From: willy@linux.intel.com (Matthew Wilcox)
Subject: [PATCH 2/4] nvme: don't poll the CQ from the kthread
Date: Mon, 29 Feb 2016 15:56:07 -0500 [thread overview]
Message-ID: <20160229205607.GC3730@linux.intel.com> (raw)
In-Reply-To: <1456757987-7244-3-git-send-email-hch@lst.de>
On Mon, Feb 29, 2016@03:59:45PM +0100, Christoph Hellwig wrote:
> There is no reason to do unconditional polling of CQs per the NVMe
> spec.
Sure, per the spec there isn't. But in reality, devices ship with
broken interrupt support. What's your plan for dealing with the bug
reports from users who have misconfigured MSI support or IRQ lines that
are routed to the wrong place? From my time maintaining SCSI drivers,
this wasn't an uncommon bug report.
next prev parent reply other threads:[~2016-02-29 20:56 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-29 14:59 roolup of my pending NVMe patches for 4.6 Christoph Hellwig
2016-02-29 14:59 ` [PATCH 1/4] nvme: use a work item to submit async event requests Christoph Hellwig
2016-02-29 14:59 ` [PATCH 2/4] nvme: don't poll the CQ from the kthread Christoph Hellwig
2016-02-29 20:56 ` Matthew Wilcox [this message]
2016-03-01 8:49 ` Christoph Hellwig
2016-02-29 14:59 ` [PATCH 3/4] nvme: replace the kthread with a per-device watchdog timer Christoph Hellwig
2016-02-29 14:59 ` [PATCH 4/4] nvme: return the whole CQE through the request passthrough interface Christoph Hellwig
2016-02-29 15:42 ` Keith Busch
2016-02-29 15:47 ` roolup of my pending NVMe patches for 4.6 Jens Axboe
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