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Hi, I am facing crash/hang with 2.6.32.60 Kernel (64bit). My maxcpus (CONFIG_NR_CPUS) count is 64 and below is the call trace. I see log saying “BUG: spinlock lockup on CPU#74”. Is it a known bug? If its fixed let me know the patch. Any
pointers really appreciated. Please note, if I change maxcpus=8 kernel boots successfully. Thanks Giri [Jan 26 06:41:35.439] [ 67.606000] Non-volatile memory driver v1.3^M [ 67.616000] Linux agpgart interface v0.103^M [ 67.637000] [drm] Initialized drm 1.1.0 20060810^M [ 67.652000] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled^M [ 68.092000] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A^M [Jan 26 06:41:36.679] [ 68.846000] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A^M [ 68.910000] 00:03: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A^M [Jan 26 06:41:37.149] [ 69.316000] brd: module loaded^M [Jan 26 06:41:41.015] [ 73.183000] loop: module loaded^M [ 73.191000] lkdtm : Invalid command^M [ 73.200000] kgdb: Registered I/O driver kgdbts.^M [Jan 26 06:42:03.435] [ 73.552000] BUG: spinlock lockup on CPU#74, swapper/1, ffff880c9c1d2ac0^M
ç===== [ 73.552000] Pid: 1, comm: swapper Not tainted 2.6.32.60 #2^M [ 73.552000] Call Trace:^M [ 73.552000] <IRQ> [<ffffffff81196df0>] _raw_spin_lock+0x103/0x12b^M [ 73.552000] [<ffffffff81459c97>] _spin_lock+0x4f/0x62^M [ 73.552000] [<ffffffff8103c1a3>] ? scheduler_tick+0x49/0x166^M [ 73.552000] [<ffffffff8103c1a3>] scheduler_tick+0x49/0x166^M [ 73.552000] [<ffffffff8104e6de>] update_process_times+0x42/0x52^M [ 73.552000] [<ffffffff81061ef1>] tick_periodic+0x63/0x65^M [ 73.552000] [<ffffffff81061f11>] tick_handle_periodic+0x1e/0x6b^M [ 73.552000] [<ffffffff8101eb91>] smp_apic_timer_interrupt+0x84/0x97^M [ 73.552000] [<ffffffff8100c773>] apic_timer_interrupt+0x13/0x20^M [ 73.552000] <EOI> [<ffffffff8126a8a5>] ? kgdbts_break_test+0x1/0x22^M [ 73.552000] [<ffffffff8126a8a4>] ? kgdbts_break_test+0x0/0x22^M [ 73.552000] [<ffffffff8126b7d4>] ? configure_kgdbts+0x1ef/0x4bb^M [ 73.552000] [<ffffffff81177ade>] ? blk_register_region+0x28/0x2a^M [ 73.552000] [<ffffffff81b50f4c>] ? init_kgdbts+0x0/0x16^M [ 73.552000] [<ffffffff81b50f60>] ? init_kgdbts+0x14/0x16^M [ 73.552000] [<ffffffff8100905d>] ? do_one_initcall+0x57/0x157^M [ 73.552000] [<ffffffff81b24d88>] ? kernel_init+0x1f0/0x241^M [ 73.552000] [<ffffffff8100cc7a>] ? child_rip+0xa/0x20^M [ 73.552000] [<ffffffff8100c63c>] ? restore_args+0x0/0x30^M [ 73.552000] [<ffffffff81b24b98>] ? kernel_init+0x0/0x241^M [ 73.552000] [<ffffffff8100cc70>] ? child_rip+0x0/0x20^M [ 73.552000] sending NMI to all CPUs:^M [ 73.552000] NMI backtrace for cpu 74^M [ 73.552000] CPU 74:^M [ 73.552000] Modules linked in:^M [ 73.552000] Pid: 1, comm: swapper Not tainted 2.6.32.60 #2 UCSB-B420-M3^M [ 73.552000] RIP: 0010:[<ffffffff81187fa0>] [<ffffffff81187fa0>] delay_loop+0x20/0x2a^M [ 73.552000] RSP: 0018:ffff880c9c003da8 EFLAGS: 00000002^M [ 73.552000] RAX: 000000000001d185 RBX: 0000000000000000 RCX: 0000000000000030^M [ 73.552000] RDX: 000000000001d19a RSI: 0000000000000010 RDI: 000000000001d19b^M [ 73.552000] RBP: ffff880c9c003da8 R08: 000000000000000b R09: ffffffff81947ad0^M [ 73.552000] R10: 000000000000b4a0 R11: ffffffff81878da0 R12: 0000000000001000^M [ 73.552000] R13: 0000000000000092 R14: 0000000000000002 R15: ffffffff81947ac0^M [ 73.552000] FS: 0000000000000000(0000) GS:ffff880c9c000000(0000) knlGS:0000000000000000^M [ 73.552000] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b^M [ 73.552000] CR2: 0000000000000000 CR3: 0000000001001000 CR4: 00000000000406e0^M [ 73.552000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000000000 [Jan 26 06:42:04.041] 0000^M [ 73.552000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400^M [ 73.552000] Call Trace:^M [ 73.552000] <#DB[1]> <<EOE>> Pid: 1, comm: swapper Not tainted 2.6.32.60 #2^M [ 73.552000] Call Trace:^M [ 73.552000] <NMI> [<ffffffff8145b99d>] nmi_watchdog_tick+0x111/0x24d^M [ 73.552000] [<ffffffff8145aee1>] do_nmi+0xbd/0x269^M [ 73.552000] [<ffffffff8145ab1a>] nmi+0x1a/0x2c^M [ 73.552000] [<ffffffff81187fa0>] ? delay_loop+0x20/0x2a^M [ 73.552000] <<EOE>> <IRQ> [<ffffffff81188001>] __delay+0xa/0xc^M [ 73.552000] [<ffffffff8118803f>] __const_udelay+0x3c/0x3e^M [ 73.552000] [<ffffffff8101e898>] native_safe_apic_wait_icr_idle+0x31/0x44^M [ 73.552000] [<ffffffff8101f479>] default_send_IPI_mask_sequence_phys+0x49/0x110^M [ 73.552000] [<ffffffff810225f4>] physflat_send_IPI_mask+0x9/0xb^M [ 73.552000] [<ffffffff8102262b>] physflat_send_IPI_all+0x14/0x16^M [ 73.552000] [<ffffffff8101f8e6>] arch_trigger_all_cpu_backtrace+0x4e/0x7c^M [ 73.552000] [<ffffffff81196df5>] _raw_spin_lock+0x108/0x12b^M [ 73.552000] [<ffffffff81459c97>] _spin_lock+0x4f/0x62^M [ 73.552000] [<ffffffff8103c1a3>] ? scheduler_tick+0x49/0x166^M [ 73.552000] [<ffffffff8103c1a3>] scheduler_tick+0x49/0x166^M [ 73.552000] [<ffffffff8104e6de>] update_process_times+0x42/0x52^M [ 73.552000] [<ffffffff81061ef1>] tick_periodic+0x63/0x65^M [ 73.552000] [<ffffffff81061f11>] tick_handle_periodic+0x1e/0x6b^M [ 73.552000] [<ffffffff8101eb91>] smp_apic_timer_interrupt+0x84/0x97^M [ 73.552000] [<ffffffff8100c773>] apic_timer_interrupt+0x13/0x20^M [ 73.552000] <EOI> [<ffffffff8126a8a5>] ? kgdbts_break_test+0x1/0x22^M [ 73.552000] [<ffffffff8126a8a4>] ? kgdbts_break_test+0x0/0x22^M [ 73.552000] [<ffffffff8126b7d4>] ? configure_kgdbts+0x1ef/0x4bb^M [ 73.552000] [<ffffffff81177ade>] ? blk_register_region+0x28/0x2a^M [ 73.552000] [<ffffffff81b50f4c>] ? init_kgdbts+0x0/0x16^M [ 73.552000] [<ffffffff81b50f60>] ? init_kgdbts+0x14/0x16^M [ 73.552000] [<ffffffff8100905d>] ? do_one_initcall+0x57/0x157^M [ 73.552000] [<ffffffff81b24d88>] ? kernel_init+0x1f0/0x241^M [ 73.552000] [<ffffffff8100cc7a>] ? child_rip+0xa/0x20^M [ 73.552000] [<ffffffff8100c63c>] ? restore_args+0x0/0x30^M [ 73.552000] [<ffffffff81b24b98>] ? kernel_init+0x0/0x241^M [ 73.552000] [<ffffffff8100cc70>] ? child_rip+0x0/0x20^M |
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