From: axboe@fb.com (Jens Axboe)
Subject: [PATCH] NVMe: Set queue max segments
Date: Mon, 17 Aug 2015 15:51:55 -0600 [thread overview]
Message-ID: <55D2577B.9020905@fb.com> (raw)
In-Reply-To: <1439417874-8925-1-git-send-email-keith.busch@intel.com>
On 08/12/2015 04:17 PM, Keith Busch wrote:
> This sets the queue's max segment size to match the device's
> capabilities. The default of 128 is usable until a device's transfer
> capability exceeds 512k, assuming a device page size of 4k. Many nvme
> devices exceed that transfer limit, so this lets the block layer know what
> kind of commands it to allow to form rather than unnecessarily split them.
>
> One additional segment is added to account for a transfer that may start
> in the middle of a page.
Applied for 4.3.
--
Jens Axboe
prev parent reply other threads:[~2015-08-17 21:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-12 22:17 [PATCH] NVMe: Set queue max segments Keith Busch
2015-08-13 6:38 ` Christoph Hellwig
2015-08-13 13:52 ` Keith Busch
2015-08-17 19:12 ` Christoph Hellwig
2015-08-17 21:51 ` Jens Axboe [this message]
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