Greetings, I got the below dmesg and the first bad commit is https://github.com/alexshi/power-scheduling.git commit 297c7d37bfd076cb8f0980b3ab6e57d9f3479d3c Author: Alex Shi AuthorDate: Mon Feb 3 22:30:06 2014 +0800 Commit: Alex Shi CommitDate: Mon Feb 3 22:30:06 2014 +0800 sched: panda board has no llc sd, so do a redundant check for this +-------------------------------------------------------+--------------+--------------+ | | 80f550e10e1c | 297c7d37bfd0 | +-------------------------------------------------------+--------------+--------------+ | boot_successes | 60 | 0 | | boot_failures | 1 | 19 | | BUG:kernel_test_hang | 1 | | | general_protection_fault:SMP | 0 | 19 | | RIP:run_balance_system | 0 | 19 | | Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 0 | 19 | +-------------------------------------------------------+--------------+--------------+ [ 0.316014] smpboot: Total of 2 processors activated (6400.25 BogoMIPS) [ 0.324020] KVM setup async PF for cpu 1 [ 0.328000] kvm-stealtime: cpu 1, msr 1fd0d040 [ 0.336022] general protection fault: 0000 [#1] SMP [ 0.340000] Modules linked in: [ 0.340000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.14.0-rc1-00018-g297c7d3 #5 [ 0.340000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 0.340000] task: ffffffff82211440 ti: ffffffff82200000 task.ti: ffffffff82200000 [ 0.340000] RIP: 0010:[] [] run_balance_system+0x1cb/0x27f [ 0.340000] RSP: 0000:ffff88001fc03df0 EFLAGS: 00010206 [ 0.340000] RAX: 0000ffff00013000 RBX: ffff88001fc0d380 RCX: 0000000000000000 [ 0.340000] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff824f01f0 [ 0.340000] RBP: ffff88001fc03f18 R08: ffff88001fc0d3c0 R09: 0000000000000101 [ 0.340000] R10: 0000000000000001 R11: 000000000000b59c R12: ffff88001fc03df0 [ 0.340000] R13: 0000000000000200 R14: 0000000000000002 R15: 000000000000d2e8 [ 0.340000] FS: 0000000000000000(0000) GS:ffff88001fc00000(0000) knlGS:0000000000000000 [ 0.340000] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 0.340000] CR2: 00000000ffffffff CR3: 000000000220c000 CR4: 00000000000006f0 [ 0.340000] Stack: [ 0.340000] 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 0.340000] 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 0.340000] 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 0.340000] Call Trace: [ 0.340000] [ 0.340000] [] ? kvm_clock_read+0x27/0x31 [ 0.340000] [] ? run_timer_softirq+0x1e4/0x238 [ 0.340000] [] __do_softirq+0x121/0x2b7 [ 0.340000] [] irq_exit+0x4a/0xa0 [ 0.340000] [] smp_apic_timer_interrupt+0x44/0x50 [ 0.340000] [] apic_timer_interrupt+0x72/0x80 [ 0.340000] [ 0.340000] [] ? native_safe_halt+0x6/0x8 [ 0.340000] [] default_idle+0x38/0xc1 [ 0.340000] [] arch_cpu_idle+0x18/0x28 [ 0.340000] [] cpu_startup_entry+0x131/0x20a [ 0.340000] [] rest_init+0x87/0x89 [ 0.340000] [] start_kernel+0x407/0x412 [ 0.340000] [] ? repair_env_string+0x58/0x58 [ 0.340000] [] ? early_idt_handlers+0x120/0x120 [ 0.340000] [] x86_64_start_reservations+0x2a/0x2c [ 0.340000] [] x86_64_start_kernel+0x13b/0x148 [ 0.340000] Code: ff ff 41 ff c6 eb d2 48 c7 c2 c0 01 4f 82 31 c0 b9 0c 00 00 00 48 89 d7 31 d2 f3 ab 48 c7 c0 00 30 01 00 4a 03 04 ed 40 e5 32 82 <48> 8b 80 80 08 00 00 48 85 c0 74 06 f6 40 3c 01 75 0d 48 89 15 [ 0.340000] RIP [] run_balance_system+0x1cb/0x27f [ 0.340000] RSP [ 0.340019] ---[ end trace 443bf419261ef47a ]--- [ 0.344010] Kernel panic - not syncing: Fatal exception in interrupt git bisect start 297c7d37bfd076cb8f0980b3ab6e57d9f3479d3c 38dbfb59d1175ef458d006556061adeaa8751b72 -- git bisect good 80f550e10e1c6a027d9df7eef7aee7aaefc7e76e # 21:42 20+ 0 sched: remove un-used functions # first bad commit: [297c7d37bfd076cb8f0980b3ab6e57d9f3479d3c] sched: panda board has no llc sd, so do a redundant check for this git bisect good 80f550e10e1c6a027d9df7eef7aee7aaefc7e76e # 00:24 60+ 0 sched: remove un-used functions git bisect bad 297c7d37bfd076cb8f0980b3ab6e57d9f3479d3c # 00:24 0- 19 sched: panda board has no llc sd, so do a redundant check for this git bisect good 38dbfb59d1175ef458d006556061adeaa8751b72 # 00:45 60+ 2 Linus 3.14-rc1 git bisect good cdd263faccc2184e685573968dae5dd34758e322 # 00:45 790+ 0 Add linux-next specific files for 20140204 Thanks, Fengguang