From: Christoph Hellwig <hch@infradead.org>
To: Niklas Cassel <niklas.cassel@wdc.com>
Cc: Paolo Valente <paolo.valente@linaro.org>,
Jens Axboe <axboe@kernel.dk>, Hannes Reinecke <hare@suse.de>,
Damien Le Moal <damien.lemoal@opensource.wdc.com>,
linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org,
linux-block@vger.kernel.org
Subject: Re: [PATCH v2 07/18] block: introduce duration-limits priority class
Date: Mon, 16 Jan 2023 23:25:50 -0800 [thread overview]
Message-ID: <Y8ZNftvsEIuPqMFP@infradead.org> (raw)
In-Reply-To: <20230112140412.667308-8-niklas.cassel@wdc.com>
On Thu, Jan 12, 2023 at 03:03:56PM +0100, Niklas Cassel wrote:
> From: Damien Le Moal <damien.lemoal@opensource.wdc.com>
>
> Introduce the IOPRIO_CLASS_DL priority class to indicate that IOs should
> be executed using duration-limits targets. The duration target to apply
> to a command is indicated using the priority level. Up to 8 levels are
> supported, with level 0 indiating "no limit".
>
> This priority class has effect only if the target device supports the
> command duration limits feature and this feature is enabled by the user.
> In BFQ and mq-deadline, all requests with this new priority class are
> handled using the highest priority class RT and priority level 0.
Hmm, does it make sense to force a high priority? Can't applications
use CDL to also fore a lower priority?
next prev parent reply other threads:[~2023-01-17 7:25 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-12 14:03 [PATCH v2 00/18] Add Command Duration Limits support Niklas Cassel
2023-01-12 14:03 ` [PATCH v2 01/18] ata: libata: allow ata_scsi_set_sense() to not set CHECK_CONDITION Niklas Cassel
2023-01-13 7:49 ` Hannes Reinecke
2023-01-17 6:06 ` Christoph Hellwig
2023-01-17 7:10 ` Damien Le Moal
2023-01-17 7:12 ` Christoph Hellwig
2023-01-17 7:15 ` Damien Le Moal
2023-01-17 7:23 ` Christoph Hellwig
2023-01-12 14:03 ` [PATCH v2 02/18] ata: libata: allow ata_eh_request_sense() " Niklas Cassel
2023-01-13 7:51 ` Hannes Reinecke
2023-01-17 6:08 ` Christoph Hellwig
2023-01-12 14:03 ` [PATCH v2 03/18] scsi: core: allow libata to complete successful commands via EH Niklas Cassel
2023-01-13 7:57 ` Hannes Reinecke
2023-01-16 12:43 ` Niklas Cassel
2023-01-17 11:44 ` Hannes Reinecke
2023-01-17 7:24 ` Christoph Hellwig
2023-01-12 14:03 ` [PATCH v2 04/18] scsi: rename and move get_scsi_ml_byte() Niklas Cassel
2023-01-13 7:58 ` Hannes Reinecke
2023-01-17 6:12 ` Christoph Hellwig
2023-01-12 14:03 ` [PATCH v2 05/18] scsi: support retrieving sub-pages of mode pages Niklas Cassel
2023-01-13 7:59 ` Hannes Reinecke
2023-01-17 6:13 ` Christoph Hellwig
2023-01-12 14:03 ` [PATCH v2 06/18] scsi: support service action in scsi_report_opcode() Niklas Cassel
2023-01-13 11:48 ` Hannes Reinecke
2023-01-17 6:13 ` Christoph Hellwig
2023-01-12 14:03 ` [PATCH v2 07/18] block: introduce duration-limits priority class Niklas Cassel
2023-01-13 11:55 ` Hannes Reinecke
2023-01-13 12:44 ` Damien Le Moal
2023-01-17 7:25 ` Christoph Hellwig [this message]
2023-01-17 8:06 ` Damien Le Moal
2023-01-17 8:13 ` Christoph Hellwig
2023-01-17 8:14 ` Damien Le Moal
2023-01-12 14:03 ` [PATCH v2 08/18] block: introduce BLK_STS_DURATION_LIMIT Niklas Cassel
2023-01-13 11:56 ` Hannes Reinecke
2023-01-17 7:26 ` Christoph Hellwig
2023-01-12 14:03 ` [PATCH v2 09/18] ata: libata: detect support for command duration limits Niklas Cassel
2023-01-13 11:59 ` Hannes Reinecke
2023-01-12 14:03 ` [PATCH v2 10/18] ata: libata-scsi: handle CDL bits in ata_scsiop_maint_in() Niklas Cassel
2023-01-12 14:04 ` [PATCH v2 11/18] ata: libata-scsi: add support for CDL pages mode sense Niklas Cassel
2023-01-12 14:04 ` [PATCH v2 12/18] ata: libata: add ATA feature control sub-page translation Niklas Cassel
2023-01-12 14:04 ` [PATCH v2 13/18] ata: libata: set read/write commands CDL index Niklas Cassel
2023-01-12 14:04 ` [PATCH v2 14/18] scsi: sd: detect support for command duration limits Niklas Cassel
2023-01-17 7:37 ` Christoph Hellwig
2023-01-17 8:00 ` Damien Le Moal
2023-01-12 14:04 ` [PATCH v2 15/18] scsi: sd: set read/write commands CDL index Niklas Cassel
2023-01-12 14:04 ` [PATCH v2 16/18] scsi: sd: handle read/write CDL timeout failures Niklas Cassel
2023-01-12 14:04 ` [PATCH v2 17/18] ata: libata: handle completion of CDL commands using policy 0xD Niklas Cassel
2023-01-12 14:04 ` [PATCH v2 18/18] Documentation: sysfs-block-device: document command duration limits Niklas Cassel
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