Kexec support in LinuxSH Edit

  • kexec kernel support patch for linux-2.6.13-sh
    • apply this patch
    • set kernel config option
      • Kernel features -> kexec system call

  • kexec-tools
    • binary and source
    • linux-zImage kernel boot support
      • append option support.
      • When the append option is not specified, /proc/cmdline is used.
    • NetBSD-elf Kernel boot support from Linux's kexec.
      • howto option support.
      • miniroot (ramdisk root file system) support.

  • debian binary package installation
    landisk:~# apt-get install kernel-image-2.6.13-sh kexec-tools
    
  • kexec command help
    landisk:~# kexec 
    No kernel specified
    kexec 1.99 released 21 December 2004
    Usage: kexec [OPTION]... [kernel]
    Directly reboot into a new kernel
    
     -h, --help           Print this help.
     -v, --version        Print the version of kexec.
     -f, --force          Force an immediate kexec, don't call shutdown.
     -x, --no-ifdown      Don't bring down network interfaces.
                          (if used, must be last option specified)
     -l, --load           Load the new kernel into the current kernel.
     -p, --load-panic     Load the new kernel for use on panic.
     -u, --unload         Unload the current kexec target kernel.
     -e, --exec           Execute a currently loaded kernel.
     -t, --type=TYPE      Specify the new kernel is of this type.
         --mem-min=<addr> Specify the lowest memory addres to load code into.
         --mem-max=<addr> Specify the highest memory addres to load code into.
    
    Supported kernel file types and options: 
    zImage-sh
     --append=STRING      Set the kernel command line to STRING.
     --empty-zero=ADDRESS Set the kernel top ADDRESS. 
    
    netbsd-sh
     --howto=VALUE        NetBSD kernel boot option.
     --miniroot=FILE      NetBSD miniroot ramdisk.
    
    Architecture options: 
     none
    
    Default options:
     --append="ro root=303 mem=64M console=ttySC1,9600"
     --empty-zero=0x0c001000
    
     STRING of --appned is set form /proc/cmdline as default.
     ADDRESS of --empty-zero can be set SHELL environment variable
     KEXEC_EMPTY_ZERO as default.
    
     ADDRESS can be get in the following method in your system. 
     1) "grep empty_zero /proc/kallsyms". 
     2) "grep empty_zero System.map". 
     3) CONFIG_MEMORY_START + CONFIG_ZERO_PAGE_OFFSET in your kernel
        config file.
    
    
  • example1 -- kexec linux kernel
    landisk:~# kexec --append="mem=64M console=ttySC1,9600 root=/dev/hda3 ro" /boot/zImage
    
  • example2 -- kexec NetBSD kernel (sample kernel of LANDISK and ramdisk image)
    landisk:~# kexec --miniroot=miniroot.img netbsd-RAMDISK
    
  • note
    shutdown command is called from kexec command automatically. Therefore, it is safe.

  • Appendix
    linux and tools for LANDISK(SH4)

    My English is very poor. Please edit it freely.

kexec support in linux-2.4.21-iodata Edit

  • kexec kernel support patch for linux-2.4.21-iodata

添付ファイル: filelinux-2.6.13-sh-kexec.patch 521件 [詳細] filelinux-2.4.21-iodata-kexec.patch 566件 [詳細]

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Last-modified: 2006-06-13 (火) 20:02:27 (6725d)