Troubleshooting Kdump error "Memory for crashkernel is not reserved"

最新推荐文章于 2025-05-30 20:49:26 发布

转载最新推荐文章于 2025-05-30 20:49:26 发布 · 1.6k 阅读

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#Linux crashkernel

本文提供了解决Kdump服务启动时遇到内存未预留错误的方法，包括自动预留内存的条件、预留内存的具体格式及步骤，以及服务器重启后的操作。适用于RAM大于4GB的服务器。

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In case getting following error while starting kdump service

Memory for crashkernel is not reserved
Please reserve memory by passing "crashkernel=X@Y" parameter to the kernel

If your server is having more than 4GB of RAM then crashkernel=auto (in /etc/grub.conf line starting with kernel)will automatically Reserve memory else need to specify in following format:

crashkernel=0M-2G:128M,2G-6G:256M

NOTE : - Find attachment

If physical memory is 0MB to 2GB then 128MB of memory will be reserved
If physical memory is 2MB to 6GB then 256MB of memory will be reserved

Now REBOOT server for kdump changes to take effect (1st time after kdump installed, a new INITRD will be generated)

Thats it!!!