WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

[Xen-users] Re: Default disk I/O scheduler in linux guest

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Re: Default disk I/O scheduler in linux guest
From: Jia Rao <rickenrao@xxxxxxxxx>
Date: Thu, 5 Feb 2009 09:42:01 -0500
Delivery-date: Thu, 05 Feb 2009 06:42:45 -0800
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=HIxok7Qg+3cWOG26LCYE2Ca7zB5DNMctTZc1XCVOEwI=; b=LWigWZrt2ipOpG/b8jscqSoyMvb6DzSYGw/WN9UL9v9cdGVFE4GGlz3g78Ycb9TBIw NbpDBuBVgsnAlfJKHugyUJfchtUw+qYAE6w+Z+YT6HK+R9b5a9Z6tIOtzZB2MQqxtuCJ J3RFsS5zKu+9yO9wF4DHtchPgKza4QzLk8xVg=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=etHrlFMkqKzbfgExWnqMnPyDsQn9gq5LnKRsYoanovCbXmFLsaFsoV6xTaW8FOp9nC dTeKxk/glUDKVLTMbYxLYYXotGop8cEcdZVn0QcLYgXDj0dDV8sp7XVNzG4SbO6vRsEd n2farUORf0eVYnNGpYvxQZnZlfp9QfekQE/Z0=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <994429490902041424r53669032p3f146f0356143bc2@xxxxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <994429490902041424r53669032p3f146f0356143bc2@xxxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Any ideas?

On Wed, Feb 4, 2009 at 5:24 PM, Jia Rao <rickenrao@xxxxxxxxx> wrote:
Hi, all,

I just found out that xen assigns the NOOP disk scheduler for linux guest OSes. Dom0 uses cfq scheduler (it is the linux default).
Is there a reason for xen to turn off disk request merging in the quest OS by selecting a NOOP scheduler?
Is it because the request optimization will be performed in dom0 or VMM ?

Thansk in advance,
Jia. 

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
<Prev in Thread] Current Thread [Next in Thread>