[27336.007233] [<ffffffff81089fc3>] kswapd+0xb3/0x250
[27336.007237] [<ffffffff8104fea0>] ? abort_exclusive_wait+0xb0/0xb0
[27336.007241] [<ffffffff81089f10>] ? balance_pgdat+0x6a0/0x6a0
[27336.007244] [<ffffffff8104f457>] kthread+0x87/0x90
[27336.007248] [<ffffffff81648814>] kernel_thread_helper+0x4/0x10
[27336.007252] [<ffffffff8104f3d0>] ? kthread_flush_work_fn+0x10/0x10
[27336.007256] [<ffffffff81648810>] ? gs_change+0xb/0xb
No more info got.
Could you try to make a test case which can trigger this bug reliably?
You may also try some benchmarks, for example, fio, ffsb, etc.
Lin Ming