kdump gets stuck during copying of /proc/vmcore
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After the kdump kernel has been loaded, the last messages seen on the screen, before the kdump kernel hangs, looks like the following:
waiting for devices /dev/sde1 to appear: ok
rootfs: major=8 minor=3 devn=2051
ok, dumping to /dev/sde1
After the above lines, there is no more activities.
Obviously, the copy process cp /proc/vmcore /dev/sde1 did not succeed.
NB: Here it is assumed that /dev/sde1 is the KDUMP_DUMPDEVICE.
1) set the following values under /etc/sysconfig/dump
KEXEC_OPTIONS=" --args-linux "
KDUMP_DUMPDEV="/dev/sde1" #---------> /dev/sde1 is just an example, please change it.
KDUMP_DUMPLEVEL=31 (or KDUMP_DUMPLEVEL=0x31) does strip all information that is not needed for the analysis. KDUMP_DUMPFORMAT is used to reduce the size of the dump.
2) Install makedumpfile package if it is not already installed. This package is needed whenever a KDUMP_DUMPLEVEL different from 0 is set.
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- Document ID:7002347
- Creation Date: 12-Jan-2009
- Modified Date:24-Mar-2021
- SUSE Linux Enterprise Server
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