From: Kanchan Joshi <joshi.k@samsung.com>
To: "Matias Bjørling" <mb@lightnvm.io>
Cc: axboe@kernel.dk, viro@zeniv.linux.org.uk, bcrl@kvack.org,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-aio@kvack.org, io-uring@vger.kernel.org,
linux-block@vger.kernel.org, selvakuma.s1@samsung.com,
nj.shetty@samsung.com, javier.gonz@samsung.com,
Damien Le Moal <Damien.LeMoal@wdc.com>,
Keith Busch <keith.busch@wdc.com>, Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH 0/3] zone-append support in aio and io-uring
Date: Fri, 19 Jun 2020 00:51:53 +0530 [thread overview]
Message-ID: <20200618192153.GA4141485@test-zns> (raw)
In-Reply-To: <f503c488-fa00-4fe2-1ceb-7093ea429e45@lightnvm.io>
[-- Attachment #1: Type: text/plain, Size: 1359 bytes --]
On Thu, Jun 18, 2020 at 10:04:32AM +0200, Matias Bjørling wrote:
>On 17/06/2020 19.23, Kanchan Joshi wrote:
>>This patchset enables issuing zone-append using aio and io-uring direct-io interface.
>>
>>For aio, this introduces opcode IOCB_CMD_ZONE_APPEND. Application uses start LBA
>>of the zone to issue append. On completion 'res2' field is used to return
>>zone-relative offset.
>>
>>For io-uring, this introduces three opcodes: IORING_OP_ZONE_APPEND/APPENDV/APPENDV_FIXED.
>>Since io_uring does not have aio-like res2, cqe->flags are repurposed to return zone-relative offset
>
>Please provide a pointers to applications that are updated and ready
>to take advantage of zone append.
>
>I do not believe it's beneficial at this point to change the libaio
>API, applications that would want to use this API, should anyway
>switch to use io_uring.
>
>Please also note that applications and libraries that want to take
>advantage of zone append, can already use the zonefs file-system, as
>it will use the zone append command when applicable.
AFAIK, zonefs uses append while serving synchronous I/O. And append bio
is waited upon synchronously. That maybe serving some purpose I do
not know currently. But it seems applications using zonefs file
abstraction will get benefitted if they could use the append themselves to
carry the I/O, asynchronously.
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next prev parent reply other threads:[~2020-06-18 19:24 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20200617172653epcas5p488de50090415eb802e62acc0e23d8812@epcas5p4.samsung.com>
2020-06-17 17:23 ` [PATCH 0/3] zone-append support in aio and io-uring Kanchan Joshi
[not found] ` <CGME20200617172702epcas5p4dbf4729d31d9a85ab1d261d04f238e61@epcas5p4.samsung.com>
2020-06-17 17:23 ` [PATCH 1/3] fs,block: Introduce IOCB_ZONE_APPEND and direct-io handling Kanchan Joshi
2020-06-17 19:02 ` Pavel Begunkov
2020-06-18 7:16 ` Damien Le Moal
2020-06-18 18:35 ` Kanchan Joshi
[not found] ` <CGME20200617172706epcas5p4dcbc164063f58bad95b211b9d6dfbfa9@epcas5p4.samsung.com>
2020-06-17 17:23 ` [PATCH 2/3] aio: add support for zone-append Kanchan Joshi
2020-06-18 7:33 ` Damien Le Moal
[not found] ` <CGME20200617172713epcas5p352f2907a12bd4ee3c97be1c7d8e1569e@epcas5p3.samsung.com>
2020-06-17 17:23 ` [PATCH 3/3] io_uring: " Kanchan Joshi
2020-06-17 18:55 ` Pavel Begunkov
2020-06-18 7:39 ` Damien Le Moal
2020-06-18 8:35 ` javier.gonz@samsung.com
2020-06-18 8:47 ` Damien Le Moal
2020-06-18 9:11 ` javier.gonz@samsung.com
2020-06-19 9:41 ` javier.gonz@samsung.com
2020-06-19 11:15 ` Matias Bjørling
2020-06-19 14:18 ` Jens Axboe
2020-06-19 15:14 ` Matias Bjørling
2020-06-19 15:20 ` Jens Axboe
2020-06-19 15:40 ` Matias Bjørling
2020-06-19 15:44 ` Jens Axboe
2020-06-21 18:55 ` javier.gonz@samsung.com
2020-06-19 14:15 ` Jens Axboe
2020-06-19 14:59 ` Pavel Begunkov
2020-06-19 15:02 ` Jens Axboe
2020-06-21 18:52 ` javier.gonz@samsung.com
2020-06-17 17:42 ` [PATCH 0/3] zone-append support in aio and io-uring Matthew Wilcox
2020-06-18 6:56 ` Christoph Hellwig
2020-06-18 8:29 ` Javier González
2020-06-18 17:52 ` Kanchan Joshi
2020-06-19 3:08 ` Damien Le Moal
2020-06-19 7:56 ` Christoph Hellwig
2020-06-18 8:04 ` Matias Bjørling
2020-06-18 8:27 ` Javier González
2020-06-18 8:32 ` Matias Bjørling
2020-06-18 8:39 ` Javier González
2020-06-18 8:46 ` Matias Bjørling
2020-06-18 14:16 ` Christoph Hellwig
2020-06-18 19:21 ` Kanchan Joshi [this message]
2020-06-18 20:04 ` Matias Bjørling
2020-06-19 1:03 ` Damien Le Moal
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