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SubjectRE: NVMe Poll CQ on timeout
Date
Hi,

Does anyone have any inputs ?

Regards,
Bharat

> Hi,
>
> We are testing NVMe cards on ARM64 platform, the card uses legacy
> interrupts.
> Intermittently 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_HANDLED;
> }
>
> Can anyone tell when does nvme_timeout gets invoked ?
> What does "Did we miss an interrupt mean" ? Does it mean host missing to
> service a interrupt raised by EP card ?
>
> Regards,
> Bharat
>

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