Debug level "fixes" crash?

From: Bill (jobhunts02_at_aol.com)
Date: 05/07/05

  • Next message: Robert Redelmeier: "Re: Debug level "fixes" crash?" 
    Date: 7 May 2005 09:06:21 -0700

    While booting, I was constantly crashing when attempting to mount the
    JFFS2 filesystem (see below). So, I changed the JFFS2 debugging
    verbosity from 0 to 2. After doing this, I have not crashed again in
    numerous tests.

    Anyone else seen this kind of behavior and have an explanation?

    Thank you.

    U-Boot 1.1.1 (Apr 28 2005 - 17:13:43)

    MPC8260 Reset Status: Check Stop, External Soft, External Hard

    MPC8260 Clock Configuration
     - Bus-to-Core Mult 4x, VCO Div 2, 60x Bus Freq 25-75 , Core Freq
    100-300
     - dfbrg 1, corecnf 0x0a, busdf 3, cpmdf 1, plldf 0, pllmf 3
     - vco_out 264000000, scc_clk 66000000, brg_clk 16500000
     - cpu_clk 264000000, cpm_clk 132000000, bus_clk 66000000
     - pci_clk 33000000

    CPU: MPC8260 (HiP7 Rev 13, Mask 0.1 1K49M) at 264 MHz
    Motorola MPC8275
    DRAM: 32 MB
    FLASH: 8 MB
    In: serial
    Out: serial
    Err: serial
    Net: FCC2 ETHERNET
    Hit any key to stop autoboot: 0
    ### JFFS2 loading '/boot/vmlinux.pkg' to 0x100000
    Scanning JFFS2 FS: .................................... done.
    ### JFFS2 load complete: 811224 bytes loaded to 0x100000
    ## Booting image at 00100000 ...
       Image Name: Linux kernel for PQ2FADS
       Image Type: PowerPC Linux Kernel Image (gzip compressed)
       Data Size: 811160 Bytes = 792.1 kB
       Load Address: 00000000
       Entry Point: 00000000
       Verifying Checksum ... OK
       Uncompressing Kernel Image ... OK
    MPC82xxADS/PQ2FADS board support by Arabella
    Memory BAT mapping: BAT2=32Mb, BAT3=0Mb, residual: 0Mb
    Linux version 2.4.26 (root@localhost.localdomain) (gcc version 3.3.2)
    #1 Wed May 4 22:30:56 UTC 2005
    ADS setup arch
    MPC82xx PCI bridge initialization
    On node 0 totalpages: 8192
    zone(0): 8192 pages.
    zone(1): 0 pages.
    zone(2): 0 pages.
    Kernel command line: root=/dev/mtdblock2
    ADS init IRQ. NR_IRQS=256
    PIC: fully preemptible IRQ mode
    ADS time init
    ADS calibrate decrementer. FREQ=66000000, tb_ticks_per_jiffy=165000
    Calibrating delay loop... 175.71 BogoMIPS
    Memory: 30472k available (1252k kernel code, 388k data, 224k init, 0k
    highmem)
    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)
    POSIX conformance testing by UNIFIX
    PCI: Probing PCI hardware
    ADS init
    Linux NET4.0 for Linux 2.4
    Based upon Swansea University Computer Society NET3.039
    Initializing RT netlink socket
    Starting kswapd
    devfs: v1.12c (20020818) Richard Gooch (rgooch@atnf.csiro.au)
    devfs: boot_options: 0x0
    JFFS2 version 2.1. (C) 2001 Red Hat, Inc., designed by Axis
    Communications AB.
    pty: 256 Unix98 ptys configured
    Generic RTC Driver v1.07
    devsoc: devsoc_init:
    loop: loaded (max 8 devices)
    PPP generic driver version 2.4.2
    PPP Deflate Compression module registered
    flash: 8192KB at FF800000
    Number of erase regions: 2
    Primary Vendor Command Set: 0003 (Intel/Sharp Standard)
    Primary Algorithm Table at 0035
    Alternative Vendor Command Set: 0000 (None)
    No Alternate Algorithm Table
    Vcc Minimum: 2.7 V
    Vcc Maximum: 3.6 V
    Vpp Minimum: b.4 V
    Vpp Maximum: c.6 V
    Typical byte/word write timeout: 32 us
    Maximum byte/word write timeout: 512 us
    Full buffer write not supported
    Typical block erase timeout: 1024 ms
    Maximum block erase timeout: 8192 ms
    Chip erase not supported
    Device size: 0x400000 bytes (4 MiB)
    Flash Device Interface description: 0x0001
      - x16-only asynchronous interface
    Max. bytes in buffer write: 0x1
    Number of Erase Block Regions: 2
      Erase Region #0: BlockSize 0x2000 bytes, 8 blocks
      Erase Region #1: BlockSize 0x10000 bytes, 63 blocks
    cfi_cmdset_0001: Erase suspend on write enabled
    Using word write method
    Creating 4 MTD partitions on "Intel Flash":
    0x00000000-0x00040000 : "HRCW"
    0x00040000-0x00700000 : "JFFS2"
    0x00700000-0x00780000 : "U-Boot"
    0x00780000-0x00800000 : "Kernel"
    MPC8260 FCC Ethernet driver
    devsoc_xcc_create c03c0000
    MDIO on PC10, MDC on PC11
    Created eth0
    devsoc_xcc_create c03a0000
    MDIO on PC10, MDC on PC11
    Created eth1
    NET4: Linux TCP/IP 1.0 for NET4.0
    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.
    Machine check in kernel mode.
    Caused by (from SRR1=89032): Machine check signal
    Oops: machine check, sig: 7
    NIP: C008D840 XER: 20000000 LR: C00912E4 SP: C025FCA0 REGS: c025fbf0
    TRAP: 0200
       Not tainted
    MSR: 00089032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
    TASK = c025e000[1] 'swapper' Last syscall: 120
    last math 00000000 last altivec 00000000
    GPR00: 0000004C C025FCA0 C025E000 C038188C C0367A54 35BB7372 00000002
    C0363000
    GPR08: C03631E0 C038189C 0000025D C038189C 00040000 7EFFCFFD 01FFF000
    00000001
    GPR16: FFFFFFFF 00000000 00000000 01FF9424 003FF000 00000002 C0296574
    C0296554
    GPR24: C029654C 00000000 C0366910 C025FD58 00000000 C02964E4 0000025D
    C0367A54
    Call backtrace:
    C00912B8 C0091548 C0090F3C C00906F8 C0093454 C008FB1C C0041034
    C0041430 C0056060 C00563E4 C005691C C0173A08 C0003BC0 C00039A4
    C000642C
    Kernel panic: Attempted to kill init!
     <0>Rebooting in 180 seconds..

    If there is no crash, the next lines under the "NET4: Unix domain
    sockets 1.0/SMP for Linux NET4.0." line are:

    VFS: Mounted root (jffs2 filesystem) readonly.
    Freeing unused kernel memory: 220k init
    *** Running rc.modules
    *** Running rc.serial
    *** Attempting to start S05syslog
    *** Attempting to start S15inet
    Starting inetd
    Done
    *** Attempting to start S20network
    *** Running rc.local

    (none) login: root
    login[44]: root login on `ttyS0'

            
    #

  • Next message: Robert Redelmeier: "Re: Debug level "fixes" crash?"

    Relevant Pages

    • Debug level "fixes" crash?
      ... Image Name: Linux kernel for PQ2FADS ... ADS init IRQ. ... Typical block erase timeout: 1024 ms ...
      (comp.os.linux.development.system)
    • Cyclades TS800 Firmware Upgrade
      ... Linux NET4.0 for Linux 2.2 ... inode bitma6 ... Freeing unused kernel memory: 32k init ... Kernel panic: No init found. ...
      (linux.redhat)
    • Re: Scheduler: SIGSTOP on multi threaded processes
      ... I don't think the kernel handler gets a chance to do anything ... because SYS-V init installs its own handler. ... about Linux misbehavior in the code. ... Now, if POSIX threads signals were implimented within the kernel, ...
      (Linux-Kernel)
    • Re: differences between kernel-tree and kernel-source and kernel image
      ... > will this install the kernel or try to patch an existing 2.6 kernel or ... affix-source - Driver source for the Affix Bluetooth protocol stack for Linux ... atlas-doc - Automatically Tuned Linear Algebra Software,documentation ...
      (Debian-User)
    • [PATCH] LogFS take three
      ... Add LogFS, a scalable flash filesystem. ... The two main problems of JFFS2 are memory consumption and mount time. ... * As should be obvious for Linux kernel code, ...
      (Linux-Kernel)