Re: [PATCH 01/12] ubd: untagle discard vs write zeroes not support handling

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To: Christoph Hellwig <hch@xxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Subject: Re: [PATCH 01/12] ubd: untagle discard vs write zeroes not support handling
From: Bart Van Assche <bvanassche@xxxxxxx>
Date: Thu, 30 May 2024 12:44:46 -0700
Cc: 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
In-reply-to: <20240529050507.1392041-2-hch@lst.de>
References: <20240529050507.1392041-1-hch@lst.de> <20240529050507.1392041-2-hch@lst.de>
User-agent: Mozilla Thunderbird

On 5/28/24 22:04, Christoph Hellwig wrote:

Discard and Write Zeroes are different operation and implemented
by different fallocate opcodes for ubd.  If one fails the other one
can work and vice versa.

Split the code to disable the operations in ubd_handler to only
disable the operation that actually failed.


Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>

References:
- convert the SCSI ULDs to the atomic queue limits API
  - From: Christoph Hellwig
- [PATCH 01/12] ubd: untagle discard vs write zeroes not support handling
  - From: Christoph Hellwig

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