From: axboe@fb.com (Jens Axboe)
Subject: [PATCH/RFC] NVMe: add support for doing offline/online of attached namespaces
Date: Fri, 23 Jan 2015 10:46:19 -0700 [thread overview]
Message-ID: <54C288EB.5020506@fb.com> (raw)
In-Reply-To: <20150123174457.GA12539@infradead.org>
On 01/23/2015 10:44 AM, Christoph Hellwig wrote:
> On Fri, Jan 23, 2015@10:39:38AM -0700, Jens Axboe wrote:
>> For the per dev host/sdev busy counters, those could be further improved if
>> they turn out to be a problem. I've got various "things" here that'll do
>> 1-2M IOPS per dev, so some test/profiling would not be a problem to do.
>
> We've tested up to 3M IOPS and it wasn't an issue, but none of these
> systems had more than two sockets.
I've got an older 4 socket here that loves to prove these are issues :-)
>> First issue is support for > 1 hw queue in SCSI, though.
>
> We've added > 1 queue support for virtio-scsi and srp, but most HBAs lack
> the hardware support for it.
Is that queued up for 3.20?
--
Jens Axboe
next prev parent reply other threads:[~2015-01-23 17:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-23 15:24 [PATCH/RFC] NVMe: add support for doing offline/online of attached namespaces Jens Axboe
2015-01-23 17:11 ` Christoph Hellwig
2015-01-23 17:24 ` Jens Axboe
2015-01-23 17:31 ` Christoph Hellwig
2015-01-23 17:39 ` Jens Axboe
2015-01-23 17:44 ` Christoph Hellwig
2015-01-23 17:46 ` Jens Axboe [this message]
2015-01-23 17:51 ` Christoph Hellwig
2015-01-23 17:52 ` Jens Axboe
2015-01-27 20:59 ` Keith Busch
2015-01-28 16:13 ` Jens Axboe
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