Received-SPF: softfail (google.com: domain of transitioning linux-ext4-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19;
Date:   Thu, 7 Apr 2022 17:22:43 +0200
From:   David Sterba <dsterba@suse.cz>
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
Message-ID: <20220407152243.GK15609@twin.jikos.cz>
Reply-To: dsterba@suse.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
References: <20220406060516.409838-1-hch@lst.de>
 <20220406060516.409838-24-hch@lst.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20220406060516.409838-24-hch@lst.de>
User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12)
Precedence: bulk

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>