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    SubjectRe: clockevents_program_event WARN_ON preventing boot.
    From
    On Thu, May 2, 2013 at 8:46 AM, Dave Jones <davej@redhat.com> wrote:
    > On Thu, May 02, 2013 at 12:37:26PM +0200, Thomas Gleixner wrote:
    >
    > > > On a second machine, I'm seeing an oops even earlier. As soon as I
    > > > exit grub, I get a blinking cursor. If I boot with earlyprintk=vga
    > > > I can see..
    > > >
    > > > Call Trace:
    > > > <IRQ>
    > > > tick_check_oneshot_broadcast
    > > > tick_check_idle
    > > > irq_enter
    > > > do_IRQ
    > > > common_interrupt
    > > > <EOI>
    > > > x86_64_start_reservations
    > > > x86_64_start_kernel
    > > > RIP: clockevents_set_mode+0x18
    > > >

    trace:
    [ 3.394328] ------------[ cut here ]------------
    [ 3.394346] WARNING: at kernel/time/clockevents.c:209
    clockevents_program_event+0x3b/0x100()
    [ 3.394349] Modules linked in:
    [ 3.394355] CPU: 10 PID: 0 Comm: swapper/10 Not tainted
    3.9.0-yh-07884-g14d850d-dirty #1534
    [ 3.394357] Hardware name: Oracle Corporation unknown /
    , BIOS 11016600 05/17/2011
    [ 3.394373] 0000000000000009 ffff88203e203ed8 ffffffff82091492
    ffff88203e203f18
    [ 3.394381] ffffffff81088990 ffff88203e203f08 80000000003d08ff
    80000000003d08ff
    [ 3.394389] 000000000000000a ffff8810275e7fd8 0000000000000000
    ffff88203e203f28
    [ 3.394390] Call Trace:
    [ 3.394405] <IRQ> [<ffffffff82091492>] dump_stack+0x19/0x1b
    [ 3.394415] [<ffffffff81088990>] warn_slowpath_common+0x70/0xa0
    [ 3.394419] [<ffffffff810889da>] warn_slowpath_null+0x1a/0x20
    [ 3.394422] [<ffffffff810e312b>] clockevents_program_event+0x3b/0x100
    [ 3.394427] [<ffffffff810e35ec>] tick_handle_periodic+0x4c/0x80
    [ 3.394434] [<ffffffff820aed4d>] smp_apic_timer_interrupt+0x8d/0xa3
    [ 3.394444] [<ffffffff820ae06f>] apic_timer_interrupt+0x6f/0x80
    [ 3.394453] <EOI> [<ffffffff810527f7>] ? default_idle+0x57/0xd0
    [ 3.394457] [<ffffffff810527f5>] ? default_idle+0x55/0xd0
    [ 3.394461] [<ffffffff81053078>] arch_cpu_idle+0x18/0x20
    [ 3.394465] [<ffffffff810dbec5>] cpu_startup_entry+0x165/0x210
    [ 3.394473] [<ffffffff8207f81d>] start_secondary+0x1df/0x1e6
    [ 3.394497] ---[ end trace d8b8ac23062f0bee ]---
    [ 3.660026] Initializing CPU#11
    [ 3.660229] CPU 11/26: logical apicid:00020040 in cluster 0002

    then panic with cpu 64.


    [ 10.253249] smpboot: CPU64: Intel(R) Xeon(R) CPU X7560 @
    2.27GHz (fam: 06, model: 2e, stepping: 06)
    [ 10.269640] checking TSC synchronization [CPU#0 -> CPU#64]: passed.
    [ 10.272017] BUG: unable to handle kernel NULL pointer dereference
    at 0000000000000048
    [ 10.289803] IP: [<ffffffff810e3c46>] tick_do_broadcast+0x86/0xa0
    [ 10.309535] PGD 0
    [ 10.309683] Oops: 0000 [#1] SMP
    [ 10.309885] Modules linked in:
    [ 10.310069] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W
    3.9.0-yh-07884-g14d850d-dirty #1534
    [ 10.340098] Hardware name: Oracle Corporation unknown /
    , BIOS 11016600 05/17/2011
    [ 10.359764] task: ffff8810274f0000 ti: ffff8810274ee000 task.ti:
    ffff8810274ee000
    [ 10.379412] RIP: 0010:[<ffffffff810e3c46>] [<ffffffff810e3c46>]
    tick_do_broadcast+0x86/0xa0
    [ 10.379871] RSP: 0000:ffff88103de03e68 EFLAGS: 00010002
    [ 10.399560] RAX: 0000000000000000 RBX: ffff88103d848000 RCX: 0000000000000002
    [ 10.399918] RDX: 0000000000000000 RSI: 0000000000000080 RDI: ffff88103d848000
    [ 10.419810] RBP: ffff88103de03e78 R08: 0000000000000040 R09: 0000000000000002
    [ 10.439551] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000d880
    [ 10.439918] R13: ffffffff82a20680 R14: 0000000000000000 R15: 0000000000000001
    [ 10.459717] FS: 0000000000000000(0000) GS:ffff88103de00000(0000)
    knlGS:0000000000000000
    [ 10.479545] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    [ 10.479853] CR2: 0000000000000048 CR3: 000000807ea14000 CR4: 00000000000007f0
    [ 10.499624] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    [ 10.519441] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    [ 10.519839] Stack:
    [ 10.519953] ffffffff82a20680 ffffffff82a2d6c0 ffff88103de03e88
    ffffffff810e3e41
    [ 10.539793] ffff88103de03ea8 ffffffff810e3e64 ffffffff82a20680
    0000000000000000
    [ 10.559593] ffff88103de03eb8 ffffffff8104cc55 ffff88103de03f08
    ffffffff81111b82
    [ 10.560012] Call Trace:
    [ 10.579490] <IRQ>
    [ 10.579588] [<ffffffff810e3e41>] tick_do_periodic_broadcast+0x41/0x50
    [ 10.579976] [<ffffffff810e3e64>] tick_handle_periodic_broadcast+0x14/0x60
    [ 10.599726] [<ffffffff8104cc55>] timer_interrupt+0x15/0x20
    [ 10.619453] [<ffffffff81111b82>] handle_irq_event_percpu+0x62/0x1e0
    [ 10.619787] [<ffffffff81111d48>] handle_irq_event+0x48/0x70
    [ 10.639517] [<ffffffff811147de>] ? handle_edge_irq+0x1e/0x130
    [ 10.639830] [<ffffffff811148b8>] handle_edge_irq+0xf8/0x130
    [ 10.659531] [<ffffffff8104c4c2>] handle_irq+0x22/0x40
    [ 10.659802] [<ffffffff820aec4a>] do_IRQ+0x5a/0xd0
    [ 10.679485] [<ffffffff820a4eaf>] common_interrupt+0x6f/0x6f
    [ 10.679769] <EOI>
    [ 10.679882] [<ffffffff810eb086>] ? mark_held_locks+0x136/0x150
    [ 10.699615] [<ffffffff8207fe7f>] ? native_cpu_up+0x5ad/0x62d
    [ 10.699958] [<ffffffff82081179>] _cpu_up+0xc0/0x133
    [ 10.719594] [<ffffffff820812c5>] cpu_up+0xd9/0xec
    [ 10.719860] [<ffffffff82db4239>] smp_init+0x76/0xa6
    [ 10.739553] [<ffffffff82d9423d>] kernel_init_freeable+0xcd/0x251
    [ 10.739879] [<ffffffff82074850>] ? rest_init+0xd0/0xd0
    [ 10.759555] [<ffffffff8207485e>] kernel_init+0xe/0xf0
    [ 10.759833] [<ffffffff820ad29c>] ret_from_fork+0x7c/0xb0
    [ 10.779528] [<ffffffff82074850>] ? rest_init+0xd0/0xd0
    [ 10.779779] Code: 85 c0 75 2a 48 63 35 5e f8 ac 01 48 89 df 49 c7
    c4 80 d8 00 00 e8 cb 50 41 00 89 c0 48 89 df 48 8b 04 c5 e0 74 ba 82
    4a 8b 04 20 <ff> 50 48 48 8b 5d f0 4c 8b 65 f8 c9 c3 66 66 66 66 2e 0f
    1f 84
    [ 10.819807] RIP [<ffffffff810e3c46>] tick_do_broadcast+0x86/0xa0
    [ 10.820147] RSP <ffff88103de03e68>
    [ 10.839550] CR2: 0000000000000048
    [ 10.839723] ---[ end trace d8b8ac23062f0bef ]---
    [ 10.839952] Kernel panic - not syncing: Fatal exception in interrupt
    [ 11.907579] Shutting down cpus with NMI


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