From: "Mike D. Day" <ncmike@us.ibm.com>
To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: Jae-Wan Jang <jwjang@camars.kaist.ac.kr>, xen-devel@lists.xensource.com
Subject: Re: Page sharing in Xen?
Date: Wed, 12 Jul 2006 10:20:55 -0400 [thread overview]
Message-ID: <44B50547.9090909@us.ibm.com> (raw)
In-Reply-To: <d9c997cb3cd3e5454345e143fc780071@cl.cam.ac.uk>
Keir Fraser wrote:
>
> On 12 Jul 2006, at 03:38, Jae-Wan Jang wrote:
>
>> I want to know whether Xen shares pages between domains or not.
>> When I read "Memory Resource Management in VMware ESX server",
>> they use page sharing between domains with hash value of a page.
>> So I wonder that Xen uses this technique
>> or if not, is there anyone who is implementing this to Xen now or
>> willing to do so.
>
> There is explicit page sharing in Xen, but the kind of automatic scheme
> described in that paper. This is largely because it's unclear how great
> the benefit would be in practice.
Page coalescing is a frequently requested feature, not just for Xen/x86
but for other platforms/Hypervisors. It would be good if we can
incorporate it into Xen.
Mike
prev parent reply other threads:[~2006-07-12 14:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-12 2:38 Page sharing in Xen? Jae-Wan Jang
2006-07-12 8:34 ` Keir Fraser
2006-07-12 12:34 ` Arne Mejlholm
2006-07-12 14:20 ` Mike D. Day [this message]
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