Hello,
We are working on a cluster file system using fcoe vn2vn. Multiple
initiators can see the same set of target hard drives exported by
targetcli tcm_fc. When the initiators run IO to these target hard
drives at the same time, target system crashes no matter using iblock
backstore or pscsi backstore. See the following dump.
crash> bt
PID: 318 TASK: ffff880c1a05aee0 CPU: 5 COMMAND: "kworker/5:1"
#0 [ffff880c1a895a48] machine_kexec at ffffffff810485e2
#1 [ffff880c1a895a98] crash_kexec at ffffffff810d09d3
#2 [ffff880c1a895b60] oops_end at ffffffff816f0c98
#3 [ffff880c1a895b88] die at ffffffff8101616b
#4 [ffff880c1a895bb8] do_trap at ffffffff816f04b0
#5 [ffff880c1a895c08] do_invalid_op at ffffffff810134a8
#6 [ffff880c1a895cb0] invalid_op at ffffffff816f9c1e
[exception RIP: ft_queue_data_in+1386]
RIP: ffffffffa0641eda RSP: ffff880c1a895d68 RFLAGS: 00010246
RAX: 0000000000001000 RBX: ffff880c17a6dc10 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffff880c1afa36d8 RDI: 0000000000000000
RBP: ffff880c1a895df8 R8: ffff880c1667e45c R9: dfcf2970a166dd90
R10: dfcf2970a166dd90 R11: 0000000000000000 R12: ffff880c17a6dc10
R13: ffff880c3fc33e00 R14: 0000000000001000 R15: 0000000000000140
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#7 [ffff880c1a895d60] ft_queue_data_in at ffffffffa06419c7 [tcm_fc]
#8 [ffff880c1a895e00] target_complete_ok_work at ffffffffa04ded21
[target_core_
mod]
#9 [ffff880c1a895e28] process_one_work at ffffffff8107d0ec
#10 [ffff880c1a895e70] worker_thread at ffffffff8107dd3c
#11 [ffff880c1a895ed0] kthread at ffffffff810848d0
#12 [ffff880c1a895f50] ret_from_fork at ffffffff816f836c
Is there any way to avoid this problem?
Thanks,
Jun
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