From: Christoph Hellwig <hch@lst.de>
To: Javier Gonzalez <javier.gonz@samsung.com>
Cc: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
Keith Busch <kbusch@kernel.org>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Kanchan Joshi <joshi.k@samsung.com>,
"hare@suse.de" <hare@suse.de>,
"sagi@grimberg.me" <sagi@grimberg.me>,
"brauner@kernel.org" <brauner@kernel.org>,
"viro@zeniv.linux.org.uk" <viro@zeniv.linux.org.uk>,
"jack@suse.cz" <jack@suse.cz>,
"jaegeuk@kernel.org" <jaegeuk@kernel.org>,
"bcrl@kvack.org" <bcrl@kvack.org>,
"dhowells@redhat.com" <dhowells@redhat.com>,
"bvanassche@acm.org" <bvanassche@acm.org>,
"asml.silence@gmail.com" <asml.silence@gmail.com>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"io-uring@vger.kernel.org" <io-uring@vger.kernel.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-aio@kvack.org" <linux-aio@kvack.org>,
"gost.dev@samsung.com" <gost.dev@samsung.com>,
"vishak.g@samsung.com" <vishak.g@samsung.com>
Subject: Re: [PATCH v7 0/3] FDP and per-io hints
Date: Mon, 14 Oct 2024 09:47:08 +0200 [thread overview]
Message-ID: <20241014074708.GA22575@lst.de> (raw)
In-Reply-To: <34d3ad68068f4f87bf0a61ea8fb8f217@CAMSVWEXC02.scsc.local>
On Mon, Oct 14, 2024 at 07:02:11AM +0000, Javier Gonzalez wrote:
> > And exactly that is the problem. For file systems we can't support
> > that sanely. So IFF you absolutely want the per-I/O hints we need
> > an opt in by the file operations. I've said that at least twice
> > in this discussion before, but as everyone likes to have political
> > discussions instead of technical ones no one replied to that.
>
> Is it a way forward to add this in a new spin of the series - keeping the
> temperature mapping on the NVMe side?
What do you gain from that? NVMe does not understand data temperatures,
so why make up that claim? Especially as it directly undermindes any
file system work to actually make use of it.
> If not, what would be acceptable for a first version, before getting into adding
> a new interface to expose agnostic hints?
Just iterate on Kanchan's series for a block layer (and possible user level,
but that's less urgent) interface for stream separation?
next prev parent reply other threads:[~2024-10-14 7:47 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20240930182052epcas5p37edefa7556b87c3fbb543275756ac736@epcas5p3.samsung.com>
2024-09-30 18:13 ` [PATCH v7 0/3] FDP and per-io hints Kanchan Joshi
[not found] ` <CGME20240930182056epcas5p33f823c00caadf9388b509bafcad86f3d@epcas5p3.samsung.com>
2024-09-30 18:13 ` [PATCH v7 1/3] nvme: enable FDP support Kanchan Joshi
2024-10-02 18:37 ` Bart Van Assche
2024-10-03 12:55 ` Christoph Hellwig
[not found] ` <CGME20240930182100epcas5p31a010c225f3c76aa4dc54fced32abd2a@epcas5p3.samsung.com>
2024-09-30 18:13 ` [PATCH v7 2/3] block, fs: restore kiocb based write hint processing Kanchan Joshi
[not found] ` <CGME20240930182103epcas5p4c9e91ca3cdf20e900b1425ae45fef81d@epcas5p4.samsung.com>
2024-09-30 18:13 ` [PATCH v7 3/3] io_uring: enable per-io hinting capability Kanchan Joshi
2024-10-02 14:26 ` Pavel Begunkov
2024-10-17 14:58 ` Kanchan Joshi
2024-10-02 18:29 ` Bart Van Assche
2024-10-01 9:20 ` [PATCH v7 0/3] FDP and per-io hints Christoph Hellwig
2024-10-01 15:58 ` James R. Bergsten
2024-10-01 16:18 ` Jens Axboe
2024-10-02 7:51 ` Christoph Hellwig
2024-10-02 15:03 ` Jens Axboe
2024-10-02 15:13 ` Christoph Hellwig
2024-10-02 15:17 ` Keith Busch
2024-10-02 15:19 ` Christoph Hellwig
2024-10-02 15:33 ` Keith Busch
2024-10-03 12:51 ` Christoph Hellwig
2024-10-02 15:47 ` Martin K. Petersen
2024-10-02 18:34 ` Bart Van Assche
2024-10-03 12:55 ` Christoph Hellwig
2024-10-03 21:48 ` Keith Busch
2024-10-03 22:00 ` Bart Van Assche
2024-10-03 22:12 ` Jens Axboe
2024-10-03 22:17 ` Keith Busch
2024-10-04 6:21 ` Javier González
2024-10-04 6:24 ` Christoph Hellwig
2024-10-04 6:59 ` Javier González
2024-10-04 12:32 ` Christoph Hellwig
2024-10-07 11:29 ` Javier González
2024-10-08 12:27 ` Christoph Hellwig
2024-10-03 12:54 ` Christoph Hellwig
2024-10-03 22:14 ` Jens Axboe
2024-10-04 5:31 ` Christoph Hellwig
2024-10-04 6:18 ` Javier González
2024-10-04 6:27 ` Christoph Hellwig
2024-10-04 6:52 ` Javier González
2024-10-04 12:30 ` Christoph Hellwig
2024-10-07 10:10 ` Javier González
2024-10-08 10:06 ` Hans Holmberg
2024-10-09 14:36 ` Javier Gonzalez
2024-10-10 6:40 ` Hans Holmberg
2024-10-10 7:13 ` Javier Gonzalez
2024-10-10 9:20 ` Christoph Hellwig
2024-10-10 12:22 ` Javier Gonzalez
2024-10-11 8:56 ` Christoph Hellwig
2024-10-11 12:21 ` Javier Gonzalez
2024-10-11 16:59 ` Keith Busch
2024-10-10 10:46 ` Hans Holmberg
[not found] ` <CGME20241010122734eucas1p1e20a5263a4d69db81b50b8b03608fad1@eucas1p1.samsung.com>
2024-10-10 12:27 ` Javier Gonzalez
2024-10-11 8:59 ` Christoph Hellwig
2024-10-08 12:25 ` Christoph Hellwig
2024-10-08 14:44 ` Keith Busch
2024-10-09 9:28 ` Christoph Hellwig
2024-10-09 15:06 ` Keith Busch
[not found] ` <CGME20241010070738eucas1p2057209e5f669f37ca586ad4a619289ed@eucas1p2.samsung.com>
2024-10-10 7:07 ` Javier González
2024-10-10 9:13 ` Christoph Hellwig
2024-10-10 11:59 ` Javier González
2024-10-11 9:02 ` Christoph Hellwig
2024-10-11 17:08 ` Jens Axboe
2024-10-14 6:21 ` Christoph Hellwig
2024-10-14 7:02 ` Javier Gonzalez
2024-10-14 7:47 ` Christoph Hellwig [this message]
2024-10-14 9:08 ` Javier Gonzalez
2024-10-14 11:50 ` Christoph Hellwig
2024-10-15 3:07 ` Javier Gonzalez
2024-10-15 5:30 ` Christoph Hellwig
2024-10-10 9:10 ` Christoph Hellwig
2024-10-09 16:28 ` Nitesh Shetty
2024-10-02 15:22 ` Jens Axboe
2024-10-01 16:23 ` Keith Busch
2024-10-02 7:49 ` Christoph Hellwig
2024-10-02 14:56 ` Keith Busch
2024-10-02 15:00 ` Jens Axboe
2024-10-03 0:20 ` Bart Van Assche
2024-10-15 5:50 ` Christoph Hellwig
2024-10-15 15:09 ` Keith Busch
2024-10-15 15:22 ` Christoph Hellwig
2024-10-17 14:35 ` Kanchan Joshi
2024-10-17 15:23 ` Christoph Hellwig
2024-10-17 15:44 ` Keith Busch
2024-10-17 15:46 ` Christoph Hellwig
2024-10-17 16:06 ` Keith Busch
2024-10-17 16:15 ` Bart Van Assche
2024-10-17 16:23 ` Keith Busch
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