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From: Bernd Schubert <[email protected]>
To: Ming Lei <[email protected]>, Jens Axboe <[email protected]>,
	"[email protected]" <[email protected]>,
	"[email protected]" <[email protected]>
Cc: "[email protected]" <[email protected]>,
	Miklos Szeredi <[email protected]>,
	ZiyangZhang <[email protected]>,
	Xiaoguang Wang <[email protected]>,
	Pavel Begunkov <[email protected]>,
	Stefan Hajnoczi <[email protected]>,
	Dan Williams <[email protected]>,
	Amir Goldstein <[email protected]>
Subject: Re: [PATCH V6 00/17] io_uring/ublk: add generic IORING_OP_FUSED_CMD
Date: Tue, 18 Apr 2023 19:38:03 +0000	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 3/30/23 13:36, Ming Lei wrote:
[...]
> V6:
> 	- re-design fused command, and make it more generic, moving sharing buffer
> 	as one plugin of fused command, so in future we can implement more plugins
> 	- document potential other use cases of fused command
> 	- drop support for builtin secondary sqe in SQE128, so all secondary
> 	  requests has standalone SQE
> 	- make fused command as one feature
> 	- cleanup & improve naming

Hi Ming, et al.,

I started to wonder if fused SQE could be extended to combine multiple 
syscalls, for example open/read/close.  Which would be another solution 
for the readfile syscall Miklos had proposed some time ago.

https://lore.kernel.org/lkml/CAJfpegusi8BjWFzEi05926d4RsEQvPnRW-w7My=ibBHQ8NgCuw@mail.gmail.com/

If fused SQEs could be extended, I think it would be quite helpful for 
many other patterns. Another similar examples would open/write/close, 
but ideal would be also to allow to have it more complex like 
"open/write/sync_file_range/close" - open/write/close might be the 
fastest and could possibly return before sync_file_range. Use case for 
the latter would be a file server that wants to give notifications to 
client when pages have been written out.


Thanks,
Bernd

  parent reply	other threads:[~2023-04-18 19:38 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-30 11:36 [PATCH V6 00/17] io_uring/ublk: add generic IORING_OP_FUSED_CMD Ming Lei
2023-03-30 11:36 ` [PATCH V6 01/17] io_uring: increase io_kiocb->flags into 64bit Ming Lei
2023-03-30 11:36 ` [PATCH V6 02/17] io_uring: use ctx->cached_sq_head to calculate left sqes Ming Lei
2023-03-30 11:36 ` [PATCH V6 03/17] io_uring: add generic IORING_OP_FUSED_CMD Ming Lei
2023-04-01 14:35   ` Ming Lei
2023-03-30 11:36 ` [PATCH V6 04/17] io_uring: support providing buffer by IORING_OP_FUSED_CMD Ming Lei
2023-03-30 11:36 ` [PATCH V6 05/17] io_uring: support OP_READ/OP_WRITE for fused secondary request Ming Lei
2023-03-30 11:36 ` [PATCH V6 06/17] io_uring: support OP_SEND_ZC/OP_RECV " Ming Lei
2023-03-30 11:36 ` [PATCH V6 07/17] block: ublk_drv: add common exit handling Ming Lei
2023-03-30 11:36 ` [PATCH V6 08/17] block: ublk_drv: don't consider flush request in map/unmap io Ming Lei
2023-03-30 11:36 ` [PATCH V6 09/17] block: ublk_drv: add two helpers to clean up map/unmap request Ming Lei
2023-03-30 11:36 ` [PATCH V6 10/17] block: ublk_drv: clean up several helpers Ming Lei
2023-03-30 11:36 ` [PATCH V6 11/17] block: ublk_drv: cleanup 'struct ublk_map_data' Ming Lei
2023-03-30 11:36 ` [PATCH V6 12/17] block: ublk_drv: cleanup ublk_copy_user_pages Ming Lei
2023-03-31 16:22   ` Bernd Schubert
2023-03-30 11:36 ` [PATCH V6 13/17] block: ublk_drv: grab request reference when the request is handled by userspace Ming Lei
2023-03-30 11:36 ` [PATCH V6 14/17] block: ublk_drv: support to copy any part of request pages Ming Lei
2023-03-30 11:36 ` [PATCH V6 15/17] block: ublk_drv: add read()/write() support for ublk char device Ming Lei
2023-03-30 11:36 ` [PATCH V6 16/17] block: ublk_drv: don't check buffer in case of zero copy Ming Lei
2023-03-30 11:36 ` [PATCH V6 17/17] block: ublk_drv: apply io_uring FUSED_CMD for supporting " Ming Lei
2023-03-31 19:13   ` Bernd Schubert
2023-04-01 13:19     ` Ming Lei
2023-03-31 19:55   ` Bernd Schubert
2023-04-01 13:22     ` Ming Lei
2023-04-03  9:25     ` Bernd Schubert
2023-04-03  1:11 ` [PATCH V6 00/17] io_uring/ublk: add generic IORING_OP_FUSED_CMD Ming Lei
2023-04-03  1:24   ` Jens Axboe
2023-04-04  7:48     ` Ming Lei
2023-04-03  1:23 ` (subset) " Jens Axboe
2023-04-18 19:38 ` Bernd Schubert [this message]
2023-04-19  1:51   ` Ming Lei
2023-04-19  9:56     ` Bernd Schubert
2023-04-19 11:19       ` Ming Lei
2023-04-19 15:42         ` Bernd Schubert
2023-04-20  1:18           ` Pavel Begunkov
2023-04-20  1:38           ` Ming Lei
2023-04-21 22:38             ` Bernd Schubert

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