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From: Keith Busch <kbusch@kernel.org>
To: David Fugate <david.fugate@linux.intel.com>
Cc: Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@lst.de>,
	Kanchan Joshi <joshi.k@samsung.com>,
	"Damien.LeMoal@wdc.com" <Damien.LeMoal@wdc.com>,
	"sagi@grimberg.me" <sagi@grimberg.me>,
	"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"johannes.thumshirn@wdc.com" <johannes.thumshirn@wdc.com>,
	Nitesh Shetty <nj.shetty@samsung.com>,
	SelvaKumar S <selvakuma.s1@samsung.com>,
	Javier Gonzalez <javier.gonz@samsung.com>,
	david.fugate@intel.com
Subject: Re: [PATCH 2/2] nvme: add emulation for zone-append
Date: Thu, 20 Aug 2020 12:45:39 +0900	[thread overview]
Message-ID: <20200820034539.GA12222@redsun51.ssa.fujisawa.hgst.com> (raw)
In-Reply-To: <d9cc3ece0c70b51c2d40998081375ad3fa39ece2.camel@linux.intel.com>

On Wed, Aug 19, 2020 at 05:43:29PM -0600, David Fugate wrote:
> There were queries? My key takeaways were a maintainer NAK followed by
> instructions to make the Intel drive align with the driver by
> implementing NOIOB. While I disagree with the rejection as it appeared
> to be based entirely on politics, I can accept it as the quirk wasn't
> in the spec.

For the record, the suggestion provided, which you agreed to look into,
most broadly enables your hardware on Linux and was entirely to your
benefit. Not quite as dramatic as a political conspiracy.

You later responded with a technical argument against that suggestion;
however, your reason didn't add up, and that's where you left the
thread.
 
> It's not fair to make this same "your drive should align with the
> driver" demand of Samsung because we *are* talking about a spec'ed
> feature here. Technical critques of their patches and real performance
> degrades observed are fair game and objective; "your company did
> the nastiest possible move violating the normal NVMe procedures to make
> it optional" is not.

Sure, but you're cherry picking comments from the discussion. The
performance impact exists, and it's generally not acceptable from a
maintenance point to duplicate significant code without at least trying
to provide a common solution. 

WARNING: multiple messages have this Message-ID (diff)
From: Keith Busch <kbusch@kernel.org>
To: David Fugate <david.fugate@linux.intel.com>
Cc: Jens Axboe <axboe@kernel.dk>,
	"Damien.LeMoal@wdc.com" <Damien.LeMoal@wdc.com>,
	SelvaKumar S <selvakuma.s1@samsung.com>,
	"sagi@grimberg.me" <sagi@grimberg.me>,
	Kanchan Joshi <joshi.k@samsung.com>,
	"johannes.thumshirn@wdc.com" <johannes.thumshirn@wdc.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
	Nitesh Shetty <nj.shetty@samsung.com>,
	david.fugate@intel.com, Javier Gonzalez <javier.gonz@samsung.com>,
	Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH 2/2] nvme: add emulation for zone-append
Date: Thu, 20 Aug 2020 12:45:39 +0900	[thread overview]
Message-ID: <20200820034539.GA12222@redsun51.ssa.fujisawa.hgst.com> (raw)
In-Reply-To: <d9cc3ece0c70b51c2d40998081375ad3fa39ece2.camel@linux.intel.com>

On Wed, Aug 19, 2020 at 05:43:29PM -0600, David Fugate wrote:
> There were queries? My key takeaways were a maintainer NAK followed by
> instructions to make the Intel drive align with the driver by
> implementing NOIOB. While I disagree with the rejection as it appeared
> to be based entirely on politics, I can accept it as the quirk wasn't
> in the spec.

For the record, the suggestion provided, which you agreed to look into,
most broadly enables your hardware on Linux and was entirely to your
benefit. Not quite as dramatic as a political conspiracy.

You later responded with a technical argument against that suggestion;
however, your reason didn't add up, and that's where you left the
thread.
 
> It's not fair to make this same "your drive should align with the
> driver" demand of Samsung because we *are* talking about a spec'ed
> feature here. Technical critques of their patches and real performance
> degrades observed are fair game and objective; "your company did
> the nastiest possible move violating the normal NVMe procedures to make
> it optional" is not.

Sure, but you're cherry picking comments from the discussion. The
performance impact exists, and it's generally not acceptable from a
maintenance point to duplicate significant code without at least trying
to provide a common solution. 

_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme

  reply	other threads:[~2020-08-20  3:45 UTC|newest]

Thread overview: 90+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20200818053247epcas5p262c5fd7e207dfa5145011c4329cf239d@epcas5p2.samsung.com>
2020-08-18  5:29 ` [PATCH 0/2] enable append-emulation for ZNS Kanchan Joshi
2020-08-18  5:29   ` Kanchan Joshi
     [not found]   ` <CGME20200818053252epcas5p4ee61d64bba5f6a131105e40330984f5e@epcas5p4.samsung.com>
2020-08-18  5:29     ` [PATCH 1/2] nvme: set io-scheduler requirement " Kanchan Joshi
2020-08-18  5:29       ` Kanchan Joshi
2020-08-18  7:11       ` Christoph Hellwig
2020-08-18  7:11         ` Christoph Hellwig
2020-08-19  9:26         ` Kanchan Joshi
2020-08-19  9:26           ` Kanchan Joshi
2020-08-19  9:38           ` Damien Le Moal
2020-08-19  9:38             ` Damien Le Moal
2020-08-19 10:31             ` Kanchan Joshi
2020-08-19 10:31               ` Kanchan Joshi
2020-08-19 11:17               ` Damien Le Moal
2020-08-19 11:17                 ` Damien Le Moal
2020-09-07  7:00                 ` Kanchan Joshi
2020-09-07  7:00                   ` Kanchan Joshi
2020-09-07  8:22                   ` Damien Le Moal
2020-09-07  8:22                     ` Damien Le Moal
2020-09-07 11:23                     ` Kanchan Joshi
2020-09-07 11:23                       ` Kanchan Joshi
2020-09-07 11:37                       ` Damien Le Moal
2020-09-07 11:37                         ` Damien Le Moal
2020-09-07 11:54                         ` Kanchan Joshi
2020-09-07 11:54                           ` Kanchan Joshi
2020-09-07 12:53                           ` Damien Le Moal
2020-09-07 12:53                             ` Damien Le Moal
     [not found]   ` <CGME20200818053256epcas5p46d0b66b3702192eb6617c8bba334c15f@epcas5p4.samsung.com>
2020-08-18  5:29     ` [PATCH 2/2] nvme: add emulation for zone-append Kanchan Joshi
2020-08-18  5:29       ` Kanchan Joshi
2020-08-18  7:12       ` Christoph Hellwig
2020-08-18  7:12         ` Christoph Hellwig
2020-08-18  9:50         ` Javier Gonzalez
2020-08-18  9:50           ` Javier Gonzalez
2020-08-18 10:51           ` Matias Bjørling
2020-08-18 10:51             ` Matias Bjørling
2020-08-18 18:11             ` Javier Gonzalez
2020-08-18 18:11               ` Javier Gonzalez
2020-08-18 15:50           ` Christoph Hellwig
2020-08-18 15:50             ` Christoph Hellwig
2020-08-18 18:04             ` Javier Gonzalez
2020-08-18 18:04               ` Javier Gonzalez
2020-08-19  7:40               ` Christoph Hellwig
2020-08-19  7:40                 ` Christoph Hellwig
2020-08-19  8:33                 ` Javier Gonzalez
2020-08-19  8:33                   ` Javier Gonzalez
2020-08-19  9:14                   ` Damien Le Moal
2020-08-19  9:14                     ` Damien Le Moal
2020-08-19 10:43                     ` Christoph Hellwig
2020-08-19 10:43                       ` Christoph Hellwig
2020-08-20  6:45                       ` Javier Gonzalez
2020-08-20  6:45                         ` Javier Gonzalez
2020-08-19 10:49                   ` Christoph Hellwig
2020-08-19 10:49                     ` Christoph Hellwig
2020-08-18 16:58           ` Keith Busch
2020-08-18 16:58             ` Keith Busch
2020-08-18 17:29             ` Javier Gonzalez
2020-08-18 17:29               ` Javier Gonzalez
2020-08-18 17:39               ` Keith Busch
2020-08-18 17:39                 ` Keith Busch
2020-08-18 18:13                 ` Javier Gonzalez
2020-08-18 18:13                   ` Javier Gonzalez
2020-08-19 19:11         ` David Fugate
2020-08-19 19:11           ` David Fugate
2020-08-19 19:25           ` Jens Axboe
2020-08-19 19:25             ` Jens Axboe
2020-08-19 21:54             ` David Fugate
2020-08-19 21:54               ` David Fugate
2020-08-19 22:10               ` Keith Busch
2020-08-19 22:10                 ` Keith Busch
2020-08-19 23:43                 ` David Fugate
2020-08-19 23:43                   ` David Fugate
2020-08-20  3:45                   ` Keith Busch [this message]
2020-08-20  3:45                     ` Keith Busch
2020-08-20 23:26                     ` David Fugate
2020-08-20 23:26                       ` David Fugate
2020-08-20  5:51                   ` Christoph Hellwig
2020-08-20  5:51                     ` Christoph Hellwig
2020-08-20  6:37             ` Javier Gonzalez
2020-08-20  6:37               ` Javier Gonzalez
2020-08-20  6:52               ` Christoph Hellwig
2020-08-20  6:52                 ` Christoph Hellwig
2020-08-20  8:03                 ` Javier Gonzalez
2020-08-20  8:03                   ` Javier Gonzalez
2020-08-19 21:42           ` Keith Busch
2020-08-19 21:42             ` Keith Busch
2020-08-20  7:37             ` Kanchan Joshi
2020-08-20  7:37               ` Kanchan Joshi
2020-08-20  8:14               ` Javier Gonzalez
2020-08-20  8:14                 ` Javier Gonzalez
2020-08-20  5:29           ` Christoph Hellwig
2020-08-20  5:29             ` Christoph Hellwig

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