On 03/30/2018 12:32 PM, Yi Zhang wrote:
Hello
I got this kernel BUG on 4.16.0-rc7, here is the reproducer and log, let me know if you need more info, thanks.
Reproducer:
1. setup target
#nvmetcli restore /etc/rdma.json
2. connect target on host
#nvme connect-all -t rdma -a $IP -s 4420during my NVMeoF RDMA testing
3. do fio background on host
#fio -filename=/dev/nvme0n1 -iodepth=1 -thread -rw=randwrite -ioengine=psync -bssplit=5k/10:9k/10:13k/10:17k/10:21k/10:25k/10:29k/10:33k/10:37k/10:41k/10 -bs_unaligned -runtime=180 -size=-group_reporting -name=mytest -numjobs=60 &
4. offline cpu on host
#echo 0 > /sys/devices/system/cpu/cpu1/online
#echo 0 > /sys/devices/system/cpu/cpu2/online
#echo 0 > /sys/devices/system/cpu/cpu3/online
5. clear target
#nvmetcli clear
6. restore target
#nvmetcli restore /etc/rdma.json
7. check console log on host
Hi Yi,
Does this happen with this applied?
--
diff --git a/block/blk-mq-rdma.c b/block/blk-mq-rdma.c
index 996167f1de18..b89da55e8aaa 100644
--- a/block/blk-mq-rdma.c
+++ b/block/blk-mq-rdma.c
@@ -35,6 +35,8 @@ int blk_mq_rdma_map_queues(struct blk_mq_tag_set *set,
const struct cpumask *mask;
unsigned int queue, cpu;
+ goto fallback;
+
for (queue = 0; queue < set->nr_hw_queues; queue++) {
mask = ib_get_vector_affinity(dev, first_vec + queue);
if (!mask)
--
