From: Christoph Hellwig <hch@lst.de>
To: Pankaj Raghav <p.raghav@samsung.com>
Cc: axboe@kernel.dk, damien.lemoal@opensource.wdc.com,
pankydev8@gmail.com, dsterba@suse.com, hch@lst.de,
linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org,
linux-btrfs@vger.kernel.org, jiangbo.365@bytedance.com,
linux-block@vger.kernel.org, gost.dev@samsung.com,
linux-kernel@vger.kernel.org, dm-devel@redhat.com
Subject: Re: [PATCH v4 00/13] support non power of 2 zoned devices
Date: Tue, 17 May 2022 10:10:48 +0200 [thread overview]
Message-ID: <20220517081048.GA13947@lst.de> (raw)
In-Reply-To: <20220516165416.171196-1-p.raghav@samsung.com>
I'm a little surprised about all this activity.
I though the conclusion at LSF/MM was that for Linux itself there
is very little benefit in supporting this scheme. It will massively
fragment the supported based of devices and applications, while only
having the benefit of supporting some Samsung legacy devices.
So my impression was that this work, while technically feasible, is
rather useless. So unless I missed something important I have no
interest in supporting this in NVMe.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Pankaj Raghav <p.raghav@samsung.com>
Cc: axboe@kernel.dk, pankydev8@gmail.com, gost.dev@samsung.com,
damien.lemoal@opensource.wdc.com, jiangbo.365@bytedance.com,
linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
dm-devel@redhat.com, dsterba@suse.com, hch@lst.de,
linux-btrfs@vger.kernel.org
Subject: Re: [dm-devel] [PATCH v4 00/13] support non power of 2 zoned devices
Date: Tue, 17 May 2022 10:10:48 +0200 [thread overview]
Message-ID: <20220517081048.GA13947@lst.de> (raw)
In-Reply-To: <20220516165416.171196-1-p.raghav@samsung.com>
I'm a little surprised about all this activity.
I though the conclusion at LSF/MM was that for Linux itself there
is very little benefit in supporting this scheme. It will massively
fragment the supported based of devices and applications, while only
having the benefit of supporting some Samsung legacy devices.
So my impression was that this work, while technically feasible, is
rather useless. So unless I missed something important I have no
interest in supporting this in NVMe.
--
dm-devel mailing list
dm-devel@redhat.com
https://listman.redhat.com/mailman/listinfo/dm-devel
next prev parent reply other threads:[~2022-05-17 8:11 UTC|newest]
Thread overview: 109+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20220516165418eucas1p2be592d9cd4b35f6b71d39ccbe87f3fef@eucas1p2.samsung.com>
2022-05-16 16:54 ` [PATCH v4 00/13] support non power of 2 zoned devices Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
[not found] ` <CGME20220516165419eucas1p104aadda60df323e6154bfc3b92103b7b@eucas1p1.samsung.com>
2022-05-16 16:54 ` [PATCH v4 01/13] block: make blkdev_nr_zones and blk_queue_zone_no generic for npo2 zsze Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
[not found] ` <CGME20220516165421eucas1p2515446ac290987bdb9af24ffb835b287@eucas1p2.samsung.com>
2022-05-16 16:54 ` [PATCH v4 02/13] block: allow blk-zoned devices to have non-power-of-2 zone size Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
2022-05-16 19:05 ` Pankaj Raghav
2022-05-16 19:05 ` [dm-devel] " Pankaj Raghav
[not found] ` <CGME20220516165422eucas1p174acec28848a9c2178376f092af3fa1c@eucas1p1.samsung.com>
2022-05-16 16:54 ` [PATCH v4 03/13] nvme: zns: Allow ZNS drives that have non-power_of_2 " Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
[not found] ` <CGME20220516165424eucas1p2ee38cd64260539e5cac8d1fa4d0cba38@eucas1p2.samsung.com>
2022-05-16 16:54 ` [PATCH v4 04/13] nvmet: Allow ZNS target to support non-power_of_2 zone sizes Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
2022-05-17 14:19 ` Johannes Thumshirn
2022-05-17 14:19 ` [dm-devel] " Johannes Thumshirn
[not found] ` <CGME20220516165425eucas1p29fcd11d7051d9d3a9a9efc17cd3b6999@eucas1p2.samsung.com>
2022-05-16 16:54 ` [PATCH v4 05/13] btrfs: zoned: Cache superblock location in btrfs_zoned_device_info Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
2022-05-16 21:58 ` David Sterba
2022-05-16 21:58 ` [dm-devel] " David Sterba
2022-05-17 7:55 ` Pankaj Raghav
2022-05-17 7:55 ` [dm-devel] " Pankaj Raghav
[not found] ` <CGME20220516165427eucas1p1cfd87ca44ec314ea1d2ddc8ece7259f9@eucas1p1.samsung.com>
2022-05-16 16:54 ` [PATCH v4 06/13] btrfs: zoned: Make sb_zone_number function non power of 2 compatible Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
2022-05-17 6:53 ` Johannes Thumshirn
2022-05-17 6:53 ` [dm-devel] " Johannes Thumshirn
2022-05-17 11:51 ` David Sterba
2022-05-17 11:51 ` [dm-devel] " David Sterba
[not found] ` <CGME20220516165428eucas1p1374b5f9592db3ca6a6551aff975537ce@eucas1p1.samsung.com>
2022-05-16 16:54 ` [PATCH v4 07/13] btrfs: zoned: use generic btrfs zone helpers to support npo2 zoned devices Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
2022-05-17 12:30 ` David Sterba
2022-05-17 12:30 ` [dm-devel] " David Sterba
2022-05-18 9:40 ` Pankaj Raghav
2022-05-18 9:40 ` Pankaj Raghav
2022-05-18 11:21 ` David Sterba
2022-05-18 11:21 ` [dm-devel] " David Sterba
2022-05-19 4:13 ` Naohiro Aota
2022-05-19 4:13 ` [dm-devel] " Naohiro Aota
[not found] ` <CGME20220516165429eucas1p272c8b4325a488675f08f2d7016aa6230@eucas1p2.samsung.com>
2022-05-16 16:54 ` [PATCH v4 08/13] btrfs:zoned: make sb for npo2 zone devices align with sb log offsets Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
2022-05-17 6:50 ` Johannes Thumshirn
2022-05-17 6:50 ` Johannes Thumshirn
2022-05-17 8:00 ` Pankaj Raghav
2022-05-17 8:00 ` [dm-devel] " Pankaj Raghav
2022-05-17 12:42 ` David Sterba
2022-05-17 12:42 ` [dm-devel] " David Sterba
2022-05-18 9:15 ` Pankaj Raghav
2022-05-18 9:15 ` [dm-devel] " Pankaj Raghav
2022-05-19 7:57 ` Johannes Thumshirn
2022-05-19 7:57 ` [dm-devel] " Johannes Thumshirn
2022-05-20 9:06 ` Pankaj Raghav
2022-05-20 9:06 ` [dm-devel] " Pankaj Raghav
2022-05-20 9:15 ` Johannes Thumshirn
2022-05-20 9:15 ` [dm-devel] " Johannes Thumshirn
2022-05-19 7:59 ` Naohiro Aota
2022-05-19 7:59 ` [dm-devel] " Naohiro Aota
2022-05-20 9:09 ` Pankaj Raghav
2022-05-20 9:09 ` [dm-devel] " Pankaj Raghav
[not found] ` <CGME20220516165430eucas1p214cca8eaba1db2c98d947444cad4f18f@eucas1p2.samsung.com>
2022-05-16 16:54 ` [PATCH v4 09/13] btrfs: zoned: relax the alignment constraint for zoned devices Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
[not found] ` <CGME20220516165432eucas1p2e1ea74d44738e44745f49e37b6b9e503@eucas1p2.samsung.com>
2022-05-16 16:54 ` [PATCH v4 10/13] zonefs: allow non power of 2 " Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
[not found] ` <CGME20220516165434eucas1p12b178fb83cc93470933e3d72c40e9004@eucas1p1.samsung.com>
2022-05-16 16:54 ` [PATCH v4 11/13] null_blk: " Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
2022-05-17 4:12 ` kernel test robot
2022-05-17 4:12 ` [dm-devel] " kernel test robot
[not found] ` <CGME20220516165435eucas1p1dff8d9d039a76278ef1c09dba4b4e1fe@eucas1p1.samsung.com>
2022-05-16 16:54 ` [PATCH v4 12/13] null_blk: use zone_size_sects_shift for " Pankaj Raghav
2022-05-16 16:54 ` [dm-devel] " Pankaj Raghav
[not found] ` <CGME20220516165436eucas1p178d079302dae3a9fca696b13b0390deb@eucas1p1.samsung.com>
2022-05-16 16:54 ` [dm-devel] [PATCH v4 13/13] dm-zoned: ensure only power of 2 zone sizes are allowed Pankaj Raghav
2022-05-16 16:54 ` Pankaj Raghav
2022-05-17 8:10 ` Christoph Hellwig [this message]
2022-05-17 8:10 ` [dm-devel] [PATCH v4 00/13] support non power of 2 zoned devices Christoph Hellwig
2022-05-17 9:18 ` Javier González
2022-05-17 9:18 ` [dm-devel] " Javier González
2022-05-18 8:00 ` Christoph Hellwig
2022-05-18 8:00 ` [dm-devel] " Christoph Hellwig
2022-05-19 15:25 ` Javier González
2022-05-19 15:25 ` [dm-devel] " Javier González
2022-05-17 15:34 ` Theodore Ts'o
2022-05-17 15:34 ` Theodore Ts'o
2022-05-18 23:06 ` Luis Chamberlain
2022-05-18 23:06 ` Luis Chamberlain
2022-05-19 3:08 ` Damien Le Moal
2022-05-19 3:08 ` Damien Le Moal
2022-05-19 3:12 ` Luis Chamberlain
2022-05-19 3:12 ` Luis Chamberlain
2022-05-19 3:19 ` Damien Le Moal
2022-05-19 3:19 ` Damien Le Moal
2022-05-19 7:34 ` Johannes Thumshirn
2022-05-19 7:34 ` Johannes Thumshirn
2022-05-20 3:47 ` Damien Le Moal
2022-05-20 3:47 ` Damien Le Moal
2022-05-20 6:07 ` Hannes Reinecke
2022-05-20 6:07 ` Hannes Reinecke
2022-05-20 6:27 ` Javier González
2022-05-20 6:27 ` Javier González
2022-05-20 6:41 ` Damien Le Moal
2022-05-20 6:41 ` Damien Le Moal
[not found] ` <CGME20220520065941eucas1p105cf273ede995dc4bf92f3245fad09b1@eucas1p1.samsung.com>
2022-05-20 6:59 ` Javier González
2022-05-20 6:59 ` Javier González
2022-05-20 9:30 ` Pankaj Raghav
2022-05-20 9:30 ` Pankaj Raghav
2022-05-20 17:18 ` David Sterba
2022-05-20 17:18 ` David Sterba
2022-05-23 8:25 ` Pankaj Raghav
2022-05-23 8:25 ` Pankaj Raghav
2022-05-20 9:30 ` Johannes Thumshirn
2022-05-20 9:30 ` Johannes Thumshirn
[not found] ` <CGME20220520101610eucas1p1822ca6014e2a1d55ae74476f83c4de1d@eucas1p1.samsung.com>
2022-05-20 10:16 ` Javier González
2022-05-20 10:16 ` Javier González
[not found] <CGME20220516133922eucas1p1c891cd1d82539b4e792acb5d1aa74444@eucas1p1.samsung.com>
2022-05-16 13:39 ` Pankaj Raghav
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