From: Avi Kivity <avi@redhat.com>
To: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: Pavel Machek <pavel@ucw.cz>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
jeremy@goop.org, hugh.dickins@tiscali.co.uk, ngupta@vflare.org,
JBeulich@novell.com, chris.mason@oracle.com,
kurt.hackel@oracle.com, dave.mccracken@oracle.com,
npiggin@suse.de, akpm@linux-foundation.org, riel@redhat.com
Subject: Re: Frontswap [PATCH 0/4] (was Transcendent Memory): overview
Date: Thu, 29 Apr 2010 22:01:57 +0300 [thread overview]
Message-ID: <4BD9D7A5.1070003@redhat.com> (raw)
In-Reply-To: <4BD9D702.90209@redhat.com>
On 04/29/2010 09:59 PM, Avi Kivity wrote:
>
> I'm convinced it's useful. The API is so close to a block device
> (read/write with key/value vs read/write with sector/value) that we
> should make the effort not to introduce a new API.
>
Plus of course the asynchronity and batching of the block layer. Even
if you don't use a dma engine, you improve performance by exiting one
per several dozen pages instead of for every page, perhaps enough to
allow the hypervisor to justify copying the memory with non-temporal moves.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi@redhat.com>
To: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: Pavel Machek <pavel@ucw.cz>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
jeremy@goop.org, hugh.dickins@tiscali.co.uk, ngupta@vflare.org,
JBeulich@novell.com, chris.mason@oracle.com,
kurt.hackel@oracle.com, dave.mccracken@oracle.com,
npiggin@suse.de, akpm@linux-foundation.org, riel@redhat.com
Subject: Re: Frontswap [PATCH 0/4] (was Transcendent Memory): overview
Date: Thu, 29 Apr 2010 22:01:57 +0300 [thread overview]
Message-ID: <4BD9D7A5.1070003@redhat.com> (raw)
In-Reply-To: <4BD9D702.90209@redhat.com>
On 04/29/2010 09:59 PM, Avi Kivity wrote:
>
> I'm convinced it's useful. The API is so close to a block device
> (read/write with key/value vs read/write with sector/value) that we
> should make the effort not to introduce a new API.
>
Plus of course the asynchronity and batching of the block layer. Even
if you don't use a dma engine, you improve performance by exiting one
per several dozen pages instead of for every page, perhaps enough to
allow the hypervisor to justify copying the memory with non-temporal moves.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
--
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next prev parent reply other threads:[~2010-04-30 18:23 UTC|newest]
Thread overview: 163+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-22 13:42 Frontswap [PATCH 0/4] (was Transcendent Memory): overview Dan Magenheimer
2010-04-22 13:42 ` Dan Magenheimer
2010-04-22 15:28 ` Avi Kivity
2010-04-22 15:28 ` Avi Kivity
2010-04-22 15:48 ` Dan Magenheimer
2010-04-22 15:48 ` Dan Magenheimer
2010-04-22 16:13 ` Avi Kivity
2010-04-22 16:13 ` Avi Kivity
2010-04-22 20:15 ` Dan Magenheimer
2010-04-22 20:15 ` Dan Magenheimer
2010-04-23 9:48 ` Avi Kivity
2010-04-23 9:48 ` Avi Kivity
2010-04-23 13:47 ` Dan Magenheimer
2010-04-23 13:47 ` Dan Magenheimer
2010-04-23 13:57 ` Avi Kivity
2010-04-23 13:57 ` Avi Kivity
2010-04-23 14:43 ` Dan Magenheimer
2010-04-23 14:43 ` Dan Magenheimer
2010-04-23 14:52 ` Avi Kivity
2010-04-23 14:52 ` Avi Kivity
2010-04-23 15:00 ` Avi Kivity
2010-04-23 15:00 ` Avi Kivity
2010-04-23 16:26 ` Dan Magenheimer
2010-04-23 16:26 ` Dan Magenheimer
2010-04-24 18:25 ` Avi Kivity
2010-04-24 18:25 ` Avi Kivity
[not found] ` <1c02a94a-a6aa-4cbb-a2e6-9d4647760e91@default4BD43033.7090706@redhat.com>
2010-04-25 0:41 ` Dan Magenheimer
2010-04-25 0:41 ` Dan Magenheimer
2010-04-25 12:06 ` Avi Kivity
2010-04-25 12:06 ` Avi Kivity
2010-04-25 13:12 ` Dan Magenheimer
2010-04-25 13:12 ` Dan Magenheimer
2010-04-25 13:18 ` Avi Kivity
2010-04-25 13:18 ` Avi Kivity
2010-04-28 5:55 ` Pavel Machek
2010-04-28 5:55 ` Pavel Machek
2010-04-29 14:42 ` Dan Magenheimer
2010-04-29 14:42 ` Dan Magenheimer
2010-04-29 18:59 ` Avi Kivity
2010-04-29 18:59 ` Avi Kivity
2010-04-29 19:01 ` Avi Kivity [this message]
2010-04-29 19:01 ` Avi Kivity
2010-04-29 18:53 ` Avi Kivity
2010-04-29 18:53 ` Avi Kivity
2010-04-30 1:45 ` Dave Hansen
2010-04-30 1:45 ` Dave Hansen
2010-04-30 7:13 ` Avi Kivity
2010-04-30 7:13 ` Avi Kivity
2010-04-30 15:59 ` Dan Magenheimer
2010-04-30 15:59 ` Dan Magenheimer
2010-04-30 16:08 ` Dave Hansen
2010-04-30 16:08 ` Dave Hansen
2010-05-10 16:05 ` Martin Schwidefsky
2010-05-10 16:05 ` Martin Schwidefsky
2010-04-30 16:16 ` Avi Kivity
2010-04-30 16:16 ` Avi Kivity
[not found] ` <4BDB18CE.2090608@goop.org4BDB2069.4000507@redhat.com>
[not found] ` <3a62a058-7976-48d7-acd2-8c6a8312f10f@default20100502071059.GF1790@ucw.cz>
2010-04-30 16:43 ` Dan Magenheimer
2010-04-30 16:43 ` Dan Magenheimer
2010-04-30 17:10 ` Dave Hansen
2010-04-30 17:10 ` Dave Hansen
2010-04-30 18:08 ` Avi Kivity
2010-04-30 18:08 ` Avi Kivity
2010-04-30 17:52 ` Jeremy Fitzhardinge
2010-04-30 17:52 ` Jeremy Fitzhardinge
2010-04-30 18:24 ` Avi Kivity
2010-04-30 18:24 ` Avi Kivity
2010-04-30 18:59 ` Jeremy Fitzhardinge
2010-04-30 18:59 ` Jeremy Fitzhardinge
2010-05-01 8:28 ` Avi Kivity
2010-05-01 8:28 ` Avi Kivity
2010-05-01 17:10 ` Dan Magenheimer
2010-05-01 17:10 ` Dan Magenheimer
2010-05-02 7:11 ` Pavel Machek
2010-05-02 7:11 ` Pavel Machek
2010-05-02 15:05 ` Dan Magenheimer
2010-05-02 15:05 ` Dan Magenheimer
2010-05-02 20:06 ` Pavel Machek
2010-05-02 20:06 ` Pavel Machek
2010-05-02 21:05 ` Dan Magenheimer
2010-05-02 21:05 ` Dan Magenheimer
2010-05-02 7:57 ` Nitin Gupta
2010-05-02 7:57 ` Nitin Gupta
2010-05-02 16:06 ` Dan Magenheimer
2010-05-02 16:06 ` Dan Magenheimer
2010-05-02 16:48 ` Avi Kivity
2010-05-02 16:48 ` Avi Kivity
2010-05-02 17:22 ` Dan Magenheimer
2010-05-02 17:22 ` Dan Magenheimer
2010-05-03 9:39 ` Avi Kivity
2010-05-03 9:39 ` Avi Kivity
2010-05-03 14:59 ` Dan Magenheimer
2010-05-03 14:59 ` Dan Magenheimer
2010-05-02 15:35 ` Avi Kivity
2010-05-02 15:35 ` Avi Kivity
2010-05-02 17:06 ` Dan Magenheimer
2010-05-02 17:06 ` Dan Magenheimer
2010-05-03 8:46 ` Avi Kivity
2010-05-03 8:46 ` Avi Kivity
2010-05-03 16:01 ` Dan Magenheimer
2010-05-03 16:01 ` Dan Magenheimer
2010-05-03 19:32 ` Pavel Machek
2010-05-03 19:32 ` Pavel Machek
2010-04-30 16:04 ` Dave Hansen
2010-04-30 16:04 ` Dave Hansen
2010-04-23 15:56 ` Dan Magenheimer
2010-04-23 15:56 ` Dan Magenheimer
2010-04-24 18:22 ` Avi Kivity
2010-04-24 18:22 ` Avi Kivity
2010-04-25 0:30 ` Dan Magenheimer
2010-04-25 0:30 ` Dan Magenheimer
2010-04-25 12:11 ` Avi Kivity
2010-04-25 12:11 ` Avi Kivity
[not found] ` <c5062f3a-3232-4b21-b032-2ee1f2485ff0@default4BD44E74.2020506@redhat.com>
2010-04-25 13:37 ` Dan Magenheimer
2010-04-25 13:37 ` Dan Magenheimer
2010-04-25 14:15 ` Avi Kivity
2010-04-25 14:15 ` Avi Kivity
2010-04-25 15:29 ` Dan Magenheimer
2010-04-25 15:29 ` Dan Magenheimer
2010-04-26 6:01 ` Avi Kivity
2010-04-26 6:01 ` Avi Kivity
2010-04-26 12:45 ` Dan Magenheimer
2010-04-26 12:45 ` Dan Magenheimer
2010-04-26 13:48 ` Avi Kivity
2010-04-26 13:48 ` Avi Kivity
2010-04-27 12:56 ` Pavel Machek
2010-04-27 12:56 ` Pavel Machek
2010-04-27 14:32 ` Dan Magenheimer
2010-04-27 14:32 ` Dan Magenheimer
2010-04-29 13:02 ` Pavel Machek
2010-04-29 13:02 ` Pavel Machek
2010-04-27 11:52 ` Valdis.Kletnieks
2010-04-27 0:49 ` Jeremy Fitzhardinge
2010-04-27 0:49 ` Jeremy Fitzhardinge
2010-04-27 12:55 ` Pavel Machek
2010-04-27 12:55 ` Pavel Machek
2010-04-27 14:43 ` Nitin Gupta
2010-04-27 14:43 ` Nitin Gupta
2010-04-29 13:04 ` Pavel Machek
2010-04-29 13:04 ` Pavel Machek
2010-04-24 1:49 ` Nitin Gupta
2010-04-24 1:49 ` Nitin Gupta
2010-04-24 18:27 ` Avi Kivity
2010-04-24 18:27 ` Avi Kivity
2010-04-25 3:11 ` Nitin Gupta
2010-04-25 3:11 ` Nitin Gupta
2010-04-25 12:16 ` Avi Kivity
2010-04-25 12:16 ` Avi Kivity
2010-04-25 16:05 ` Nitin Gupta
2010-04-25 16:05 ` Nitin Gupta
2010-04-26 6:06 ` Avi Kivity
2010-04-26 6:06 ` Avi Kivity
2010-04-26 12:50 ` Dan Magenheimer
2010-04-26 12:50 ` Dan Magenheimer
2010-04-26 13:43 ` Avi Kivity
2010-04-26 13:43 ` Avi Kivity
2010-04-27 8:29 ` Dan Magenheimer
2010-04-27 8:29 ` Dan Magenheimer
2010-04-27 9:21 ` Avi Kivity
2010-04-27 9:21 ` Avi Kivity
2010-04-26 13:47 ` Nitin Gupta
2010-04-26 13:47 ` Nitin Gupta
2010-04-23 16:35 ` Jiahua
2010-04-23 16:35 ` Jiahua
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