taishan server 2.5.0上openEuler20.03 LTS 触发kdump失败

这是一个bug还是新特性?:

以下两者二选一，请保留一项:

bug

发生结果:cma: Failed to reserve 512 MiB，无法预留连续内存，会导致触发kdump失败。

期望结果:希望能进行根因分析，并找到解决办法

如何重现（尽量详细）:在grub.cfg 文件中配置参数crashkernel=xxxM(xxx可以尝试预留不同的内存大小，比如512,640,768,1024),然后检查kdump服务状态是否OK，OK之后手动触发kdump：echo c > /proc/sysrq-trigger

补充说明?:无

环境情况:测试服务器类型为：taishan server 2.5.0

版本:
操作系统版本 (e.g. from /etc/os-release):openEuler 20.03 LTS
内核版本 (e.g. uname -a):Linux localhost.localdomain 4.19.90-2003.4.0.0036.oe1.aarch64
其它:

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