crash: page excluded: kernel virtual address: ffffffff841bfbb0 type: "page_offset_base"

crash -d 1 ./vmlinux ./vmcore

報錯退出。有一個workaround:

1. 修改/etc/kdump.conf:

• core_collector makedumpfile -l --message-level 1 -d 31

• core_collector cp

2. systemctl restart kdump;
3. 再次panic，生成的vmcore > 2G, crash解析正常。

參考：

1. https://listman.redhat.com/archives/crash-utility/2017-November/msg00049.html
2. https://www.suse.com/support/kb/doc/?id=000019313