From: Christoph Hellwig <hch@infradead.org>
To: Damien Le Moal <damien.lemoal@wdc.com>
Cc: linux-block@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>
Subject: Re: [PATCH v2 4/7] block: Improve default elevator selection
Date: Tue, 3 Sep 2019 01:57:12 -0700 [thread overview]
Message-ID: <20190903085712.GD23783@infradead.org> (raw)
In-Reply-To: <20190828022947.23364-5-damien.lemoal@wdc.com>
On Wed, Aug 28, 2019 at 11:29:44AM +0900, Damien Le Moal wrote:
> For block devices that do not specify required features, preserve the
> current default elevator selection (mq-deadline for single queue
> devices, none for multi-queue devices). However, for devices specifying
> required features (e.g. zoned block devices ELEVATOR_F_ZBD_SEQ_WRITE
> feature), select the first available elevator providing the required
> features.
>
> In all cases, default to "none" if no elevator is available or if the
> initialization of the default elevator fails.
>
> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Looks good,
Reviewed-by: Christoph Hellwig <hch@lst.de>
next prev parent reply other threads:[~2019-09-03 8:57 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-28 2:29 [PATCH v2 0/7] Elevator cleanups and improvements Damien Le Moal
2019-08-28 2:29 ` [PATCH v2 1/7] block: Cleanup elevator_init_mq() use Damien Le Moal
2019-09-03 8:55 ` Christoph Hellwig
2019-08-28 2:29 ` [PATCH v2 2/7] block: Change elevator_init_mq() to always succeed Damien Le Moal
2019-09-03 8:55 ` Christoph Hellwig
2019-08-28 2:29 ` [PATCH v2 3/7] block: Introduce elevator features Damien Le Moal
2019-08-28 8:16 ` Johannes Thumshirn
2019-08-28 10:41 ` Damien Le Moal
2019-08-28 10:43 ` Johannes Thumshirn
2019-08-28 11:08 ` Damien Le Moal
2019-08-28 11:11 ` Johannes Thumshirn
2019-09-03 8:56 ` Christoph Hellwig
2019-08-28 2:29 ` [PATCH v2 4/7] block: Improve default elevator selection Damien Le Moal
2019-09-03 8:57 ` Christoph Hellwig [this message]
2019-09-04 8:42 ` Damien Le Moal
2019-08-28 2:29 ` [PATCH v2 5/7] block: Delay default elevator initialization Damien Le Moal
2019-09-03 9:02 ` Christoph Hellwig
2019-09-04 2:07 ` Damien Le Moal
2019-09-04 6:47 ` Christoph Hellwig
2019-08-28 2:29 ` [PATCH v2 6/7] block: Set ELEVATOR_F_ZBD_SEQ_WRITE for nullblk zoned disks Damien Le Moal
2019-09-03 9:03 ` Christoph Hellwig
2019-08-28 2:29 ` [PATCH v2 7/7] scsi: Set ELEVATOR_F_ZBD_SEQ_WRITE for ZBC disks Damien Le Moal
2019-09-03 9:03 ` Christoph Hellwig
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