From: Rik van Riel <riel@redhat.com>
To: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: linux-kernel@vger.kernel.org, npiggin@suse.de, akpm@osdl.org,
jeremy@goop.org, xen-devel@lists.xensource.com,
tmem-devel@oss.oracle.com, alan@lxorguk.ukuu.org.uk,
linux-mm@kvack.org, kurt.hackel@oracle.com,
Rusty Russell <rusty@rustcorp.com.au>,
dave.mccracken@oracle.com, Marcelo Tosatti <mtosatti@redhat.com>,
sunil.mushran@oracle.com, Avi Kivity <avi@redhat.com>,
Schwidefsky <schwidefsky@de.ibm.com>,
chris.mason@oracle.com, Balbir Singh <balbir@linux.vnet.ibm.com>
Subject: Re: [RFC PATCH 0/4] (Take 2): transcendent memory ("tmem") for Linux
Date: Tue, 07 Jul 2009 13:28:13 -0400 [thread overview]
Message-ID: <4A5385AD.9000800@redhat.com> (raw)
In-Reply-To: <482d25af-01eb-4c2a-9b1d-bdaf4020ce88@default>
Dan Magenheimer wrote:
> "Preswap" IS persistent, but for various reasons may not always be
> available for use, again due to factors that may not be visible to the
> kernel (but, briefly, if the kernel is being "good" and has shared its
> resources nicely, then it will be able to use preswap, else it will not).
> Once a page is put, a get on the page will always succeed.
What happens when all of the free memory on a system
has been consumed by preswap by a few guests?
Will the system be unable to start another guest,
or is there some way to free the preswap memory?
WARNING: multiple messages have this Message-ID (diff)
From: Rik van Riel <riel@redhat.com>
To: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: linux-kernel@vger.kernel.org, npiggin@suse.de, akpm@osdl.org,
jeremy@goop.org, xen-devel@lists.xensource.com,
tmem-devel@oss.oracle.com, alan@lxorguk.ukuu.org.uk,
linux-mm@kvack.org, kurt.hackel@oracle.com,
Rusty Russell <rusty@rustcorp.com.au>,
dave.mccracken@oracle.com, Marcelo Tosatti <mtosatti@redhat.com>,
sunil.mushran@oracle.com, Avi Kivity <avi@redhat.com>,
Schwidefsky <schwidefsky@de.ibm.com>,
chris.mason@oracle.com, Balbir Singh <balbir@linux.vnet.ibm.com>
Subject: Re: [RFC PATCH 0/4] (Take 2): transcendent memory ("tmem") for Linux
Date: Tue, 07 Jul 2009 13:28:13 -0400 [thread overview]
Message-ID: <4A5385AD.9000800@redhat.com> (raw)
In-Reply-To: <482d25af-01eb-4c2a-9b1d-bdaf4020ce88@default>
Dan Magenheimer wrote:
> "Preswap" IS persistent, but for various reasons may not always be
> available for use, again due to factors that may not be visible to the
> kernel (but, briefly, if the kernel is being "good" and has shared its
> resources nicely, then it will be able to use preswap, else it will not).
> Once a page is put, a get on the page will always succeed.
What happens when all of the free memory on a system
has been consumed by preswap by a few guests?
Will the system be unable to start another guest,
or is there some way to free the preswap memory?
--
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next prev parent reply other threads:[~2009-07-07 17:28 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 [this message]
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
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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