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楼主 |
发表于 2008-10-9 20:02:29
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的确是这样的,引自 http://www.ibm.com/developerworks/linux/library/l-kexec.html
The magic of kexec
The task of overwriting the old kernel with the new one is done in three stages:
1. Copy the new kernel into memory.
2. Move this kernel image into dynamic kernel memory.
3. Copy this image into the real destination (overwriting the current kernel), and start the new kernel. Benefits of kexec
Systems with high availability requirements and kernel developers who have to constantly reboot their systems will benefit most from kexec. Because kexec skips the most time-consuming parts of system reboot, namely the firmware stage, reboots are extremely quick and availability is increased.
Btw,原来该文章是有中文版的:
http://www.ibm.com/developerworks/cn/linux/l-kexec/index.html |
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