Re: [PATCH 23/27] block: add a bdev_max_discard_sectors helper
- To: Christoph Hellwig <hch@lst.de>
- Cc: Jens Axboe <axboe@kernel.dk>, dm-devel@redhat.com, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-um@lists.infradead.org, linux-block@vger.kernel.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, ceph-devel@vger.kernel.org, virtualization@lists.linux-foundation.org, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mtd@lists.infradead.org, linux-nvme@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, jfs-discussion@lists.sourceforge.net, linux-nilfs@vger.kernel.org, ntfs3@lists.linux.dev, ocfs2-devel@oss.oracle.com, linux-mm@kvack.org
- Subject: Re: [PATCH 23/27] block: add a bdev_max_discard_sectors helper
- From: David Sterba <dsterba@suse.cz>
- Date: Thu, 7 Apr 2022 17:22:43 +0200
- Message-id: <[🔎] 20220407152243.GK15609@twin.jikos.cz>
- Mail-followup-to: dsterba@suse.cz, Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>, dm-devel@redhat.com, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-um@lists.infradead.org, linux-block@vger.kernel.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, ceph-devel@vger.kernel.org, virtualization@lists.linux-foundation.org, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mtd@lists.infradead.org, linux-nvme@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, jfs-discussion@lists.sourceforge.net, linux-nilfs@vger.kernel.org, ntfs3@lists.linux.dev, ocfs2-devel@oss.oracle.com, linux-mm@kvack.org
- Reply-to: dsterba@suse.cz
- In-reply-to: <[🔎] 20220406060516.409838-24-hch@lst.de>
- References: <[🔎] 20220406060516.409838-1-hch@lst.de> <[🔎] 20220406060516.409838-24-hch@lst.de>
On Wed, Apr 06, 2022 at 08:05:12AM +0200, Christoph Hellwig wrote:
> 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.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> block/blk-core.c | 2 +-
> block/blk-lib.c | 2 +-
> block/ioctl.c | 3 +--
> drivers/block/drbd/drbd_main.c | 2 +-
> drivers/block/drbd/drbd_nl.c | 12 +++++++-----
> drivers/block/drbd/drbd_receiver.c | 5 ++---
> drivers/block/loop.c | 9 +++------
> drivers/block/rnbd/rnbd-srv-dev.h | 6 +-----
> drivers/block/xen-blkback/xenbus.c | 2 +-
> drivers/md/bcache/request.c | 4 ++--
> drivers/md/bcache/super.c | 2 +-
> drivers/md/bcache/sysfs.c | 2 +-
> drivers/md/dm-cache-target.c | 9 +--------
> drivers/md/dm-clone-target.c | 9 +--------
> drivers/md/dm-io.c | 2 +-
> drivers/md/dm-log-writes.c | 3 +--
> drivers/md/dm-raid.c | 9 ++-------
> drivers/md/dm-table.c | 4 +---
> drivers/md/dm-thin.c | 9 +--------
> drivers/md/dm.c | 2 +-
> drivers/md/md-linear.c | 4 ++--
> drivers/md/raid0.c | 2 +-
> drivers/md/raid1.c | 6 +++---
> drivers/md/raid10.c | 8 ++++----
> drivers/md/raid5-cache.c | 2 +-
> drivers/target/target_core_device.c | 8 +++-----
For
> fs/btrfs/extent-tree.c | 4 ++--
> fs/btrfs/ioctl.c | 2 +-
Acked-by: David Sterba <dsterba@suse.com>
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