Hi, I have a uml 2.6.12-bs1-skas0 hanging after Init on a smp ssi host. If I boot with ./linux init=/bin/sh then I get a shell but it can handle only internal commands (e.g. cd) and hangs at the first external command (ls,ps,...)
My configuration is a SMP xeon based server running 2.6.10-ssi-i386-smp from the open SSI project (http://openssi.org), distribution is Debian Sarge (installed when it was still testing) Concerning the UML I'm trying to compile I'm working with a 2.6.12 kernel patched with the patch-2.12.2 from kernel.org and the uml patch from BlaisorBlade 2.6.12-bb2-skas0 (I tried numerous variant before to settle on that one... more details available if needed) fetched at http://www.user-mode-linux.org/~blaisorblade/patches/guest/uml-2.6.12-bb 2-skas0/uml-2.6.12-bb2-skas0.patch.bz2 The root FS is the root_fs_toms1.7.205 downloaded from user-mode-linux.org but I also tested with a debian 3.0-r1 from the same site without more success (just in case...) Here are the approaches I tried so far and the details I can provide (let me know if you can think of something else): ________________________________________________________________________ __ [1] SNAPSHOT here is what happens at boot time: ~/uml/kernels$ ./linux Checking for /proc/mm...not found Checking for the skas3 patch in the host...not found Checking PROT_EXEC mmap in /tmp...OK Linux version 2.6.12.2-bb2-skas0 ([EMAIL PROTECTED]) (gcc version 3.3.5 (Debian 1:3.3.5-13)) #4 Mon Jul 11 14:54:19 EDT 2005 Built 1 zonelists Kernel command line: root=98:0 PID hash table entries: 256 (order: 8, 4096 bytes) Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) Memory: 29548k available Mount-cache hash table entries: 512 Checking for host processor cmov support...Yes Checking for host processor xmm support...No Checking that ptrace can change system call numbers...OK Checking syscall emulation patch for ptrace...missing Checking that host ptys support output SIGIO...No, enabling workaround Checking that host ptys support SIGIO on close...No, enabling workaround Checking for /dev/anon on the host...Not available (open failed with errno 2) NET: Registered protocol family 16 mconsole (version 2) initialized on /home/alessio/.uml/eTXJSG/mconsole ubd: Synchronous mode VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered NET: Registered protocol family 2 IP: routing cache hash table of 512 buckets, 4Kbytes TCP established hash table entries: 2048 (order: 2, 16384 bytes) TCP bind hash table entries: 2048 (order: 1, 8192 bytes) TCP: Hash tables configured (established 2048 bind 2048) NET: Registered protocol family 1 NET: Registered protocol family 17 Initialized stdio console driver Console initialized on /dev/tty0 Initializing software serial port version 1 ubda: unknown partition table VFS: Mounted root (ext2 filesystem) readonly. line_ioctl: tty0: ioctl KDSIGACCEPT called INIT: version 2.84 booting from then on a killall -9 linux is necessary to unstuck the situation. ________________________________________________________________________ ___ [2] APPLYING SKASx to the host kernel not feasible (at least for me), the open SSI modifications and the uml host SKASx patches collide, I'd prefer fix the problem in TT or SKAS0 mode rather than mixing the two patches... ________________________________________________________________________ ___ [3] Searching the mailing list... 1. This looks very similar to the following (old) post (not fully solved) http://sourceforge.net/mailarchive/message.php?msg_id=9165179 Contacted the author to check for any update, waiting on his response. 2. jeff's initial skas0 post suggested problems w/ SMP hosts http://sourceforge.net/mailarchive/forum.php?thread_id=7637144&forum_id= 3648 is this still true in 2.6.12-bs1-skas0? If yes, then I guess we don't need to look further... 3. I can't tell if the skas03 bug dating back to 2.6.9-v7 that BlaisorBlade pointed out in his recent post is also the one affecting skas0 ________________________________________________________________________ ___ [4] status of uml processes While trying to run ./linux, a ps -A u |grep username-running-uml reveals that there are indeed processes stuck alessio 115044 0.7 0.2 32788 4448 pts/16 S+ 17:14 0:00 ./linux alessio 115052 0.0 0.2 32788 4448 pts/16 S+ 17:14 0:00 ./linux alessio 115053 0.0 0.2 32788 4448 pts/16 S+ 17:14 0:00 ./linux alessio 115054 0.0 0.0 420 420 pts/16 T+ 17:14 0:00 alessio 115055 0.0 0.0 420 420 pts/16 T+ 17:14 0:00 ________________________________________________________________________ ___ [5] stracing execve("./linux", ["./linux"], [/* 18 vars */]) = 0 uname({sys="Linux", node="xxx", ...}) = 0 brk(0) = 0x8261000 brk(0x8282000) = 0x8282000 rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0 getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0 rt_sigaction(SIGINT, {0x8056bd0, [], SA_RESTORER|SA_NOMASK|SA_ONESHOT, 0x818cf48}, NULL, 8) = 0 rt_sigaction(SIGTERM, {0x8056bd0, [], SA_RESTORER|SA_NOMASK|SA_ONESHOT, 0x818cf48}, NULL, 8) = 0 rt_sigaction(SIGHUP, {0x8056bd0, [], SA_RESTORER|SA_NOMASK|SA_ONESHOT, 0x818cf48}, NULL, 8) = 0 fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 16), ...}) = 0 old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fff000 access("/proc/mm", W_OK) = -1 ENOENT (No such file or directory) write(1, "Checking for /proc/mm...not foun"..., 34) = 34 old_mmap(NULL, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ffe000 clone(child_stack=0xb7ffefd8, flags=0|SIGCHLD) = 116524 --- SIGCHLD (Child exited) @ 0 (0) --- waitpid(116524, [{WIFSTOPPED(s) && WSTOPSIG(s) == SIGSTOP}], WUNTRACED) = 116524 ptrace(0x34 /* PTRACE_??? */, 116524, 0, 0xbfffe270) = -1 EIO (Input/output error) write(1, "Checking for the skas3 patch in "..., 53) = 53 ptrace(PTRACE_GETREGS, 116524, 0, 0x8252ac0) = 0 ptrace(PTRACE_GETFPXREGS, 116524, 0, 0x8252ba0) = 0 ptrace(PTRACE_CONT, 116524, 0, SIG_0) = 0 waitpid(116524, [{WIFEXITED(s) && WEXITSTATUS(s) == 1}], 0) = 116524 --- SIGCHLD (Child exited) @ 0 (0) --- munmap(0xb7ffe000, 4096) = 0 gettimeofday({1121117270, 331958}, NULL) = 0 getpid() = 116523 open("/tmp/vm_file-r6C26y", O_RDWR|O_CREAT|O_EXCL, 0600) = 3 unlink("/tmp/vm_file-r6C26y") = 0 fchmod(3, 0777) = 0 _llseek(3, 4096, [4096], SEEK_SET) = 0 write(3, "\0", 1) = 1 old_mmap(NULL, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xb7ffe000 write(1, "Checking PROT_EXEC mmap in /tmp."..., 34) = 34 write(1, "OK\n", 3) = 3 munmap(0xb7ffe000, 4096) = 0 close(3) = 0 uname({sys="Linux", node="xxx", ...}) = 0 gettimeofday({1121117270, 333276}, NULL) = 0 getpid() = 116523 open("/tmp/vm_file-erqd9X", O_RDWR|O_CREAT|O_EXCL, 0600) = 3 unlink("/tmp/vm_file-erqd9X") = 0 fchmod(3, 0777) = 0 _llseek(3, 33554432, [33554432], SEEK_SET) = 0 write(3, "\0", 1) = 1 fcntl64(3, F_SETFD, FD_CLOEXEC) = 0 mmap2(0x8800000, 25165824, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, 3, 0x800) = 0x8800000 _llseek(3, 1912832, [1912832], SEEK_SET) = 0 write(3, "U\211\345\203\354\f\211\34$\211t$\4\211|$\10\271\374\367"..., 4096) = 4096 mkdir("/home/alessio/.uml/", 0777) = -1 EEXIST (File exists) gettimeofday({1121117270, 335289}, NULL) = 0 getpid() = 116523 open("/home/alessio/.uml/1npSkn", O_RDWR|O_CREAT|O_EXCL, 0600) = 4 close(4) = 0 unlink("/home/alessio/.uml/1npSkn") = 0 mkdir("/home/alessio/.uml/1npSkn", 0777) = 0 open("/home/alessio/.uml/1npSkn/pid", O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0644) = 4 getpid() = 116523 write(4, "116523\n", 7) = 7 close(4) = 0 mprotect(0x821a000, 8192, PROT_READ|PROT_WRITE|PROT_EXEC) = 0 rt_sigaction(SIGSEGV, {0x806d9b0, [USR1 ALRM VTALRM WINCH IO], SA_RESTORER|SA_STACK, 0x818cf48}, NULL, 8) = 0 rt_sigaction(SIGTRAP, {0x806d9b0, [USR1 ALRM VTALRM WINCH IO], SA_RESTORER|SA_STACK, 0x818cf48}, NULL, 8) = 0 rt_sigaction(SIGFPE, {0x806d9b0, [USR1 ALRM VTALRM WINCH IO], SA_RESTORER|SA_STACK, 0x818cf48}, NULL, 8) = 0 rt_sigaction(SIGILL, {0x806d9b0, [USR1 ALRM VTALRM WINCH IO], SA_RESTORER|SA_STACK, 0x818cf48}, NULL, 8) = 0 rt_sigaction(SIGBUS, {0x806d9b0, [USR1 ALRM VTALRM WINCH IO], SA_RESTORER|SA_STACK, 0x818cf48}, NULL, 8) = 0 rt_sigaction(SIGUSR2, {0x806d9b0, [USR1 ALRM VTALRM WINCH IO], SA_RESTORER|SA_STACK, 0x818cf48}, NULL, 8) = 0 rt_sigaction(SIGHUP, {SIG_IGN}, {0x8056bd0, [], SA_RESTORER|SA_NOMASK|SA_ONESHOT, 0x818cf48}, 8) = 0 rt_sigaction(SIGVTALRM, {0x805bdb0, [USR1 ALRM WINCH IO], SA_RESTORER|SA_STACK|SA_RESTART, 0x818cf48}, NULL, 8) = 0 rt_sigaction(SIGIO, {0x806d9b0, [USR1 ALRM VTALRM WINCH IO], SA_RESTORER|SA_STACK|SA_RESTART, 0x818cf48}, NULL, 8) = 0 rt_sigaction(SIGWINCH, {SIG_IGN}, {SIG_DFL}, 8) = 0 rt_sigaction(SIGWINCH, {0x806d9b0, [USR1 ALRM VTALRM IO], SA_RESTORER|SA_STACK|SA_RESTART, 0x818cf48}, NULL, 8) = 0 rt_sigprocmask(SIG_BLOCK, NULL, [IO], 8) = 0 sigaltstack({ss_sp=0x8218000, ss_flags=0, ss_size=16380}, NULL) = 0 rt_sigaction(SIGUSR1, {0x805f770, [], SA_RESTORER|SA_STACK, 0x818cf48}, NULL, 8) = 0 getpid() = 116523 kill(116523, SIGUSR1) = 0 --- SIGUSR1 (User defined signal 1) @ 0 (0) --- rt_sigprocmask(SIG_UNBLOCK, [USR1], [USR1 IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, NULL, [IO], 8) = 0 rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0 sigaltstack({ss_sp=0, ss_flags=SS_DISABLE, ss_size=0}, NULL) = 0 rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0 rt_sigprocmask(SIG_BLOCK, NULL, [IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 getpid() = 116523 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 uname({sys="Linux", node="xxx", ...}) = 0 rt_sigprocmask(SIG_SETMASK, NULL, [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM IO], 8) = 0 rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0 ... and so on so forth... ________________________________________________________________________ ___ [6] gdb-ing Not enough experience in kernel development to extract meaningful data from my little step-walk in the booting kernel... If anyone is interested in the faulty binary I'll post it somewhere Thanks for your time! Alessio Gaspar ------------------------------------------------------- This SF.Net email is sponsored by the 'Do More With Dual!' webinar happening July 14 at 8am PDT/11am EDT. We invite you to explore the latest in dual core and dual graphics technology at this free one hour event hosted by HP, AMD, and NVIDIA. To register visit http://www.hp.com/go/dualwebinar _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
