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#Reserve crashkernel for kdump by grubby <pre>grubby --args="crashkernl=128M" --update-kernel=$(grubby --default-kernel)</pre> Reboot system and check /proc/cmdline <pre>cat /proc/cmdline | grep "crashkernel"</pre>
#Reserve crashkernel for kdump by grubby <pre>grubby --args="crashkernl=128M" --update-kernel=$(grubby --default-kernel)</pre> Reboot system and check /proc/cmdline <pre>cat /proc/cmdline | grep "crashkernel"</pre>
#Edit /etc/kdump.conf. This is an example:
#Edit /etc/kdump.conf. This is an example:
     :<pre>    ext4 /dev/mapper/vg_dhcp6558-lv_root  
     <pre>    ext4 /dev/mapper/vg_dhcp6558-lv_root
     kdump_post /bin/kdump-script
     core_collector makedumpfile --nosuchoptions
     extra_bins /usr/bin/crash
     default halt </pre>
    extra_modules twofish-x86_64</pre>
#Apply changes and start kdump via service kdump restart
#Apply changes and start kdump via service kdump restart
|actions=
|actions=

Revision as of 07:53, 22 March 2012

Description

Setup

  1. Install Fedora 17 on your machine
  2. After system installed, check if kexec-tools kernel-debuginfo and crash is installed via
    rpm -q kexec-tools
    Or via yum
    yum install kexec-tools
  3. Reserve crashkernel for kdump by grubby 
    grubby --args="crashkernl=128M" --update-kernel=$(grubby --default-kernel)
    Reboot system and check /proc/cmdline
    cat /proc/cmdline | grep "crashkernel"
  4. Edit /etc/kdump.conf. This is an example:

    ext4 /dev/mapper/vg_dhcp6558-lv_root
    core_collector makedumpfile --nosuchoptions
    default halt 
  1. Apply changes and start kdump via service kdump restart

How to test

  1. Trigger crash via:
    echo c > /proc/sysrq-trigger

Expected Results

  1. Test failed if
    cat /proc/cmdline | grep "crashkernel"
    got nothing means reserve crashkernel memory failed
  2. Test failed if restart kdump failed
  3. Test suspend if rpm packages couldn't be installed