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

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 fro m 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