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From: Christoph Hellwig <hch@infradead.org>
To: Ming Lei <ming.lei@canonical.com>
Cc: Christoph Hellwig <hch@infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Dave Kleikamp <dave.kleikamp@oracle.com>,
	Jens Axboe <axboe@kernel.dk>, Zach Brown <zab@zabbo.net>,
	Maxim Patlasov <mpatlasov@parallels.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Benjamin LaHaise <bcrl@kvack.org>,
	Linux FS Devel <linux-fsdevel@vger.kernel.org>,
	"open list:AIO" <linux-aio@kvack.org>
Subject: Re: [PATCH v2 1/4] aio: add aio_kernel_() interface
Date: Mon, 26 Jan 2015 09:00:48 -0800	[thread overview]
Message-ID: <20150126170048.GA2080@infradead.org> (raw)
In-Reply-To: <CACVXFVOzjroTqcgduqvKzcDVvNvO4xGX6go3+ZspfQkz3_2zAQ@mail.gmail.com>

On Tue, Jan 27, 2015 at 12:18:23AM +0800, Ming Lei wrote:
> > Also it might make sense to just offer aio_kernel_read/write intefaces
> > instead of the common submit wrapper, as that's much closer to other
> > kernel APIs, e.g.
> >
> > int aio_kernel_read(struct kiocb *iocb, struct file *file,
> >                 struct iov_iter *iter, loff_t off,
> >                 void (*complete)(struct kiocb *iocb, long res));
> > int aio_kernel_write(struct kiocb *iocb, struct file *file,
> >                 struct iov_iter *iter, loff_t off,
> >                 void (*complete)(struct kiocb *iocb, long res));
> 
> It is like style of sync APIs, looks submit/complete is common
> for async APIs, like io_submit().

io_submit is a fairly horrible API.  While Posix AIO isn't too much
better it does have separate APIs for read/write.  Given that there
isn't much code shared I'd keep an API that feels familar.


  reply	other threads:[~2015-01-26 17:00 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-13 15:44 [PATCH v2 0/4] block & aio: improve loop with kernel aio Ming Lei
2015-01-13 15:44 ` [PATCH v2 1/4] aio: add aio_kernel_() interface Ming Lei
2015-01-25 13:31   ` Christoph Hellwig
2015-01-26 16:18     ` Ming Lei
2015-01-26 17:00       ` Christoph Hellwig [this message]
2015-01-27 13:57         ` Ming Lei
2015-01-27 17:59       ` Christoph Hellwig
2015-01-13 15:44 ` [PATCH v2 2/4] fd/direct-io: introduce should_dirty for kernel aio Ming Lei
2015-01-25 13:34   ` Christoph Hellwig
2015-01-27 16:05     ` Ming Lei
2015-01-13 15:44 ` [PATCH v2 3/4] block: loop: introduce 'use_aio' sysfs file Ming Lei
2015-01-25 13:35   ` Christoph Hellwig
2015-01-27  5:26     ` Ming Lei
2015-01-26 17:57   ` Jeff Moyer
2015-01-13 15:44 ` [PATCH v2 4/4] block: loop: support to submit I/O via kernel aio based Ming Lei
2015-01-25 13:40   ` Christoph Hellwig
2015-03-18 18:28   ` Maxim Patlasov
2015-03-19  2:57     ` Ming Lei
2015-03-19 16:37       ` Maxim Patlasov
2015-03-20  5:27         ` Ming Lei
2015-01-13 16:23 ` [PATCH v2 0/4] block & aio: improve loop with kernel aio Christoph Hellwig
2015-01-14 10:17   ` Ming Lei

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