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From: Johannes Thumshirn <jthumshirn@suse.de>
To: Bryan Gurney <bgurney@redhat.com>,
	Linus Walleij <linus.walleij@linaro.org>
Cc: Jens Axboe <axboe@kernel.dk>,
	Christoph Hellwig <hch@infradead.org>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Paolo Valente <paolo.valente@linaro.org>, Jan Kara <jack@suse.cz>,
	Bart Van Assche <bvanassche@acm.org>,
	Artem Bityutskiy <dedekind1@gmail.com>,
	Richard Weinberger <richard@nod.at>,
	Jonathan Corbet <corbet@lwn.net>,
	linux-mmc <linux-mmc@vger.kernel.org>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Oleksandr Natalenko <oleksandr@natalenko.name>,
	linux-block <linux-block@vger.kernel.org>,
	Mark Brown <broonie@kernel.org>,
	linux-mtd@lists.infradead.org, Pavel Machek <pavel@ucw.cz>,
	Damien Le Moal <Damien.LeMoal@wdc.com>,
	One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Subject: Re: [PATCH v2] block: BFQ default for single queue devices
Date: Fri, 19 Oct 2018 15:44:38 +0200	[thread overview]
Message-ID: <e7687ded-bf95-5b76-a56b-99dc27434b8c@suse.de> (raw)
In-Reply-To: <CAHhmqcQinFN9ez5MTRquY0FPaYO2BmOKMn0avy84QPWLK1g2Gg@mail.gmail.com>

On 19/10/18 15:36, Bryan Gurney wrote:
> I like this idea.  I don't have enough experience to write this patch
> myself, but I imagine something like adding "bool is_zoned_aware" to
> "struct elevator_type", and setting that true only for the schedulers
> that are currently zoned-device aware (which is currently deadline on
> single queue, mq-deadline on blk-mq).

I don't think this is needed currently as a) Jens is working on getting
rid of the legacy path, which leaves us with mq-deadline only and Linus'
patch has:

+	if (blk_queue_is_zoned(q))
+		policy = "mq-deadline";

Which chooses mq-deadline on a zoned device.

So nothing to worry about here now.

All this only given Linus' patch actually gets merged.

Byte,
	Johannes
-- 
Johannes Thumshirn                                        SUSE Labs
jthumshirn@suse.de                                +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
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  reply	other threads:[~2018-10-19 13:44 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-15 14:10 [PATCH v2] block: BFQ default for single queue devices Linus Walleij
2018-10-15 14:22 ` Paolo Valente
2018-10-15 14:32 ` Oleksandr Natalenko
2018-10-19  8:33   ` Linus Walleij
2018-10-19  9:26     ` Oleksandr Natalenko
2018-10-15 15:02 ` Bart Van Assche
2018-10-15 18:34   ` Paolo Valente
2018-10-17  5:18     ` Paolo Valente
2018-10-16 16:14   ` Federico Motta
2018-10-16 16:26     ` Paolo Valente
2018-10-15 15:39 ` Jens Axboe
2018-10-15 18:26   ` Paolo Valente
2018-10-15 19:26     ` Jens Axboe
2018-10-15 19:44       ` Paolo Valente
2018-10-16 17:35         ` Jens Axboe
2018-10-17 10:05           ` Jan Kara
2018-10-17 14:48             ` Bart Van Assche
2018-10-17 14:59               ` Bryan Gurney
2018-10-19  8:42                 ` Linus Walleij
2018-10-19 13:36                   ` Bryan Gurney
2018-10-19 13:44                     ` Johannes Thumshirn [this message]
2018-10-19 14:16                       ` Bryan Gurney
2018-10-22  8:12                   ` Jens Axboe
2018-10-17 16:01               ` Mark Brown
2018-10-17 16:29             ` Jens Axboe
2018-10-18  7:21               ` Jan Kara
2018-10-18 14:35                 ` Jens Axboe
2018-10-19  8:22                   ` Pavel Machek
2018-10-22  8:08                     ` Jens Axboe
2018-11-02 10:40           ` Oleksandr Natalenko
2018-10-19 10:59     ` Paolo Valente
2018-10-22  8:21       ` Jens Axboe
2018-10-16 13:42 ` Ulf Hansson

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