Re: lockdep question (was Re: IPoIB caused a kernel: BUG: soft lockup detected on CPU#0!)
From: Michael S. Tsirkin
Date: Sun Mar 11 2007 - 11:35:41 EST
After adding some printks, I started getting these:
[ 597.036720] BUG: MAX_STACK_TRACE_ENTRIES too low!
[ 597.041546] turning off the locking correctness validator.
[ 597.047135] [<c023a922>] save_trace+0x8a/0x8f
[ 597.051751] [<c023ae8c>] mark_lock+0x65/0x3ff
[ 597.056366] [<c023a8d6>] save_trace+0x3e/0x8f
[ 597.060980] [<c023a9f0>] add_lock_to_list+0x62/0x85
[ 597.066116] [<c023b992>] __lock_acquire+0x3f4/0xbb9
[ 597.071252] [<f89da11f>] send_mad+0x79/0x103 [ib_sa]
[ 597.076474] [<c031a475>] idr_get_new_above_int+0x13c/0x216
[ 597.082225] [<c023c43d>] lock_acquire+0x56/0x71
[ 597.087018] [<f89da11f>] send_mad+0x79/0x103 [ib_sa]
[ 597.092240] [<c051ad41>] _spin_lock_irqsave+0x32/0x41
[ 597.097547] [<f89da11f>] send_mad+0x79/0x103 [ib_sa]
[ 597.102770] [<f89da11f>] send_mad+0x79/0x103 [ib_sa]
[ 597.107989] [<f89da8d9>] ib_sa_path_rec_get+0x134/0x172 [ib_sa]
[ 597.114166] [<f899b73f>] path_rec_start+0x115/0x143 [ib_ipoib]
[ 597.120254] [<f899cb38>] path_rec_completion+0x0/0x4f4 [ib_ipoib]
[ 597.126610] [<f899b874>] path_rec_create+0x77/0x9d [ib_ipoib]
[ 597.132617] [<f899c9fe>] ipoib_start_xmit+0x441/0x57b [ib_ipoib]
[ 597.138888] [<c051ae06>] _spin_unlock_irqrestore+0x34/0x39
[ 597.144635] [<c023b435>] trace_hardirqs_on+0x106/0x141
[ 597.150035] [<c04a058b>] dev_queue_xmit+0x109/0x245
[ 597.155167] [<c022ae27>] __mod_timer+0x94/0x9e
[ 597.159871] [<c04a0423>] dev_hard_start_xmit+0x1be/0x21d
[ 597.165438] [<c04a9fa9>] __qdisc_run+0xd7/0x190
[ 597.170226] [<c04a05b7>] dev_queue_xmit+0x135/0x245
[ 597.175360] [<c04ce267>] arp_process+0x2c0/0x512
[ 597.180234] [<f8954346>] mthca_tavor_interrupt+0xf3/0x12b [ib_mthca]
[ 597.186855] [<c04a088b>] netif_receive_skb+0x1c4/0x1da
[ 597.192254] [<c023b435>] trace_hardirqs_on+0x106/0x141
[ 597.197648] [<c04a0935>] process_backlog+0x94/0x107
[ 597.202785] [<c049f02b>] net_rx_action+0x9a/0x15e
[ 597.207743] [<c0227643>] __do_softirq+0x69/0xd5
[ 597.212530] [<c02276e6>] do_softirq+0x37/0x4d
[ 597.217147] [<c020617e>] do_IRQ+0x5c/0x72
[ 597.221415] [<c0204b52>] common_interrupt+0x2e/0x34
[ 597.226549] [<c02029ef>] default_idle+0x3b/0x54
[ 597.231337] [<c02029f1>] default_idle+0x3d/0x54
[ 597.236124] [<c0202aaa>] cpu_idle+0xa2/0xbb
[ 597.240567] =======================
And sometimes these:
[ 404.493572] KERNEL: assertion (!timer_pending(&dev->watchdog_timer)) failed at net/sched/sch_generic.c (608)
--
MST
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