From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: Andrew Morton <akpm@osdl.org>
Cc: nickpiggin@yahoo.com.au, linux-mm@kvack.org,
frankeh@watson.ibm.com, rhim@cc.gatech.edu
Subject: Re: Page host virtual assist patches.
Date: Tue, 25 Apr 2006 12:44:27 +0200 [thread overview]
Message-ID: <1145961867.5282.46.camel@localhost> (raw)
In-Reply-To: <20060425013712.365892c2.akpm@osdl.org>
On Tue, 2006-04-25 at 01:37 -0700, Andrew Morton wrote:
> > The point here is WHO does the reclaim. Sure we can do the reclaim in
> > the guest but it is the host that has the memory pressure. To call into
> > the guest is not a good idea, if you have an idle guest you generally
> > increase the memory pressure because some of the guests pages might have
> > been swapped which are needed if the guest has to do the reclaim.
>
> Cannot the guests employ text sharing?
Yes we can. We even had some patches for sharing the kernel text between
virtual machines. But the kernel text is only a small part of the memory
that gets accessed for a vmscan operation.
--
blue skies,
Martin.
Martin Schwidefsky
Linux for zSeries Development & Services
IBM Deutschland Entwicklung GmbH
"Reality continues to ruin my life." - Calvin.
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next prev parent reply other threads:[~2006-04-25 10:45 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-24 12:34 Page host virtual assist patches Martin Schwidefsky
2006-04-25 1:01 ` Andrew Morton
2006-04-25 7:19 ` Nick Piggin
2006-04-25 8:31 ` Martin Schwidefsky
2006-04-25 8:37 ` Andrew Morton
2006-04-25 10:44 ` Martin Schwidefsky [this message]
2006-04-25 16:29 ` Andrew Morton
2006-04-25 17:04 ` Martin Schwidefsky
2006-04-25 10:04 ` Nick Piggin
2006-04-25 11:28 ` Martin Schwidefsky
2006-04-25 12:13 ` Nick Piggin
2006-04-25 14:15 ` Martin Schwidefsky
2006-04-26 1:13 ` Nick Piggin
2006-04-26 7:39 ` Martin Schwidefsky
2006-04-26 12:03 ` Hubertus Franke
2006-04-27 20:55 ` jschopp
2006-04-25 8:10 ` Martin Schwidefsky
2006-04-25 8:26 ` Nick Piggin
2006-04-25 10:36 ` Martin Schwidefsky
2006-04-25 10:51 ` Nick Piggin
2006-04-25 12:18 ` Martin Schwidefsky
2006-04-25 8:30 ` Andrew Morton
2006-04-25 10:43 ` Martin Schwidefsky
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