The next step is the configuration of kexec and kdump. The former is responsible for loading and running the crash kernel. For this to happen, the tool needs to know which kernel to load, where it is located, and whether any additional kernel options are necessary. The kdump configuration determines the settings for writing the kernel dump. These include the storage location, what information to include, optional compression, or splitting the dump.
Some time ago I was helping a friend with some kexec problems and written some notes on how to use it – here a CentOS based server was used, but the process should be pretty similiar also for other distributions. The main advantage is in skipping the BIOS init part which on servers takes quite …
kdump-tools manages the kdump feature of the Linux kernel. The /etc/default/kdump-tools file contains local configuration settings of kdump. This file is sourced into a shell script, so it's format should be consistent with shell scripting.
SUSE Linux Enterprise Server 11 SUSE Linux Enterprise Desktop 11 kdump This update for Kdump provides the following fixes and enhancements: * In multipath setups, make sure that only devices actually required by kdump are initialized in kdump environment. This reduces run-time memory requirements.
use_kdump=1 service命令を使うなどして、kdump-toolsを自動起動するようにしておく。 手動で起動するようにしておいても問題ない。
3. kdump使用 ubuntu配置的内核已使能kdump的支持, 故仅需要安装linux-crashdump包即可, sudo apt-get install linux-crashdump 该包包含crash, kdump-tools, grub等相关依赖. 安装过程中会修改kernel cmdline已预留kdump转储内核内存空间. 以及使能kdump.
Kdump is a UNIX-like kernel crash dump facility. I think it is built into the Linux Kernel now. lkcd - linux kernel crash dump - original (but deprecated) crash dump facility. Red Hat is working on a utility called crash to help with the analysis of kdump crash files.
If you don't use kdump I would just kill it off and be done with the thing. One way is to run systemctl mask kdump which will stop it, or yum remove kexec-tools . You can also amend the crashkernel=auto parameter on the kernel command line to [email protected] to get back the megabytes of memory it grabs and does nothing with.