreq_userspace 12477 0 - Live 0xf832b000
cpufreq_powersave 12422 0 - Live 0xf8508000
cpufreq_stats 12767 0 - Live 0xf8590000
cpufreq_conservative 13872 0 - Live 0xf88e8000
binfmt_misc 12768 1 - Live 0xf8a99000
fuse 61916 1 - Live 0xf8777000
nfsd 165008 2 - Live 0xf8487000
auth_rpcgss 33963 1 nfsd, Live 0xf83e4000
oid_registry 12387 1 auth_rpcgss, Live 0xf83df000
nfs_acl 12463 1 nfsd, Live 0xf8395000
nfs 111573 0 - Live 0xf84bb000
lockd 49499 2 nfsd,nfs, Live 0xf840c000
fscache 37619 1 nfs, Live 0xf83f1000
sunrpc 138905 6 nfsd,auth_rpcgss,nfs_acl,nfs,lockd, Live 0xf8e02000
loop 22223 0 - Live 0xf8647000
psmouse 65105 0 - Live 0xf83c2000
serio_raw 12774 0 - Live 0xf8316000
pcspkr 12531 0 - Live 0xf8286000
evdev 17224 4 - Live 0xf83b1000
i2c_piix4 12592 0 - Live 0xf831c000
i2c_core 28790 1 i2c_piix4, Live 0xf83d6000
parport_pc 22073 0 - Live 0xf83bb000
parport 31658 1 parport_pc, Live 0xf8322000
processor 23363 0 - Live 0xf830f000
button 12824 0 - Live 0xf839a000
thermal_sys 23022 1 processor, Live 0xf8405000
ext4 341852 5 - Live 0xf8432000
crc16 12327 1 ext4, Live 0xf8281000
jbd2 58144 1 ext4, Live 0xf8385000
mbcache 13277 1 ext4, Live 0xf8276000
dm_mod 66924 15 - Live 0xf8373000
raid0 12829 1 - Live 0xf8269000
md_mod 86257 2 raid0, Live 0xf835c000
sg 21617 0 - Live 0xf8335000
sd_mod 35752 5 - Live 0xf82b5000
sr_mod 17541 0 - Live 0xf8298000
cdrom 30473 1 sr_mod, Live 0xf828c000
crc_t10dif 12399 1 sd_mod, Live 0xf8233000
crct10dif_common 12340 1 crc_t10dif, Live 0xf823f000
ata_generic 12450 0 - Live 0xf821f000
tg3 123463 0 - Live 0xf833c000
pata_serverworks 12791 3 - Live 0xf8224000
mptspi 17723 0 - Live 0xf827b000
scsi_transport_spi 19126 1 mptspi, Live 0xf8239000
mptscsih 22338 1 mptspi, Live 0xf826f000
ptp 17498 1 tg3, Live 0xf822d000
floppy 48260 0 - Live 0xf8302000
mptbase 52200 2 mptspi,mptscsih, Live 0xf82f4000
libata 126031 2 ata_generic,pata_serverworks, Live 0xf82c0000
pps_core 13016 1 ptp, Live 0xf820f000
libphy 23524 1 tg3, Live 0xf8214000
scsi_mod 140155 7
sg,sd_mod,sr_mod,mptspi,scsi_transport_spi,mptscsih,libata, Live
0xf8245000
[8.4.] Loaded driver and hardware information (/proc/ioports,
/proc/iomem)
0000-001f : dma1
0020-0021 : pic1
0040-0043 : timer0
0050-0053 : timer1
0060-0060 : keyboard
0064-0064 : keyboard
0070-0073 : rtc0
0080-008f : dma page reg
00a0-00a1 : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : 0000:00:0f.1
0170-0177 : pata_serverworks
01f0-01f7 : 0000:00:0f.1
01f0-01f7 : pata_serverworks
0376-0376 : 0000:00:0f.1
0376-0376 : pata_serverworks
03c0-03df : vga+
03f2-03f2 : floppy
03f4-03f5 : floppy
03f6-03f6 : 0000:00:0f.1
03f6-03f6 : pata_serverworks
03f7-03f7 : floppy
03f8-03ff : serial
0420-0427 : pnp 00:00
0440-0447 : piix4_smbus
0460-0461 : pnp 00:00
0480-0483 : ACPI PM1a_EVT_BLK
0484-0485 : ACPI PM1a_CNT_BLK
0488-048b : ACPI PM_TMR
0498-049f : ACPI GPE0_BLK
0500-0503 : pnp 00:00
0500-0503 : ACPI PM1b_EVT_BLK
0504-0507 : pnp 00:00
0504-0505 : ACPI PM1b_CNT_BLK
0510-0517 : pnp 00:00
0510-0517 : ACPI GPE1_BLK
0600-0600 : pnp 00:0a
0700-070f : 0000:00:0f.1
0700-070f : pata_serverworks
0cf8-0cff : PCI conf1
0f50-0f58 : pnp 00:0a
2200-22ff : 0000:00:01.0
2300-23ff : 0000:01:01.0
2300-23ff : mpt
00000000-00000fff : reserved
00001000-0009dfff : System RAM
0009e000-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000c8000-000c87ff : Adapter ROM
000c8800-000c9fff : Adapter ROM
000e0000-000fffff : reserved
000f0000-000fffff : System ROM
00100000-3fffb9ff : System RAM
01000000-012fe0a0 : Kernel code
012fe0a1-014850ff : Kernel data
014f7000-01580fff : Kernel bss
3fffba00-3fffffff : ACPI Tables
40000000-4001ffff : 0000:00:01.0
40100000-401fffff : 0000:01:01.0
f9fe0000-f9feffff : 0000:02:02.0
f9fe0000-f9feffff : tg3
f9ff0000-f9ffffff : 0000:02:01.0
f9ff0000-f9ffffff : tg3
fbfe0000-fbfeffff : 0000:01:01.0
fbfe0000-fbfeffff : mpt
fbff0000-fbffffff : 0000:01:01.0
fbff0000-fbffffff : mpt
fd000000-fdffffff : 0000:00:01.0
febfe000-febfefff : 0000:00:0f.2
febff000-febfffff : 0000:00:01.0
fec00000-ffffffff : reserved
fec00000-fec003ff : IOAPIC 0
fec01000-fec013ff : IOAPIC 1
fec02000-fec023ff : IOAPIC 2
fee00000-fee00fff : Local APIC
[8.5.] PCI information ('lspci -vvv' as root)
00:00.0 Host bridge: Broadcom CMIC-WS Host Bridge (GC-LE chipset) (rev
13)
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
00:00.1 Host bridge: Broadcom CMIC-WS Host Bridge (GC-LE chipset)
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
00:00.2 Host bridge: Broadcom CMIC-LE
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
00:01.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI
Rage XL (rev 27) (prog-if 00 [VGA controller])
Subsystem: IBM eServer xSeries server mainboard
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping+ SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0 (2000ns min), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 10
Region 0: Memory at fd000000 (32-bit, non-prefetchable)
[size=16M]
Region 1: I/O ports at 2200 [size=256]
Region 2: Memory at febff000 (32-bit, non-prefetchable)
[size=4K]
[virtual] Expansion ROM at 40000000 [disabled] [size=128K]
Capabilities: [5c] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
00:0f.0 Host bridge: Broadcom CSB5 South Bridge (rev 93)
Subsystem: Broadcom CSB5 South Bridge
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR- INTx-
Latency: 0
Kernel driver in use: piix4_smbus
00:0f.1 IDE interface: Broadcom CSB5 IDE Controller (rev 93) (prog-if 8a
[Master SecP PriP])
Subsystem: Broadcom CSB5 IDE Controller
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV+ VGASnoop-
ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64, Cache Line Size: 32 bytes
Region 0: I/O ports at 01f0 [size=8]
Region 1: I/O ports at 03f4 [size=1]
Region 2: I/O ports at 0170 [size=8]
Region 3: I/O ports at 0374 [size=1]
Region 4: I/O ports at 0700 [size=16]
Kernel driver in use: pata_serverworks
00:0f.2 USB controller: Broadcom OSB4/CSB5 OHCI USB Controller (rev 05)
(prog-if 10 [OHCI])
Subsystem: Broadcom OSB4/CSB5 OHCI USB Controller
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV+ VGASnoop-
ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 11
Region 0: Memory at febfe000 (32-bit, non-prefetchable)
[size=4K]
00:0f.3 ISA bridge: Broadcom CSB5 LPC bridge
Subsystem: Broadcom Device 0230
Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
00:11.0 Host bridge: Broadcom CIOB-X2 PCI-X I/O Bridge (rev 03)
Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR- INTx-
Capabilities: [60] PCI-X non-bridge device
Command: DPERE- ERO- RBC=512 OST=8
Status: Dev=00:00.0 64bit+ 133MHz+ SCD- USC- DC=bridge
DMMRBC=512 DMOST=8 DMCRS=8 RSCEM- 266MHz- 533MHz-
00:11.2 Host bridge: Broadcom CIOB-X2 PCI-X I/O Bridge (rev 03)
Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR- INTx-
Capabilities: [60] PCI-X non-bridge device
Command: DPERE- ERO- RBC=512 OST=8
Status: Dev=00:00.0 64bit+ 133MHz+ SCD- USC- DC=bridge
DMMRBC=512 DMOST=8 DMCRS=8 RSCEM- 266MHz- 533MHz-
01:01.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1030 PCI-X
Fusion-MPT Dual Ultra320 SCSI (rev 07)
Subsystem: IBM Device 026d
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop-
ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 72 (4250ns min, 4500ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 22
Region 0: I/O ports at 2300 [size=256]
Region 1: Memory at fbff0000 (64-bit, non-prefetchable)
[size=64K]
Region 3: Memory at fbfe0000 (64-bit, non-prefetchable)
[size=64K]
[virtual] Expansion ROM at 40100000 [disabled] [size=1M]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [58] MSI: Enable- Count=1/1 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [68] PCI-X non-bridge device
Command: DPERE- ERO- RBC=512 OST=1
Status: Dev=01:01.0 64bit+ 133MHz+ SCD- USC- DC=simple
DMMRBC=2048 DMOST=8 DMCRS=16 RSCEM- 266MHz- 533MHz-
Kernel driver in use: mptspi
02:01.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5703X
Gigabit Ethernet (rev 02)
Subsystem: IBM eServer xSeries server mainboard
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64 (16000ns min), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 24
Region 0: Memory at f9ff0000 (64-bit, non-prefetchable)
[size=64K]
Capabilities: [40] PCI-X non-bridge device
Command: DPERE- ERO- RBC=2048 OST=1
Status: Dev=02:01.1 64bit+ 133MHz+ SCD- USC- DC=simple
DMMRBC=2048 DMOST=1 DMCRS=16 RSCEM- 266MHz- 533MHz-
Capabilities: [48] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot+,D3cold+)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=1 PME-
Capabilities: [50] Vital Product Data
Product Name: Broadcom NetXtreme Gigabit Ethernet
Controller
Read-only fields:
[PN] Part number: BCM95703A30
[EC] Engineering changes: 106679-15
[SN] Serial number: 0123456789
[MN] Manufacture ID: 31 34 65 34
[RV] Reserved: checksum bad, 25 byte(s) reserved
Read/write fields:
[YA] Asset tag: XYZ01234567
[RW] Read-write area: 107 byte(s) free
End
Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
Address: ffff577dfffff3e4 Data: ffbf
Kernel driver in use: tg3
02:02.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5703X
Gigabit Ethernet (rev 02)
Subsystem: IBM eServer xSeries server mainboard
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64 (16000ns min), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 25
Region 0: Memory at f9fe0000 (64-bit, non-prefetchable)
[size=64K]
Capabilities: [40] PCI-X non-bridge device
Command: DPERE- ERO- RBC=2048 OST=1
Status: Dev=02:02.1 64bit+ 133MHz+ SCD- USC- DC=simple
DMMRBC=2048 DMOST=1 DMCRS=16 RSCEM- 266MHz- 533MHz-
Capabilities: [48] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot+,D3cold+)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=1 PME-
Capabilities: [50] Vital Product Data
Product Name: Broadcom NetXtreme Gigabit Ethernet
Controller
Read-only fields:
[PN] Part number: BCM95703A30
[EC] Engineering changes: 106679-15
[SN] Serial number: 0123456789
[MN] Manufacture ID: 31 34 65 34
[RV] Reserved: checksum bad, 25 byte(s) reserved
Read/write fields:
[YA] Asset tag: XYZ01234567
[RW] Read-write area: 107 byte(s) free
End
Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
Address: f7fbdf77ffefbfdc Data: fdff
Kernel driver in use: tg3
[8.6.] SCSI information (from /proc/scsi/scsi)
/proc/scsi/scsi: No such file or directory
[8.7.] Other information that might be relevant to the problem
(please look in /proc and include all information that you
think to be relevant):
[X.] Other notes, patches, fixes, workarounds:
--
Greg Donald
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: find_busiest_group divide error
2014-07-14 16:56 find_busiest_group divide error Greg Donald
@ 2014-07-16 15:27 ` Peter Zijlstra
2014-07-16 16:40 ` Bruno Wolff III
2014-07-16 17:52 ` Greg Donald
0 siblings, 2 replies; 6+ messages in thread
From: Peter Zijlstra @ 2014-07-16 15:27 UTC (permalink / raw)
To: Greg Donald; +Cc: linux-kernel, Ingo Molnar
[-- Attachment #1: Type: text/plain, Size: 1221 bytes --]
On Mon, Jul 14, 2014 at 11:56:59AM -0500, Greg Donald wrote:
>
> [1.] One line summary of the problem:
>
> find_busiest_group divide error
>
> [2.] Full description of the problem/report:
>
> Around June 7th I found I could no longer boot a mainline kernel. I
> posted about it here on June 9th:
>
> http://lists.kernelnewbies.org/pipermail/kernelnewbies/2014-June/010914.html
>
> I bisected two complete times but never got to a commit that made any
> sense:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=77711
>
> I see a lot of kernel/sched/fair.c patching appeared in mainline on June
> 5th:
>
> https://github.com/torvalds/linux/commits/master/kernel/sched/fair.c
>
> So I tried checking out specific revisions and found
> 09dc4ab03936df5c5aa711d27c81283c6d09f495 is the latest good revision I
> can boot. The first bad revision I hit is
> 51f2176d74ace4c3f58579a605ef5a9720befb00.
>
> I have no idea how to fix it. I'm just a web developer/kernel tester :(
>
Could you confirm if reverting caffcdd8d27ba78730d5540396ce72ad022aff2c
cures things for you?
Otherwise there's two very similar issues, see also:
lkml.kernel.org/r/20140716145546.GA6922@wolff.to
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: find_busiest_group divide error
2014-07-16 15:27 ` Peter Zijlstra
@ 2014-07-16 16:40 ` Bruno Wolff III
2014-07-16 17:52 ` Greg Donald
1 sibling, 0 replies; 6+ messages in thread
From: Bruno Wolff III @ 2014-07-16 16:40 UTC (permalink / raw)
To: Peter Zijlstra; +Cc: Greg Donald, linux-kernel, Ingo Molnar
>> So I tried checking out specific revisions and found
>> 09dc4ab03936df5c5aa711d27c81283c6d09f495 is the latest good revision I
>> can boot. The first bad revision I hit is
>> 51f2176d74ace4c3f58579a605ef5a9720befb00.
>>
>> I have no idea how to fix it. I'm just a web developer/kernel tester :(
>>
>
>Could you confirm if reverting caffcdd8d27ba78730d5540396ce72ad022aff2c
>cures things for you?
I think caffcdd8d27ba78730d5540396ce72ad022aff2c was merged after
3.15 (even though it seems to be based off of 3.15-rc6).
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: find_busiest_group divide error
2014-07-16 15:27 ` Peter Zijlstra
2014-07-16 16:40 ` Bruno Wolff III
@ 2014-07-16 17:52 ` Greg Donald
2014-07-16 21:31 ` Dietmar Eggemann
1 sibling, 1 reply; 6+ messages in thread
From: Greg Donald @ 2014-07-16 17:52 UTC (permalink / raw)
To: Peter Zijlstra; +Cc: linux-kernel, Ingo Molnar
[-- Attachment #1: Type: text/plain, Size: 1083 bytes --]
On Wed, Jul 16, 2014 at 05:27:36PM +0200, Peter Zijlstra wrote:
> Could you confirm if reverting caffcdd8d27ba78730d5540396ce72ad022aff2c
> cures things for you?
>
> Otherwise there's two very similar issues, see also:
>
> lkml.kernel.org/r/20140716145546.GA6922@wolff.to
Cured.
I reverted caffcdd8d27ba78730d5540396ce72ad022aff2c which did nothing as
far as I can tell, then I removed the
two lines from http://marc.info/?l=linux-kernel&m=140552264825755, then
I added back the one line from
https://bugzilla.kernel.org/show_bug.cgi?id=80251#c8.
I ended up with
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index dc2927c..7c3674d 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5848,7 +5848,6 @@ build_sched_groups(struct sched_domain *sd, int
cpu)
group = get_group(i, sdd, &sg);
cpumask_clear(sched_group_cpus(sg));
- sg->sgp->power = 0;
cpumask_setall(sched_group_mask(sg));
for_each_cpu(j, span) {
Thanks.
--
Greg Donald
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^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: find_busiest_group divide error
2014-07-16 17:52 ` Greg Donald
@ 2014-07-16 21:31 ` Dietmar Eggemann
2014-07-16 21:47 ` Greg Donald
0 siblings, 1 reply; 6+ messages in thread
From: Dietmar Eggemann @ 2014-07-16 21:31 UTC (permalink / raw)
To: Greg Donald, Peter Zijlstra; +Cc: linux-kernel, Ingo Molnar
Hi Greg,
On 16/07/14 19:52, Greg Donald wrote:
> On Wed, Jul 16, 2014 at 05:27:36PM +0200, Peter Zijlstra wrote:
>> Could you confirm if reverting caffcdd8d27ba78730d5540396ce72ad022aff2c
>> cures things for you?
>>
>> Otherwise there's two very similar issues, see also:
>>
>> lkml.kernel.org/r/20140716145546.GA6922@wolff.to
>
> Cured.
>
> I reverted caffcdd8d27ba78730d5540396ce72ad022aff2c which did nothing as
> far as I can tell, then I removed the
> two lines from http://marc.info/?l=linux-kernel&m=140552264825755, then
> I added back the one line from
> https://bugzilla.kernel.org/show_bug.cgi?id=80251#c8.
My patch caffcdd8d27ba78730d5540396ce72ad022aff2c got rid of
cpumask_clear(sched_group_cpus(sg)); and sg->sgp->power = 0; so
reverting it (and replacing sg->sgp->power = 0 with
sg->sgc->capacity = 0) should cure it too. (although the missing
cpumask_clear() is the culprit on your machine here).
Could I ask you to share the content of your /proc/cpuinfo file? I
suspect it might be the same topology as the one Bruno just sent out
(the one of a dual single core CPU with hyper-threading ?)
https://lkml.org/lkml/2014/7/16/603
Thanks,
-- Dietmar
>
> I ended up with
>
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index dc2927c..7c3674d 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -5848,7 +5848,6 @@ build_sched_groups(struct sched_domain *sd, int
> cpu)
>
> group = get_group(i, sdd, &sg);
> cpumask_clear(sched_group_cpus(sg));
> - sg->sgp->power = 0;
> cpumask_setall(sched_group_mask(sg));
>
> for_each_cpu(j, span) {
>
>
> Thanks.
>
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: find_busiest_group divide error
2014-07-16 21:31 ` Dietmar Eggemann
@ 2014-07-16 21:47 ` Greg Donald
0 siblings, 0 replies; 6+ messages in thread
From: Greg Donald @ 2014-07-16 21:47 UTC (permalink / raw)
To: Dietmar Eggemann; +Cc: linux-kernel, Peter Zijlstra, Ingo Molnar
[-- Attachment #1: Type: text/plain, Size: 3343 bytes --]
On Wed, Jul 16, 2014 at 11:31:02PM +0200, Dietmar Eggemann wrote:
> My patch caffcdd8d27ba78730d5540396ce72ad022aff2c got rid of
> cpumask_clear(sched_group_cpus(sg)); and sg->sgp->power = 0; so
> reverting it (and replacing sg->sgp->power = 0 with
> sg->sgc->capacity = 0) should cure it too. (although the missing
> cpumask_clear() is the culprit on your machine here).
>
> Could I ask you to share the content of your /proc/cpuinfo file? I
> suspect it might be the same topology as the one Bruno just sent out
> (the one of a dual single core CPU with hyper-threading ?)
>
> https://lkml.org/lkml/2014/7/16/603
Sounds like what I have:
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.00GHz
stepping : 7
microcode : 0x25
cpu MHz : 1993.502
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fdiv_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs
bts cid
bogomips : 3987.00
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 32 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.00GHz
stepping : 7
microcode : 0x25
cpu MHz : 1993.502
cache size : 512 KB
physical id : 3
siblings : 2
core id : 0
cpu cores : 1
apicid : 6
initial apicid : 6
fdiv_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs
bts cid
bogomips : 3987.39
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 32 bits virtual
power management:
processor : 2
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.00GHz
stepping : 7
microcode : 0x25
cpu MHz : 1993.502
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 1
initial apicid : 1
fdiv_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs
bts cid
bogomips : 3987.34
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 32 bits virtual
power management:
processor : 3
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.00GHz
stepping : 7
microcode : 0x25
cpu MHz : 1993.502
cache size : 512 KB
physical id : 3
siblings : 2
core id : 0
cpu cores : 1
apicid : 7
initial apicid : 7
fdiv_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs
bts cid
bogomips : 3987.42
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 32 bits virtual
power management:
--
Greg Donald
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 473 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-07-16 21:47 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-07-14 16:56 find_busiest_group divide error Greg Donald
2014-07-16 15:27 ` Peter Zijlstra
2014-07-16 16:40 ` Bruno Wolff III
2014-07-16 17:52 ` Greg Donald
2014-07-16 21:31 ` Dietmar Eggemann
2014-07-16 21:47 ` Greg Donald
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