From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1DLP8I-0002cQ-Qo for user-mode-linux-devel@lists.sourceforge.net; Tue, 12 Apr 2005 10:25:02 -0700 Received: from smtp003.mail.ukl.yahoo.com ([217.12.11.34]) by sc8-sf-mx1.sourceforge.net with smtp (Exim 4.41) id 1DLP8F-00033H-LJ for user-mode-linux-devel@lists.sourceforge.net; Tue, 12 Apr 2005 10:25:02 -0700 From: Blaisorblade Subject: Re: [uml-devel] guest performance References: <000501c53f6d$3b936df0$0201a8c0@lualele> In-Reply-To: <000501c53f6d$3b936df0$0201a8c0@lualele> MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Content-Disposition: inline Message-Id: <200504121932.31338.blaisorblade@yahoo.it> Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Tue, 12 Apr 2005 19:32:31 +0200 Content-Transfer-Encoding: quoted-printable To: user-mode-linux-devel@lists.sourceforge.net Cc: itamar , uml-user On Tuesday 12 April 2005 16:37, itamar wrote: > How to make a guest machine running more fast ? > > > CONFIG_BLK_DEV_UBD_SYNC =3DY or CONFIG_BLK_DEV_UBD_SYNC=3DN The second is surely faster but less safe. > What=B4s the best for a uml provider ? For recent (IIRC >=3D 2.6.9, at least) the difference of performance is=20 acceptable; however, in case of a host crash (a guest crash shouldn't creat= e=20 a problem), with the second one you would get big problems on guest reboot = (especially if you use journaled filesystems, especially like reiserfs,=20 because they want to be able to force datas out on the disk). --=20 Paolo Giarrusso, aka Blaisorblade Linux registered user n. 292729 http://www.user-mode-linux.org/~blaisorblade ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95&alloc_id=14396&op=CCk _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel