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 1H8cNB-0002jg-NW for user-mode-linux-devel@lists.sourceforge.net; Sun, 21 Jan 2007 05:04:37 -0800 Received: from mail.nagafix.co.uk ([194.145.196.85]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1H8cNB-0000cH-1r for user-mode-linux-devel@lists.sourceforge.net; Sun, 21 Jan 2007 05:04:37 -0800 Message-ID: <45B364DC.8040405@nagafix.co.uk> Date: Sun, 21 Jan 2007 13:04:28 +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> <45B12269.8040203@nagafix.co.uk> <45B32F92.80409@panasas.com> In-Reply-To: <45B32F92.80409@panasas.com> 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: Boaz Harrosh Cc: user-mode-linux-devel@lists.sourceforge.net >> 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. > I have a 2.6.19, vanila kernel on top of redhat4, host. There is one major difference in this case, redhat4 uses glibc 2.3 whereas fc6 (and gentoo-current) use glibc 2.4 A lot of the problems that I am reporting started when glibc was upgraded (sorry I forgot to mention that) > And any kernel between 2.6.17 - 2.6.20-rc5 x86_64 for guests. > For my iSCSI tests they all run well. > At the very beginning, I had bad crashes and I solved it with plain gdb. > The point for us to use UML, from the begging, was to use gdb on our own kernel development. > At the end it was very easy to find that I have miss-configured the uml kernel, when that was fixed every thing > ran well. > > for me I just do > #gdb um/vmlinux (was compiled with -O um) > gdb>run ubd0=/var/opt/FedoraCore5-AMD64-root_fs eth0=tuntap,,,192.168.0.117 > after first trap in gdb > gdb>handle SIGUSR1 pass nostop noprint > from than on its strait gdb, tell me if you need a script for loading symbols of kernel modules. That would be great, it could go on the wiki too. Thanks 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