Re: [PATCH 26/27] block: uncouple REQ_OP_SECURE_ERASE from REQ_OP_DISCARD

From: Coly Li <colyli@suse.de>
To: Christoph Hellwig <hch@lst.de>
Cc: 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,
	Jens Axboe <axboe@kernel.dk>
Subject: Re: [PATCH 26/27] block: uncouple REQ_OP_SECURE_ERASE from REQ_OP_DISCARD
Date: Thu, 7 Apr 2022 14:09:30 +0800	[thread overview]
Message-ID: <ac88801d-c1f9-e8a4-e0cf-e5f7cbdfbfc3@suse.de> (raw)
In-Reply-To: <20220406060516.409838-27-hch@lst.de>

On 4/6/22 2:05 PM, Christoph Hellwig wrote:
> Secure erase is a very different operation from discard in that it is
> a data integrity operation vs hint.  Fully split the limits and helper
> infrastructure to make the separation more clear.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>

For the bcache part,

Acked-by: Coly Li <colyli@suse.de>

Thanks.

Coly Li

> ---
>   block/blk-core.c                    |  2 +-
>   block/blk-lib.c                     | 64 ++++++++++++++++++++---------
>   block/blk-mq-debugfs.c              |  1 -
>   block/blk-settings.c                | 16 +++++++-
>   block/fops.c                        |  2 +-
>   block/ioctl.c                       | 43 +++++++++++++++----
>   drivers/block/drbd/drbd_receiver.c  |  5 ++-
>   drivers/block/rnbd/rnbd-clt.c       |  4 +-
>   drivers/block/rnbd/rnbd-srv-dev.h   |  2 +-
>   drivers/block/xen-blkback/blkback.c | 15 +++----
>   drivers/block/xen-blkback/xenbus.c  |  5 +--
>   drivers/block/xen-blkfront.c        |  5 ++-
>   drivers/md/bcache/alloc.c           |  2 +-
>   drivers/md/dm-table.c               |  8 ++--
>   drivers/md/dm-thin.c                |  4 +-
>   drivers/md/md.c                     |  2 +-
>   drivers/md/raid5-cache.c            |  6 +--
>   drivers/mmc/core/queue.c            |  2 +-
>   drivers/nvme/target/io-cmd-bdev.c   |  2 +-
>   drivers/target/target_core_file.c   |  2 +-
>   drivers/target/target_core_iblock.c |  2 +-
>   fs/btrfs/extent-tree.c              |  4 +-
>   fs/ext4/mballoc.c                   |  2 +-
>   fs/f2fs/file.c                      | 16 ++++----
>   fs/f2fs/segment.c                   |  2 +-
>   fs/jbd2/journal.c                   |  2 +-
>   fs/nilfs2/sufile.c                  |  4 +-
>   fs/nilfs2/the_nilfs.c               |  4 +-
>   fs/ntfs3/super.c                    |  2 +-
>   fs/xfs/xfs_discard.c                |  2 +-
>   fs/xfs/xfs_log_cil.c                |  2 +-
>   include/linux/blkdev.h              | 27 +++++++-----
>   mm/swapfile.c                       |  6 +--
>   33 files changed, 168 insertions(+), 99 deletions(-)
[snipped]
> diff --git a/drivers/md/bcache/alloc.c b/drivers/md/bcache/alloc.c
> index 097577ae3c471..ce13c272c3872 100644
> --- a/drivers/md/bcache/alloc.c
> +++ b/drivers/md/bcache/alloc.c
> @@ -336,7 +336,7 @@ static int bch_allocator_thread(void *arg)
>   				mutex_unlock(&ca->set->bucket_lock);
>   				blkdev_issue_discard(ca->bdev,
>   					bucket_to_sector(ca->set, bucket),
> -					ca->sb.bucket_size, GFP_KERNEL, 0);
> +					ca->sb.bucket_size, GFP_KERNEL);
>   				mutex_lock(&ca->set->bucket_lock);
>   			}
>   

[snipped]