Comment 47 for bug 1413540

I have been trying to verify this kernel and I haven't seen exactly the soft lockup crash, but this other one, which may or may not be related but wanted to make a note of it:

[ 2406.041444] Kernel panic - not syncing: hung_task: blocked tasks
[ 2406.043163] CPU: 1 PID: 35 Comm: khungtaskd Not tainted 3.13.0-51-generic #84-Ubuntu
[ 2406.044223] Hardware name: OpenStack Foundation OpenStack Nova, BIOS Bochs 01/01/2011
[ 2406.044223] 00000000003fffd1 ffff88080ec7fdf0 ffffffff817225ce ffffffff81a62a65
[ 2406.044223] ffff88080ec7fe68 ffffffff8171b46d ffffffff00000008 ffff88080ec7fe78
[ 2406.044223] ffff88080ec7fe18 ffff88080ec7fe40 0000000000000100 0000000000000004
[ 2406.044223] Call Trace:
[ 2406.044223] [<ffffffff817225ce>] dump_stack+0x45/0x56
[ 2406.044223] [<ffffffff8171b46d>] panic+0xc8/0x1d7
[ 2406.044223] [<ffffffff8110d7b6>] watchdog+0x296/0x2e0
[ 2406.044223] [<ffffffff8110d520>] ? reset_hung_task_detector+0x20/0x20
[ 2406.044223] [<ffffffff8108b5d2>] kthread+0xd2/0xf0
[ 2406.044223] [<ffffffff8108b500>] ? kthread_create_on_node+0x1c0/0x1c0
[ 2406.044223] [<ffffffff8173300c>] ret_from_fork+0x7c/0xb0
[ 2406.044223] [<ffffffff8108b500>] ? kthread_create_on_node+0x1c0/0x1c0

I have the crashdump for it, let me know how you want to proceed.