From: Bharat Kumar Gogada <bharatku@xilinx.com>
To: "linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: "keith.busch@intel.com" <keith.busch@intel.com>,
"hch@lst.de" <hch@lst.de>, "axboe@fb.com" <axboe@fb.com>
Subject: RE: NVMe Poll CQ on timeout
Date: Mon, 7 May 2018 06:57:54 +0000 [thread overview]
Message-ID: <BLUPR0201MB1505FC0425F87A1A8E6E50DAA59B0@BLUPR0201MB1505.namprd02.prod.outlook.com> (raw)
In-Reply-To: <BLUPR0201MB1505A10C31E4E3A3BDF7BDBAA58E0@BLUPR0201MB1505.namprd02.prod.outlook.com>
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
>
next prev parent reply other threads:[~2018-05-07 6:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-26 14:59 NVMe Poll CQ on timeout Bharat Kumar Gogada
2018-05-07 6:57 ` Bharat Kumar Gogada [this message]
2018-05-07 16:02 ` Keith Busch
2018-05-15 13:58 ` Bharat Kumar Gogada
2019-09-19 13:47 Bharat Kumar Gogada
2019-09-19 14:13 ` Keith Busch
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