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 1DIthH-00085W-IP for user-mode-linux-devel@lists.sourceforge.net; Tue, 05 Apr 2005 12:26:47 -0700 Received: from dsl092-053-140.phl1.dsl.speakeasy.net ([66.92.53.140] helo=grelber.thyrsus.com) by sc8-sf-mx1.sourceforge.net with esmtp (TLSv1:AES256-SHA:256) (Exim 4.41) id 1DIthF-0000BC-W7 for user-mode-linux-devel@lists.sourceforge.net; Tue, 05 Apr 2005 12:26:47 -0700 From: Rob Landley Subject: Re: [uml-devel] 2.6.9-bs7 panic on check_sysemu References: <4250729B.7040407@rimuhosting.com> <200504041532.23866.blaisorblade@yahoo.it> In-Reply-To: <200504041532.23866.blaisorblade@yahoo.it> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200504051323.47160.rob@landley.net> 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, 5 Apr 2005 13:23:47 -0400 To: user-mode-linux-devel@lists.sourceforge.net Cc: Blaisorblade , Peter On Monday 04 April 2005 09:32 am, Blaisorblade wrote: > > Is this a case where I should be upgrading my host kernels (will do that > > in time anyway)? > > You simply need to update the SKAS patch version. -V2 is very old, and many > bugs (including this, that is a bug in the SYSEMU part of the SKAS patch). > Upgrading to -V7 for the SKAS patch, even on the same host kernel version > (i.e. against 2.6.8.1), would fix that. > > Also, some older guest kernels may seem to work, because they don't > diagnose such bugs. But actually they have problems in some situations, > because of the host bugs. For instance panicking with a simple "echo 0 > > /proc/sysemu; echo 1 > /proc/sysemu". > > > Or is there something that can be done on the guest to make it work on > > older kernels also? > > Not a lot, except disabling SYSEMU (and its performance advantage) entirely > - add the "nosysemu" param to the UML command line and it will work. > > But it won't be as slow as if you didn't use SKAS. > > Bye Speaking of which, I ask this from time to time: What's the minimal patch set that _just_ adds -SKAS0 mode to something like a 2.6.11 kernel? I'd like to try it out, but every time I sit down to whack at it my interest budget runs out sifting through a mountain of unrelated x86-64 patches to try to figure out what exactly I need to apply to get just SKAS0... No biggie. I'll can always ask again later... :) Rob ------------------------------------------------------- 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_id=6595&alloc_id=14396&op=click _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel