Messages in this thread | | | From | Bharat Kumar Gogada <> | Subject | NVMe Poll CQ on timeout | Date | Thu, 19 Sep 2019 13:47:50 +0000 |
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Hi All,
We are testing NVMe cards on ARM64 platform, the card uses MSI-X interrupts. We are hitting following case in drivers/nvme/host/pci.c /* * Did we miss an interrupt? */ if (__nvme_poll(nvmeq, req->tag)) { dev_warn(dev->ctrl.device, "I/O %d QID %d timeout, completion polled\n", req->tag, nvmeq->qid); return BLK_EH_DONE; }
Can anyone tell when does nvme_timeout gets invoked ? In what cases we see this interrupt miss ?
We are seeing this issue only for reads with following fio command fio --name=randwrite --ioengine=libaio --iodepth=1 --rw=randread --bs=128k --direct=0 \ --size=128M --numjobs=3 --group_reporting --filename=/dev/nvme0n1
We are not seeing issue with --rw=randwrite for same size.
Please let us know what can cause this issue.
Regards, Bharat
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