Hi Andi, I just got this with Linus's -git updated as of this morning
(head is 95f3eff6997ae4a6754c1d874ec0a414d97c44d1). The soft lockup
is a bug in code I was testing but I was only touching drivers/infiniband,
so it shouldn't make a difference for this.
Let me know if there's any more info you need.
[ 971.926760] BUG: soft lockup detected on CPU#0!
[ 971.940287]
[ 971.940288] Call Trace:
[ 971.952076] [<ffffffff8026018f>] show_trace+0x34/0x47
[ 971.967433] [<ffffffff802601b4>] dump_stack+0x12/0x17
[ 971.982793] [<ffffffff80294a10>] softlockup_tick+0xdb/0xed
[ 971.999517] [<ffffffff8027e49e>] update_process_times+0x42/0x68
[ 972.017521] [<ffffffff802677d0>] smp_local_timer_interrupt+0x23/0x47
[ 972.036770] [<ffffffff80267c7a>] smp_apic_timer_interrupt+0x38/0x3e
[ 972.055761] [<ffffffff80254ce6>] apic_timer_interrupt+0x66/0x70
[ 972.073697] DWARF2 unwinder stuck at apic_timer_interrupt+0x66/0x70
[ 972.092424]
[ 972.096886] Leftover inexact backtrace:
[ 972.096887]
[ 972.112815] <IRQ> [<ffffffff802596dc>] _spin_unlock_irqrestore+0x8/0x9
[ 972.132905] [<ffffffff880a628e>] :ib_ipath:ipath_req_notify_cq+0x4b/0x55
[ 972.153190] [<ffffffff88227e02>] :ib_ipoib:ipoib_poll+0x4a0/0x540
[ 972.171661] [<ffffffff8020b4c1>] net_rx_action+0xa4/0x161
[ 972.188056] [<ffffffff8020f953>] __do_softirq+0x55/0xc4
[ 972.203933] [<ffffffff80316df1>] end_msi_irq_wo_maskbit+0x9/0x16
[ 972.222146] [<ffffffff8025523c>] call_softirq+0x1c/0x30
[ 972.238023] [<ffffffff8026116a>] do_softirq+0x2c/0x7e
[ 972.253382] [<ffffffff80261135>] do_IRQ+0x61/0x6a
[ 972.267703] [<ffffffff8025fa18>] default_idle+0x0/0x47
[ 972.283321] [<ffffffff80254631>] ret_from_intr+0x0/0xa
[ 972.298938] <EOI> [<ffffffff8025fa41>] default_idle+0x29/0x47
[ 972.316688] [<ffffffff802418a4>] cpu_idle+0x50/0x6f
[ 972.331525] [<ffffffff80520682>] start_kernel+0x211/0x216
[ 972.347924] [<ffffffff8052015a>] _sinittext+0x15a/0x15e
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