Linux-BTRFS Archive on lore.kernel.org
 help / color / Atom feed
From: Johannes Thumshirn <jthumshirn@suse.de>
To: Naohiro Aota <naohiro.aota@wdc.com>
Cc: linux-btrfs@vger.kernel.org, David Sterba <dsterba@suse.com>,
	Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
	Nikolay Borisov <nborisov@suse.com>,
	Damien Le Moal <damien.lemoal@wdc.com>,
	Hannes Reinecke <hare@suse.com>,
	Anand Jain <anand.jain@oracle.com>,
	linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v5 03/28] btrfs: Check and enable HMZONED mode
Date: Wed, 4 Dec 2019 17:07:34 +0100
Message-ID: <20191204160734.GA3950@Johanness-MacBook-Pro.local> (raw)
In-Reply-To: <20191204081735.852438-4-naohiro.aota@wdc.com>

On Wed, Dec 04, 2019 at 05:17:10PM +0900, Naohiro Aota wrote:
> HMZONED mode cannot be used together with the RAID5/6 profile for now.
> Introduce the function btrfs_check_hmzoned_mode() to check this. This
> function will also check if HMZONED flag is enabled on the file system and
> if the file system consists of zoned devices with equal zone size.

I have a question, you wrote you check for a file system consisting of zoned
devices with equal zone size. What happens if you create a multi device file
system combining zoned and regular devices? Is this even supported and if no
where are the checks for it?

[...]

> +int btrfs_check_hmzoned_mode(struct btrfs_fs_info *fs_info)
> +{
> +	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
> +	struct btrfs_device *device;
> +	u64 hmzoned_devices = 0;
> +	u64 nr_devices = 0;
> +	u64 zone_size = 0;
> +	int incompat_hmzoned = btrfs_fs_incompat(fs_info, HMZONED);
> +	int ret = 0;
> +
> +	/* Count zoned devices */
> +	list_for_each_entry(device, &fs_devices->devices, dev_list) {
> +		if (!device->bdev)
> +			continue;

Nit:
		enum blk_zoned_model zone_model = blk_zoned_model(device->bdev);

		if (zone_model == BLK_ZONED_HM ||
		    zone_model == BLK_ZONED_HA &&
		    incompat_hmzoned) {

> +		if (bdev_zoned_model(device->bdev) == BLK_ZONED_HM ||
> +		    (bdev_zoned_model(device->bdev) == BLK_ZONED_HA &&
> +		     incompat_hmzoned)) {
> +			hmzoned_devices++;
> +			if (!zone_size) {
> +				zone_size = device->zone_info->zone_size;
> +			} else if (device->zone_info->zone_size != zone_size) {
> +				btrfs_err(fs_info,
> +					  "Zoned block devices must have equal zone sizes");
> +				ret = -EINVAL;
> +				goto out;
> +			}
> +		}
> +		nr_devices++;
> +	}

  reply index

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-04  8:17 [PATCH v5 00/28] btrfs: zoned block device support Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 01/28] btrfs: introduce HMZONED feature flag Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 02/28] btrfs: Get zone information of zoned block devices Naohiro Aota
2019-12-04 15:37   ` Johannes Thumshirn
2019-12-04 17:22     ` David Sterba
2019-12-05  6:29       ` Naohiro Aota
2019-12-05  6:28     ` Naohiro Aota
2019-12-07  9:47   ` Anand Jain
2019-12-10  4:41     ` Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 03/28] btrfs: Check and enable HMZONED mode Naohiro Aota
2019-12-04 16:07   ` Johannes Thumshirn [this message]
2019-12-05  5:17     ` Naohiro Aota
2019-12-05 15:28       ` David Sterba
2019-12-04  8:17 ` [PATCH v5 04/28] btrfs: disallow RAID5/6 in " Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 05/28] btrfs: disallow space_cache " Naohiro Aota
2019-12-05  7:21   ` Johannes Thumshirn
2019-12-05 15:39   ` David Sterba
2019-12-06  5:32     ` Naohiro Aota
2019-12-06 15:12       ` David Sterba
2019-12-04  8:17 ` [PATCH v5 06/28] btrfs: disallow NODATACOW " Naohiro Aota
2019-12-05  7:58   ` Johannes Thumshirn
2019-12-05 15:31   ` David Sterba
2019-12-06  5:37     ` Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 07/28] btrfs: disable fallocate " Naohiro Aota
2019-12-05  8:00   ` Johannes Thumshirn
2019-12-04  8:17 ` [PATCH v5 08/28] btrfs: implement log-structured superblock for " Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 09/28] btrfs: align device extent allocation to zone boundary Naohiro Aota
2019-12-05  8:56   ` Johannes Thumshirn
2019-12-06  5:45     ` Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 10/28] btrfs: do sequential extent allocation in HMZONED mode Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 11/28] btrfs: make unmirroed BGs readonly only if we have at least one writable BG Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 12/28] btrfs: ensure metadata space available on/after degraded mount in HMZONED Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 13/28] btrfs: reset zones of unused block groups Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 14/28] btrfs: redirty released extent buffers in HMZONED mode Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 15/28] btrfs: serialize data allocation and submit IOs Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 16/28] btrfs: implement atomic compressed IO submission Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 17/28] btrfs: support direct write IO in HMZONED Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 18/28] btrfs: serialize meta IOs on HMZONED mode Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 19/28] btrfs: wait existing extents before truncating Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 20/28] btrfs: avoid async checksum on HMZONED mode Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 21/28] btrfs: disallow mixed-bg in " Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 22/28] btrfs: disallow inode_cache " Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 23/28] btrfs: support dev-replace " Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 24/28] btrfs: enable relocation " Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 25/28] btrfs: relocate block group to repair IO failure in HMZONED Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 26/28] btrfs: split alloc_log_tree() Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 27/28] btrfs: enable tree-log on HMZONED mode Naohiro Aota
2019-12-04  8:17 ` [PATCH v5 28/28] btrfs: enable to mount HMZONED incompat flag Naohiro Aota

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20191204160734.GA3950@Johanness-MacBook-Pro.local \
    --to=jthumshirn@suse.de \
    --cc=anand.jain@oracle.com \
    --cc=clm@fb.com \
    --cc=damien.lemoal@wdc.com \
    --cc=dsterba@suse.com \
    --cc=hare@suse.com \
    --cc=josef@toxicpanda.com \
    --cc=linux-btrfs@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=naohiro.aota@wdc.com \
    --cc=nborisov@suse.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-BTRFS Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-btrfs/0 linux-btrfs/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-btrfs linux-btrfs/ https://lore.kernel.org/linux-btrfs \
		linux-btrfs@vger.kernel.org
	public-inbox-index linux-btrfs

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-btrfs


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git