After building usermode-sources 2.4.26-r6 with gcc 3.4.2-r2 and then running the usermode linux, it cannot find its root virtual device. After switching to gcc 3.3.4 and rebuilding the UML, it runs fine. Nothing else has been changed. Reproducible: Always Steps to Reproduce: 1.emerge =usermode-sources-2.4.26-r6; cd /usr/src/uml/linux 2.make menuconfig ARCH=um; make linux ARCH=um; cp linux /usr/local/bin 3.linux ubd0=root_fs ubd1=swap_fs eth0=tuntap,,,192.168.0.254 Actual Results: # linux2.4-BAD ubd0=root_fs ubd1=swap_fs eth0=tuntap,,,192.168.0.254 Checking for the skas3 patch in the host...found Checking for /proc/mm...found Checking for /dev/anon on the host...Not available (open failed with errno 2) Linux version 2.4.26-uml1-r6-1um (root@agur) (gcc version 3.4.2 (Gentoo Linux 3. 4.2-r2, ssp-3.4.1-1, pie-8.7.6.5)) #2 Wed Oct 27 02:48:45 CEST 2004 On node 0 totalpages: 8192 zone(0): 8192 pages. zone(1): 0 pages. zone(2): 0 pages. Kernel command line: ubd0=root_fs ubd1=swap_fs eth0=tuntap,,,192.168.0.254 root=/dev/ubd0 Calibrating delay loop... 2169.24 BogoMIPS Memory: 29696k available Dentry cache hash table entries: 4096 (order: 3, 32768 bytes) Inode cache hash table entries: 2048 (order: 2, 16384 bytes) Mount cache hash table entries: 512 (order: 0, 4096 bytes) Buffer cache hash table entries: 1024 (order: 0, 4096 bytes) Page-cache hash table entries: 8192 (order: 3, 32768 bytes) Checking for host processor cmov support...Yes Checking for host processor xmm support...No Checking that ptrace can change system call numbers...OK Checking that host ptys support output SIGIO...Yes Checking that host ptys support SIGIO on close...No, enabling workaround POSIX conformance testing by UNIFIX Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Initializing RT netlink socket Starting kswapd Journalled Block Device driver loaded devfs: v1.12c (20020818) Richard Gooch (rgooch@atnf.csiro.au) devfs: boot_options: 0x0 SGI XFS with no debug enabled pty: 256 Unix98 ptys configured SLIP: version 0.8.4-NET3.019-NEWTTY (dynamic channels, max=256). RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize PPP generic driver version 2.4.2 Universal TUN/TAP device driver 1.5 (C)1999-2002 Maxim Krasnyansky Netdevice 0 : TUN/TAP backend - IP = 192.168.0.254 NET4: Linux TCP/IP 1.0 for NET4.0 IP Protocols: ICMP, UDP, TCP, IGMP IP: routing cache hash table of 512 buckets, 4Kbytes TCP: Hash tables configured (established 2048 bind 4096) NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. VFS: Cannot open root device "ubd0" or 62:00 Please append a correct "root=" boot option Kernel panic: VFS: Unable to mount root fs on 62:00 <6>SysRq : Show Regs EIP: 0073:[<40044491>] CPU: 0 Not tainted ESP: 007b:40130fb0 EFLAGS: 00000246 Not tainted EAX: 00000000 EBX: 00005d2e ECX: 00000013 EDX: 00005d2e ESI: 00000000 EDI: 00000000 EBP: 40130fbc DS: 007b ES: 007b Call Trace: [<a001d8a5>] [<a0011afc>] [<a0001994>] [<a000e5fe>] [<a0020802>] [<a0058242>] [<a0159459>] [<a000d580>] [<a0125e10>] [<a000d5c7>] [<a000d580>] [<a011f4a9>] [<a000d580>] [<a0125e10>] [<a011f495>] [<a000d580>] [<a0125e10>] [<a0125eb0>] [<a000d580>] [<a0125e10>] [<a0125f1d>] # Expected Results: Find the /dev/ubd/0 and /dev/ubd/1 devices and complete a "virtual boot" up to a login prompt. # emerge info Portage 2.0.51-r2 (default-x86-2004.2, gcc-3.4.2, glibc-2.3.4.20040808-r1, 2.6.7 i686) ================================================================= System uname: 2.6.7 i686 AMD Athlon(tm) 64 Processor 3000+ Gentoo Base System version 1.4.16 Autoconf: sys-devel/autoconf-2.59-r5 Automake: sys-devel/automake-1.8.5-r1 Binutils: sys-devel/binutils-2.14.90.0.8-r1 Headers: sys-kernel/linux-headers-2.4.21-r1 Libtools: sys-devel/libtool-1.5.2-r5 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CFLAGS="-O3 -march=athlon64 -fomit-frame-pointer -pipe" CHOST="i686-pc-linux-gnu" COMPILER="" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O3 -march=athlon64 -fomit-frame-pointer -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs ccache distlocks sandbox" GENTOO_MIRRORS="http://linux.rz.ruhr-uni-bochum.de/download/gentoo-mirror/ ftp: //gentoo.inode.at/source/ http://gentoo.inode.at/ ftp://linux.rz. ruhr-uni-bochum.de/gentoo-mirror/" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="X509 acpi apm berkdb bitmap-fonts chroot crypt devmap encode gdbm gif innodb mysql ncurses nls pam pcntl pcre pdflib perl python readline shared sharedmem slang sockets sse ssl svga tcpd truetype uml x86 xml2 zlib"
I actually got the same errors 'when I compile any 2.6.12 with gcc-4.* (for instance on modules vesafb-ng)... r0g1
Do you still have problems with usermode-sources if you use gcc-3.4.4-r1? The gcc-4 issue would be a seperate bug, please open one if it is still an issue.
