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Date: Wed, 24 Jan 2024 10:08:43 +0100
From: Christoph Hellwig <hch@lst.de>
To: Bart Van Assche <bvanassche@acm.org>
Cc: Christoph Hellwig <hch@lst.de>, Yu Kuai <yukuai1@huaweicloud.com>,
	Jens Axboe <axboe@kernel.dk>, linux-block@vger.kernel.org,
	linux-scsi@vger.kernel.org,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	Ming Lei <ming.lei@redhat.com>, Keith Busch <kbusch@kernel.org>,
	Damien Le Moal <damien.lemoal@opensource.wdc.com>,
	Ed Tsai <ed.tsai@mediatek.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>,
	"yukuai (C)" <yukuai3@huawei.com>
Subject: Re: [PATCH v6 1/4] block: Make fair tag sharing configurable
Message-ID: <20240124090843.GA28180@lst.de>
References: <2d83fcb3-06e6-4a7c-9bd7-b8018208b72f@huaweicloud.com> <20240115055940.GA745@lst.de> <0d23e3d3-1d7a-f76b-307b-7d74b3f91e05@huaweicloud.com> <f1cac818-8fc8-4f24-b445-d10aa99c04ba@acm.org> <e0305a2c-20c1-7e0f-d25d-003d7a72355f@huaweicloud.com> <aedc82bc-ef10-4bc6-b76c-bf239f48450f@acm.org> <20240118073151.GA21386@lst.de> <434b771a-7873-4c53-9faa-c5dbc4296495@acm.org> <20240123091316.GA32130@lst.de> <ac240189-d889-448b-b5f7-7d5a13d4316d@acm.org>
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On Tue, Jan 23, 2024 at 07:16:05AM -0800, Bart Van Assche wrote:
> On 1/23/24 01:13, Christoph Hellwig wrote:
>> The point is why you think fair sharing is not actually required for
>> these particular setups only.
>
> Hi Christoph,
>
> Do you perhaps want me to move the SCSI host sysfs attribute that controls
> fair sharing to the /sys/block/${bdev}/queue directory?

No.  I want an explanation from you why you think your use case is so
snowflake special that you and just you need to fisable fair sharing.