I have seen this a couple of times as well. I am a bit snowed under at the moment, when I have some spare time I will try to dig through my trees to see exactly what did I come up with as a root cause.
A. On 19/11/14 17:06, Toralf Förster wrote: > /me wonders, why the same call few seconds later works (current git kernel), > but not for the first time : > > $ nice start_uml.sh -r trinity > + /usr/local/bin/linux-v3.18-rc4 earlyprintk > ubda=/home/tfoerste/virtual/uml/trinity ubdb=/mnt/ramdisk/trinity_swap > eth0=tuntap,tap0,72:ef:3d:9f:c3:5a mem=2000M con0=fd:0,fd:1 con=pts > umid=uml_trinity rootfstype=ext4 softlockup_all_cpu_backtrace=1 > > Locating the bottom of the address space ... 0x1000 > Locating the top of the address space ... 0xc0000000 > Core dump limits : > soft - 0 > hard - NONE > Checking that ptrace can change system call numbers...OK > Checking syscall emulation patch for ptrace...OK > Checking advanced syscall emulation patch for ptrace...OK > Checking environment variables for a tempdir...none found > Checking if /dev/shm is on tmpfs...OK > Checking PROT_EXEC mmap in /dev/shm...OK > Checking for the skas3 patch in the host: > - /proc/mm...not found: No such file or directory > - PTRACE_FAULTINFO...not found > - PTRACE_LDT...not found > UML running in SKAS0 mode > Adding 28835840 bytes to physical memory to account for exec-shield gap > Kernel virtual memory size shrunk to 953155584 bytes > bootconsole [earlycon0] enabled > PID hash table entries: 4096 (order: 2, 16384 bytes) > Dentry cache hash table entries: 262144 (order: 8, 1048576 bytes) > Inode-cache hash table entries: 131072 (order: 7, 524288 bytes) > Memory: 2022804K/2076160K available (4848K kernel code, 310K rwdata, 1784K > rodata, 118K init, 240K bss, 53356K reserved) > SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 > NR_IRQS:15 > Calibrating delay loop... 2072.57 BogoMIPS (lpj=10362880) > pid_max: default: 32768 minimum: 301 > Mount-cache hash table entries: 4096 (order: 2, 16384 bytes) > Mountpoint-cache hash table entries: 4096 (order: 2, 16384 bytes) > Checking for host processor cmov support...Yes > Checking that host ptys support output SIGIO...tty_output : read failed, err > = -1 > Checking that host ptys support SIGIO on close...No, enabling workaround > devtmpfs: initialized > Using 2.6 host AIO > xor: measuring software checksum speed > 8regs : 2519.200 MB/sec > 8regs_prefetch: 2843.600 MB/sec > 32regs : 1999.200 MB/sec > 32regs_prefetch: 1238.400 MB/sec > xor: using function: 8regs_prefetch (2843.600 MB/sec) > prandom: seed boundary self test passed > prandom: 100 self tests passed > NET: Registered protocol family 16 > raid6: int32x1 235 MB/s > raid6: int32x2 292 MB/s > raid6: int32x4 188 MB/s > raid6: int32x8 183 MB/s > raid6: using algorithm int32x2 (292 MB/s) > raid6: using intx1 recovery algorithm > Switched to clocksource itimer > NET: Registered protocol family 2 > TCP established hash table entries: 16384 (order: 4, 65536 bytes) > TCP bind hash table entries: 16384 (order: 6, 327680 bytes) > TCP: Hash tables configured (established 16384 bind 16384) > TCP: reno registered > UDP hash table entries: 1024 (order: 3, 49152 bytes) > UDP-Lite hash table entries: 1024 (order: 3, 49152 bytes) > NET: Registered protocol family 1 > RPC: Registered named UNIX socket transport module. > RPC: Registered udp transport module. > RPC: Registered tcp transport module. > RPC: Registered tcp NFSv4.1 backchannel transport module. > console [stderr0] disabled > mconsole (version 2) initialized on /home/tfoerste/.uml/uml_trinity/mconsole > Checking host MADV_REMOVE support...OK > UML Audio Relay (host dsp = /dev/sound/dsp, host mixer = /dev/sound/mixer) > Host TLS support detected > Detected host type: i386 (GDT indexes 6 to 9) > futex hash table entries: 256 (order: 0, 7168 bytes) > audit: initializing netlink subsys (disabled) > audit: type=2000 audit(1416416597.671:1): initialized > zpool: loaded > zbud: loaded > NFS: Registering the id_resolver key type > Key type id_resolver registered > Key type id_legacy registered > nfs4filelayout_init: NFSv4 File Layout Driver Registering... > Installing knfsd (copyright (C) 1996 o...@monad.swb.de). > msgmni has been set to 3950 > alg: No test for stdrng (krng) > Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254) > io scheduler noop registered (default) > loop: module loaded > device-mapper: uevent: version 1.0.3 > device-mapper: ioctl: 4.28.0-ioctl (2014-09-17) initialised: > dm-de...@redhat.com > TCP: cubic registered > NET: Registered protocol family 10 > sit: IPv6 over IPv4 tunneling driver > NET: Registered protocol family 17 > > Key type dns_resolver registered > Initialized stdio console driver > Console initialized on /dev/tty0 > console [tty0] enabled > console [tty0] enabled > bootconsole [earlycon0] disabled > bootconsole [earlycon0] disabled > Initializing software serial port version 1 > console [mc-1] enabled > Failed to initialize ubd device 0 :Couldn't determine size of device's file > ubdb: unknown partition table > Netdevice 0 (72:ef:3d:9f:c3:5a) : > TUN/TAP backend - > Btrfs loaded > winch_thread : TIOCSCTTY failed on fd 1 err = 1 > VFS: Cannot open root device "98:0" or unknown-block(98,0): error -6 > Please append a correct "root=" boot option; here are the available > partitions: > 6210 262144 ubdb driver: uml-blkdev > Kernel panic - not syncing: VFS: Unable to mount root fs on > unknown-block(98,0) > CPU: 0 PID: 1 Comm: swapper Not tainted 3.18.0-rc4 #12 > Stack: > 085c8b17 085c8b17 086f8547 085068c1 fffffffa 864aff40 864afef8 08509f65 > 00000000 864afed0 864aff20 085060bd 085d4920 08739180 085c5be0 864aff30 > 00000000 fffffffa 864aff40 00008001 864aff6c 08048f9d 085c5be0 864aff40 > Call Trace: > [<085068c1>] ? printk+0x38/0x3a > [<08060ae9>] show_stack+0x119/0x180 > [<085068c1>] ? printk+0x38/0x3a > [<08509f65>] dump_stack+0x26/0x28 > [<085060bd>] panic+0x8f/0x1a9 > [<08048f9d>] mount_block_root+0x1e0/0x261 > [<0811bea8>] ? SyS_mknod+0x28/0x30 > [<0804907e>] mount_root+0x60/0x66 > [<080491c3>] prepare_namespace+0x13f/0x185 > [<08048cb2>] kernel_init_freeable+0x190/0x19d > [<0804821f>] ? repair_env_string+0x0/0x91 > [<0850493b>] kernel_init+0xb/0xe0 > [<0805f69b>] new_thread_handler+0x6b/0x90 > > > ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
