From: Johannes Thumshirn <Johannes.Thumshirn@wdc.com>
To: "Javier González" <javier@javigon.com>, "Hannes Reinecke" <hare@suse.de>
Cc: Christoph Hellwig <hch@lst.de>,
SelvaKumar S <selvakuma.s1@samsung.com>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"kbusch@kernel.org" <kbusch@kernel.org>,
"axboe@kernel.dk" <axboe@kernel.dk>,
Damien Le Moal <Damien.LeMoal@wdc.com>,
"sagi@grimberg.me" <sagi@grimberg.me>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"dm-devel@redhat.com" <dm-devel@redhat.com>,
"snitzer@redhat.com" <snitzer@redhat.com>,
"selvajove@gmail.com" <selvajove@gmail.com>,
"nj.shetty@samsung.com" <nj.shetty@samsung.com>,
"joshi.k@samsung.com" <joshi.k@samsung.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Bart Van Assche <bvanassche@acm.org>,
Mikulas Patocka <mpatocka@redhat.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>
Subject: Re: [RFC PATCH v2 0/2] add simple copy support
Date: Tue, 8 Dec 2020 08:40:41 +0000 [thread overview]
Message-ID: <SN4PR0401MB35988951265391511EBC8C6E9BCD0@SN4PR0401MB3598.namprd04.prod.outlook.com> (raw)
In-Reply-To: 20201207192453.vc6clbdhz73hzs7l@mpHalley
On 07/12/2020 20:27, Javier González wrote:
> Good point. We can share some performance data on how Simple Copy scales
> in terms of bw / latency and the CPU usage. Do you have anything else in
> mind?
>
With an emulation in the kernel, we could make the usd "backend"
implementation configurable. So if the emulation is faster, users can select
the emulation, if the device is faster then the device.
Kind of what the crypto and raid code do as well.
I'm really interested in this work, as BTRFS relocation/balance will have
potential benefits, but we need to get it right.
WARNING: multiple messages have this Message-ID (diff)
From: Johannes Thumshirn <Johannes.Thumshirn@wdc.com>
To: "Javier González" <javier@javigon.com>, "Hannes Reinecke" <hare@suse.de>
Cc: "axboe@kernel.dk" <axboe@kernel.dk>,
Damien Le Moal <Damien.LeMoal@wdc.com>,
SelvaKumar S <selvakuma.s1@samsung.com>,
"sagi@grimberg.me" <sagi@grimberg.me>,
"snitzer@redhat.com" <snitzer@redhat.com>,
"selvajove@gmail.com" <selvajove@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"nj.shetty@samsung.com" <nj.shetty@samsung.com>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"dm-devel@redhat.com" <dm-devel@redhat.com>,
Mikulas Patocka <mpatocka@redhat.com>,
"joshi.k@samsung.com" <joshi.k@samsung.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
"kbusch@kernel.org" <kbusch@kernel.org>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
Christoph Hellwig <hch@lst.de>,
Bart Van Assche <bvanassche@acm.org>
Subject: Re: [RFC PATCH v2 0/2] add simple copy support
Date: Tue, 8 Dec 2020 08:40:41 +0000 [thread overview]
Message-ID: <SN4PR0401MB35988951265391511EBC8C6E9BCD0@SN4PR0401MB3598.namprd04.prod.outlook.com> (raw)
In-Reply-To: 20201207192453.vc6clbdhz73hzs7l@mpHalley
On 07/12/2020 20:27, Javier González wrote:
> Good point. We can share some performance data on how Simple Copy scales
> in terms of bw / latency and the CPU usage. Do you have anything else in
> mind?
>
With an emulation in the kernel, we could make the usd "backend"
implementation configurable. So if the emulation is faster, users can select
the emulation, if the device is faster then the device.
Kind of what the crypto and raid code do as well.
I'm really interested in this work, as BTRFS relocation/balance will have
potential benefits, but we need to get it right.
_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme
WARNING: multiple messages have this Message-ID (diff)
From: Johannes Thumshirn <Johannes.Thumshirn@wdc.com>
To: "Javier González" <javier@javigon.com>, "Hannes Reinecke" <hare@suse.de>
Cc: "axboe@kernel.dk" <axboe@kernel.dk>,
Damien Le Moal <Damien.LeMoal@wdc.com>,
SelvaKumar S <selvakuma.s1@samsung.com>,
"sagi@grimberg.me" <sagi@grimberg.me>,
"snitzer@redhat.com" <snitzer@redhat.com>,
"selvajove@gmail.com" <selvajove@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"nj.shetty@samsung.com" <nj.shetty@samsung.com>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"dm-devel@redhat.com" <dm-devel@redhat.com>,
Patocka <mpatocka@redhat.com>,
Mikulas, "joshi.k@samsung.com" <joshi.k@samsung.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
"kbusch@kernel.org" <kbusch@kernel.org>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
Christoph Hellwig <hch@lst.de>,
Bart Van Assche <bvanassche@acm.org>
Subject: Re: [dm-devel] [RFC PATCH v2 0/2] add simple copy support
Date: Tue, 8 Dec 2020 08:40:41 +0000 [thread overview]
Message-ID: <SN4PR0401MB35988951265391511EBC8C6E9BCD0@SN4PR0401MB3598.namprd04.prod.outlook.com> (raw)
In-Reply-To: 20201207192453.vc6clbdhz73hzs7l@mpHalley
On 07/12/2020 20:27, Javier González wrote:
> Good point. We can share some performance data on how Simple Copy scales
> in terms of bw / latency and the CPU usage. Do you have anything else in
> mind?
>
With an emulation in the kernel, we could make the usd "backend"
implementation configurable. So if the emulation is faster, users can select
the emulation, if the device is faster then the device.
Kind of what the crypto and raid code do as well.
I'm really interested in this work, as BTRFS relocation/balance will have
potential benefits, but we need to get it right.
--
dm-devel mailing list
dm-devel@redhat.com
https://www.redhat.com/mailman/listinfo/dm-devel
next prev parent reply other threads:[~2020-12-08 8:41 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20201204094719epcas5p23b3c41223897de3840f92ae3c229cda5@epcas5p2.samsung.com>
2020-12-04 9:46 ` [RFC PATCH v2 0/2] add simple copy support SelvaKumar S
2020-12-04 9:46 ` [dm-devel] " SelvaKumar S
2020-12-04 9:46 ` SelvaKumar S
[not found] ` <CGME20201204094731epcas5p307fe5a0b9360c5057cd48e42c9300053@epcas5p3.samsung.com>
2020-12-04 9:46 ` [RFC PATCH v2 1/2] block: " SelvaKumar S
2020-12-04 9:46 ` [dm-devel] " SelvaKumar S
2020-12-04 9:46 ` SelvaKumar S
2020-12-09 4:19 ` [dm-devel] " Martin K. Petersen
2020-12-09 4:19 ` Martin K. Petersen
2020-12-09 4:19 ` Martin K. Petersen
2020-12-09 5:17 ` Damien Le Moal
2020-12-09 5:17 ` Damien Le Moal
2020-12-09 5:17 ` Damien Le Moal
[not found] ` <CGME20201204094747epcas5p121b6eccf78a29ed4cba7c22d6b42d160@epcas5p1.samsung.com>
2020-12-04 9:46 ` [RFC PATCH v2 2/2] nvme: " SelvaKumar S
2020-12-04 9:46 ` [dm-devel] " SelvaKumar S
2020-12-04 9:46 ` SelvaKumar S
2020-12-04 11:25 ` [RFC PATCH v2 0/2] " Damien Le Moal
2020-12-04 11:25 ` [dm-devel] " Damien Le Moal
2020-12-04 11:25 ` Damien Le Moal
2020-12-04 14:40 ` Keith Busch
2020-12-04 14:40 ` [dm-devel] " Keith Busch
2020-12-04 14:40 ` Keith Busch
2020-12-07 7:46 ` javier.gonz@samsung.com
2020-12-07 7:46 ` [dm-devel] " javier.gonz@samsung.com
2020-12-07 7:46 ` javier.gonz@samsung.com
2020-12-07 8:06 ` Damien Le Moal
2020-12-07 8:06 ` [dm-devel] " Damien Le Moal
2020-12-07 8:06 ` Damien Le Moal
2020-12-07 8:16 ` javier.gonz@samsung.com
2020-12-07 8:16 ` [dm-devel] " javier.gonz@samsung.com
2020-12-07 8:16 ` javier.gonz@samsung.com
2020-12-07 9:01 ` Damien Le Moal
2020-12-07 9:01 ` [dm-devel] " Damien Le Moal
2020-12-07 9:01 ` Damien Le Moal
2020-12-07 14:11 ` Christoph Hellwig
2020-12-07 14:11 ` [dm-devel] " Christoph Hellwig
2020-12-07 14:11 ` Christoph Hellwig
2020-12-07 14:56 ` Hannes Reinecke
2020-12-07 14:56 ` [dm-devel] " Hannes Reinecke
2020-12-07 14:56 ` Hannes Reinecke
2020-12-07 19:24 ` Javier González
2020-12-07 19:24 ` [dm-devel] " Javier González
2020-12-07 19:24 ` Javier González
2020-12-08 8:40 ` Johannes Thumshirn [this message]
2020-12-08 8:40 ` [dm-devel] " Johannes Thumshirn
2020-12-08 8:40 ` Johannes Thumshirn
2020-12-08 12:22 ` Javier González
2020-12-08 12:22 ` [dm-devel] " Javier González
2020-12-08 12:22 ` Javier González
2020-12-08 12:37 ` Johannes Thumshirn
2020-12-08 12:37 ` [dm-devel] " Johannes Thumshirn
2020-12-08 12:37 ` Johannes Thumshirn
2020-12-08 13:13 ` Javier González
2020-12-08 13:13 ` [dm-devel] " Javier González
2020-12-08 13:13 ` Javier González
2020-12-08 13:24 ` Johannes Thumshirn
2020-12-08 13:24 ` [dm-devel] " Johannes Thumshirn
2020-12-08 13:24 ` Johannes Thumshirn
2020-12-09 9:17 ` Javier González
2020-12-09 9:17 ` [dm-devel] " Javier González
2020-12-09 9:17 ` Javier González
2020-12-15 23:45 ` Pavel Machek
2020-12-15 23:45 ` [dm-devel] " Pavel Machek
2020-12-15 23:45 ` Pavel Machek
2020-12-07 22:12 ` Douglas Gilbert
2020-12-07 22:12 ` [dm-devel] " Douglas Gilbert
2020-12-07 22:12 ` Douglas Gilbert
2020-12-08 6:44 ` Hannes Reinecke
2020-12-08 6:44 ` [dm-devel] " Hannes Reinecke
2020-12-08 6:44 ` Hannes Reinecke
2020-12-08 12:21 ` Javier González
2020-12-08 12:21 ` [dm-devel] " Javier González
2020-12-08 12:21 ` Javier González
2020-12-09 3:02 ` Martin K. Petersen
2020-12-09 3:02 ` [dm-devel] " Martin K. Petersen
2020-12-09 3:02 ` Martin K. Petersen
2020-12-07 19:14 ` Javier González
2020-12-07 19:14 ` [dm-devel] " Javier González
2020-12-07 19:14 ` Javier González
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