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Re: [Ocfs2-devel] [PATCH 23/27] block: add a bdev_max_discard_sectors helper
- To: Christoph Hellwig via Ocfs2-devel <ocfs2-devel@xxxxxxxxxxxxxx>
- From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
- Date: Wed, 06 Apr 2022 23:30:51 -0400
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- Cc: Jens Axboe <axboe@xxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, jfs-discussion@xxxxxxxxxxxxxxxxxxxxx, linux-nvme@xxxxxxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, dm-devel@xxxxxxxxxx, target-devel@xxxxxxxxxxxxxxx, linux-mtd@xxxxxxxxxxxxxxxxxxx, drbd-dev@xxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-nilfs@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, cluster-devel@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, linux-um@xxxxxxxxxxxxxxxxxxx, nbd@xxxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, linux-bcache@xxxxxxxxxxxxxxx, ceph-devel@xxxxxxxxxxxxxxx, linux-raid@xxxxxxxxxxxxxxx, linux-mmc@xxxxxxxxxxxxxxx, linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, ntfs3@xxxxxxxxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx
- Delivery-date: Thu, 07 Apr 2022 03:36:23 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Christoph,
> Add a helper to query the number of sectors support per each discard
> bio based on the block device and use this helper to stop various
> places from poking into the request_queue to see if discard is
> supported and if so how much. This mirrors what is done e.g. for
> write zeroes as well.
Nicer!
Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
--
Martin K. Petersen Oracle Linux Engineering
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