Re: [PATCH 04/14] block: take io_opt and io_min into account for max_sectors

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To: Christoph Hellwig <hch@xxxxxx>
Subject: Re: [PATCH 04/14] block: take io_opt and io_min into account for max_sectors
From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Date: Thu, 13 Jun 2024 21:40:27 -0400
Cc: Jens Axboe <axboe@xxxxxxxxx>, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, Richard Weinberger <richard@xxxxxx>, Anton Ivanov <anton.ivanov@xxxxxxxxxxxxxxxxxx>, Johannes Berg <johannes@xxxxxxxxxxxxxxxx>, Josef Bacik <josef@xxxxxxxxxxxxxx>, Ilya Dryomov <idryomov@xxxxxxxxx>, Dongsheng Yang <dongsheng.yang@xxxxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, linux-um@xxxxxxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, nbd@xxxxxxxxxxxxxxxx, ceph-devel@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, Bart Van Assche <bvanassche@xxxxxxx>, Damien Le Moal <dlemoal@xxxxxxxxxx>
In-reply-to: <20240531074837.1648501-5-hch@lst.de> (Christoph Hellwig's message of "Fri, 31 May 2024 09:47:59 +0200")
Organization: Oracle Corporation

Christoph,

> The soft max_sectors limit is normally capped by the hardware limits and
> an arbitrary upper limit enforced by the kernel, but can be modified by
> the user.  A few drivers want to increase this limit (nbd, rbd) or
> adjust it up or down based on hardware capabilities (sd).

Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>

-- 
Martin K. Petersen	Oracle Linux Engineering

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References:
- convert the SCSI ULDs to the atomic queue limits API v2
  - From: Christoph Hellwig
- [PATCH 04/14] block: take io_opt and io_min into account for max_sectors
  - From: Christoph Hellwig

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