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: NVMe Poll CQ on timeout
Date: Thu, 26 Apr 2018 14:59:06 +0000 [thread overview]
Message-ID: <BLUPR0201MB1505A10C31E4E3A3BDF7BDBAA58E0@BLUPR0201MB1505.namprd02.prod.outlook.com> (raw)
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 reply other threads:[~2018-04-26 14:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-26 14:59 Bharat Kumar Gogada [this message]
2018-05-07 6:57 ` NVMe Poll CQ on timeout Bharat Kumar Gogada
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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