[Crash-utility] Crash debugging vmcore, start error problem, crash seekerror: kernel virtual address: fffffffffffffffa0 type: "kmem_cache buffer"

[于宸xpp]

hi:
There is a problem that has been bothering me for several days. On the x86_64 platform, I used crash to debug the vmcore file, but the crash cannot be started normally during startup, and the error is as follows:



# crash  vmlinux  vmcore


please wait...(gathering kmem slab cache data)
crash seek error: kernel virtual address: fffffffffffffffa0 type: "kmem_cache buffer"
crash: unable to initialize kmem slab cache subsystem
crash: cannot determine idle task addresses from init_tasks[] or runqueues[] 
 crash: cannot resolve "init_task_union" 


At the beginning, I used crash7.0 version and reported the error: vmlinux is not SMP -- vmcore is SMP, so I have updated to version crash7.2. it was solved。But there are still another startup errors, crash: cannot determine idle task addresses from init_tasks[] or runqueues[] -------  crash: cannot resolve "init_task_union" 


--My hardware and software information:
The arch: x86_64
intel 8 the core CPU:
Memroy: 8 gb


The kernel version: 4.4.39
Kexec version: 2.0.14
Crash version: 7.2.0



kernel config:
CONFIG_CRASH_DUMP=y
CONFIG_KEXEC=y
CONFIG_SYSFS=y
CONFIG_DEBUG_INFO=y
CONFIG_PROC_VMCORE=y
CONFIG_RELOCATABLE=y





Ask for help:
1.Why did crash throw these errors? Is there a problem with my kernel configuration, or is there something else?
2.Can you give me some help according to my log?
-- eager for your response






 





 




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