From: Avi Kivity <avi@redhat.com>
To: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: npiggin@suse.de, akpm@osdl.org, xen-devel@lists.xensource.com,
tmem-devel@oss.oracle.com, kurt.hackel@oracle.com,
Rusty Russell <rusty@rustcorp.com.au>,
jeremy@goop.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, sunil.mushran@oracle.com,
chris.mason@oracle.com, Anthony Liguori <anthony@codemonkey.ws>,
Schwidefsky <schwidefsky@de.ibm.com>,
dave.mccracken@oracle.com, Marcelo Tosatti <mtosatti@redhat.com>,
alan@lxorguk.ukuu.org.uk,
Balbir Singh <balbir@linux.vnet.ibm.com>
Subject: Re: [Xen-devel] Re: [RFC PATCH 0/4] (Take 2): transcendent memory ("tmem") for Linux
Date: Sun, 12 Jul 2009 23:43:30 +0300 [thread overview]
Message-ID: <4A5A4AF2.40609@redhat.com> (raw)
In-Reply-To: <e60ab548-f0be-4a75-a10b-1f2eb89247a7@default>
On 07/12/2009 11:39 PM, Dan Magenheimer wrote:
>> Right, the transient uses of tmem when applied to disk objects
>> (swap/pagecache) are very similar to disk caches. Which is
>> why you can
>> get a very similar effect when caching your virtual disks;
>> this can be
>> done without any guest modification.
>>
>
> Write-through backing and virtual disk cacheing offer a
> similar effect, but it is far from the same.
>
Can you explain how it differs for the swap case? Maybe I don't
understand how tmem preswap works.
--
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: npiggin@suse.de, akpm@osdl.org, xen-devel@lists.xensource.com,
tmem-devel@oss.oracle.com, kurt.hackel@oracle.com,
Rusty Russell <rusty@rustcorp.com.au>,
jeremy@goop.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, sunil.mushran@oracle.com,
chris.mason@oracle.com, Anthony Liguori <anthony@codemonkey.ws>,
Schwidefsky <schwidefsky@de.ibm.com>,
dave.mccracken@oracle.com, Marcelo Tosatti <mtosatti@redhat.com>,
alan@lxorguk.ukuu.org.uk,
Balbir Singh <balbir@linux.vnet.ibm.com>
Subject: Re: [Xen-devel] Re: [RFC PATCH 0/4] (Take 2): transcendent memory ("tmem") for Linux
Date: Sun, 12 Jul 2009 23:43:30 +0300 [thread overview]
Message-ID: <4A5A4AF2.40609@redhat.com> (raw)
In-Reply-To: <e60ab548-f0be-4a75-a10b-1f2eb89247a7@default>
On 07/12/2009 11:39 PM, Dan Magenheimer wrote:
>> Right, the transient uses of tmem when applied to disk objects
>> (swap/pagecache) are very similar to disk caches. Which is
>> why you can
>> get a very similar effect when caching your virtual disks;
>> this can be
>> done without any guest modification.
>>
>
> Write-through backing and virtual disk cacheing offer a
> similar effect, but it is far from the same.
>
Can you explain how it differs for the swap case? Maybe I don't
understand how tmem preswap works.
--
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:[~2009-07-12 20:43 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-07 16:17 [RFC PATCH 0/4] (Take 2): transcendent memory ("tmem") for Linux Dan Magenheimer
2009-07-07 16:17 ` Dan Magenheimer
2009-07-07 17:28 ` Rik van Riel
2009-07-07 17:28 ` Rik van Riel
2009-07-07 19:53 ` Dan Magenheimer
2009-07-07 19:53 ` Dan Magenheimer
2009-07-08 22:56 ` Anthony Liguori
2009-07-08 22:56 ` Anthony Liguori
2009-07-08 23:31 ` [Xen-devel] " Dan Magenheimer
2009-07-08 23:31 ` Dan Magenheimer
2009-07-08 23:57 ` Anthony Liguori
2009-07-08 23:57 ` Anthony Liguori
2009-07-09 0:17 ` Jeremy Fitzhardinge
2009-07-09 0:17 ` Jeremy Fitzhardinge
2009-07-09 0:27 ` Anthony Liguori
2009-07-09 0:27 ` Anthony Liguori
2009-07-09 1:20 ` Rik van Riel
2009-07-09 1:20 ` Rik van Riel
2009-07-09 21:09 ` Dan Magenheimer
2009-07-09 21:09 ` Dan Magenheimer
2009-07-09 21:27 ` Rik van Riel
2009-07-09 21:27 ` Rik van Riel
2009-07-09 21:48 ` Dan Magenheimer
2009-07-09 21:48 ` Dan Magenheimer
2009-07-09 21:41 ` Anthony Liguori
2009-07-09 21:41 ` Anthony Liguori
2009-07-09 22:34 ` Dan Magenheimer
2009-07-09 22:34 ` Dan Magenheimer
2009-07-09 22:45 ` Rik van Riel
2009-07-09 22:45 ` Rik van Riel
2009-07-09 23:33 ` Anthony Liguori
2009-07-09 23:33 ` Anthony Liguori
2009-07-09 23:33 ` Anthony Liguori
2009-07-10 15:23 ` Dan Magenheimer
2009-07-10 15:23 ` Dan Magenheimer
2009-07-12 9:20 ` Avi Kivity
2009-07-12 9:20 ` Avi Kivity
2009-07-12 16:28 ` Dan Magenheimer
2009-07-12 16:28 ` Dan Magenheimer
2009-07-12 17:27 ` Avi Kivity
2009-07-12 17:27 ` Avi Kivity
2009-07-12 20:59 ` Dan Magenheimer
2009-07-12 20:59 ` Dan Magenheimer
2009-07-12 13:28 ` Anthony Liguori
2009-07-12 13:28 ` Anthony Liguori
2009-07-12 16:20 ` Dan Magenheimer
2009-07-12 16:20 ` Dan Magenheimer
2009-07-12 17:16 ` Avi Kivity
2009-07-12 17:16 ` Avi Kivity
2009-07-12 19:34 ` Anthony Liguori
2009-07-12 19:34 ` Anthony Liguori
2009-07-13 20:17 ` Chris Mason
2009-07-13 20:17 ` Chris Mason
2009-07-13 20:38 ` Anthony Liguori
2009-07-13 20:38 ` Anthony Liguori
2009-07-13 20:38 ` Anthony Liguori
2009-07-13 20:38 ` Anthony Liguori
2009-07-13 21:01 ` Chris Mason
2009-07-13 21:01 ` Chris Mason
2009-07-13 21:17 ` Anthony Liguori
2009-07-13 21:17 ` Anthony Liguori
2009-07-13 21:17 ` Anthony Liguori
2009-07-26 15:00 ` Avi Kivity
2009-07-26 15:00 ` Avi Kivity
2009-07-12 20:39 ` [Xen-devel] " Dan Magenheimer
2009-07-12 20:39 ` Dan Magenheimer
2009-07-12 20:43 ` Avi Kivity [this message]
2009-07-12 20:43 ` Avi Kivity
2009-07-12 21:08 ` Dan Magenheimer
2009-07-12 21:08 ` Dan Magenheimer
2009-07-13 11:33 ` Avi Kivity
2009-07-13 11:33 ` Avi Kivity
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