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From: Christoph Hellwig <hch@infradead.org>
To: Ming Lei <ming.lei@canonical.com>
Cc: linux-kernel@vger.kernel.org,
	Dave Kleikamp <dave.kleikamp@oracle.com>,
	Jens Axboe <axboe@kernel.dk>, Zach Brown <zab@zabbo.net>,
	Christoph Hellwig <hch@infradead.org>,
	Maxim Patlasov <mpatlasov@parallels.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Benjamin LaHaise <bcrl@kvack.org>
Subject: Re: [PATCH v2 0/4] block & aio: improve loop with kernel aio
Date: Tue, 13 Jan 2015 08:23:07 -0800	[thread overview]
Message-ID: <20150113162307.GA21338@infradead.org> (raw)
In-Reply-To: <1421163888-21452-1-git-send-email-ming.lei@canonical.com>

On Tue, Jan 13, 2015 at 11:44:44PM +0800, Ming Lei wrote:
> Follows benefits from using kernel aio in loop:
> 	- avoid double cache, and memory usage decreased a lot
> 	- system load gets much decreased

This seems to conflate two changes:

 1) use direct I/O
 2) use aio (require 1)

what numbers do you get when just using direct I/O?

  parent reply	other threads:[~2015-01-13 16:23 UTC|newest]

Thread overview: 25+ 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
2015-01-13 15:44   ` Ming Lei
2015-01-25 13:31   ` Christoph Hellwig
2015-01-26 16:18     ` Ming Lei
2015-01-26 16:18       ` Ming Lei
2015-01-26 17:00       ` Christoph Hellwig
2015-01-27 13:57         ` Ming Lei
2015-01-27 17:59       ` Christoph Hellwig
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 ` Christoph Hellwig [this message]
2015-01-14 10:17   ` [PATCH v2 0/4] block & aio: improve loop with kernel aio Ming Lei

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