From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1H7zqk-0001gW-Nn for user-mode-linux-devel@lists.sourceforge.net; Fri, 19 Jan 2007 11:56:34 -0800 Received: from mail.nagafix.co.uk ([194.145.196.85]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1H7zqj-0000TP-7R for user-mode-linux-devel@lists.sourceforge.net; Fri, 19 Jan 2007 11:56:34 -0800 Message-ID: <45B12269.8040203@nagafix.co.uk> Date: Fri, 19 Jan 2007 19:56:25 +0000 From: Antoine Martin MIME-Version: 1.0 References: <200701171715.35504.blaisorblade@yahoo.it> <45AE684D.7070802@theshore.net> <45AE67C0.5080003@nagafix.co.uk> <45AE7DFC.9050704@nagafix.co.uk> <45B0A4B7.7050702@nagafix.co.uk> <1169222858.11134.52.camel@athena.fprintf.net> <45B0EE71.5040908@nagafix.co.uk> <1169224702.11134.71.camel@athena.fprintf.net> <45B0F512.6020308@nagafix.co.uk> <45B10106.6060107@nagafix.co.uk> In-Reply-To: <45B10106.6060107@nagafix.co.uk> Subject: Re: [uml-devel] buggy UML AMD64? List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: user-mode-linux-devel-bounces@lists.sourceforge.net Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: Antoine Martin Cc: user-mode-linux-devel@lists.sourceforge.net Antoine Martin wrote: >>>> I have downgraded the x86 boxes to 2.6.15.7 and these are up and >>>> running again. But I can't do that for all of them, and this is just >>>> not an option for some of the amd64 boxes. >>> >>> My setup is: >> Thanks for that. That is very similar to mine. >> I don't think this has anything to do with the guest... So I'll try to >> remove the skas3 patch from the host and see how it goes. >> > I did, and no improvement... x86 guests still hang. > Could you post a binary guest kernel somewhere so I can try that? > (even if it isn't static - glibc should be similar since we're using > Gentoo amd64) > If that still does not work then I can be certain that it is something > to do with the host. I've just tried on 3 more hosts, all AMD64 Gentoo fully up to date, kernel 2.6.19.2. No skas, no exec shield, no selinux, plain kernel.org: None of them work with any of the 32-bit kernels! It prints nothing, just sits there spinning at 100% cpu. So I am now totally convinced that i haven't got a weird setup. Something else is broken in UML. On fully up to date Fedora Core 6 x86_64, the kernel does display something before crashing: # uname -a Linux localhost.localdomain 2.6.18-1.2869.fc6 #1 SMP Wed Dec 20 14:51:34 EST 2006 x86_64 x86_64 x86_64 GNU/Linux # ./kernel32-2.6.19.2 Checking that ptrace can change system call numbers...OK Checking syscall emulation patch for ptrace...missing Checking for tmpfs mount on /dev/shm...OK Checking PROT_EXEC mmap in /dev/shm/...OK Checking for the skas3 patch in the host: - /proc/mm...not found - PTRACE_FAULTINFO...not found - PTRACE_LDT...not found UML running in SKAS0 mode [root@localhost home]# This is 100% repeatable. Plain Fedora. Many users will have a similar setup and will just give up on UML. So I as I said before, UML is currently unusable for most people out there running fairly recent systems. Antoine ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel