topic Re: support kdump to compress /proc/vmcore using makedumpfile? in i.MX Processors

support kdump to compress /proc/vmcore using makedumpfile?

adorable — Thu, 05 Nov 2020 06:32:21 GMT

I am using imx6q - linux4.9.88.Now can enter to crash kernel,but using makedumpfile tools(which is compiled by myself),the errors as follow:

root@Hzncc:~# makedumpfile -c -d 31 /proc/vmcore /run/media/mmcblk1/crash.dump
The kernel version is not supported.
The makedumpfile operation may be incomplete.
check_release: Can't get the kernel version.
get_mm_flatmem: Can't get the address of mem_map.

makedumpfile Failed.

Because the vmcore is too large,just cp /proc/vmcore is so slowly.

My question is:

1、makedumpfile support ARM?

2、if makedumpfile could not sopport, how else could I to compress vmcore?

Re: support kdump to compress /proc/vmcore using makedumpfile?

b36401 — Mon, 09 Nov 2020 06:34:54 GMT

Which version of makedumpfile are you using?
Possibly this version does actually not support Linux 4.9 kernel.

Re: support kdump to compress /proc/vmcore using makedumpfile?

adorable — Tue, 10 Nov 2020 02:41:10 GMT

The lastest version:1.6.7 And thre README tell us this makedumpfile will support x86 and ppc.

I want to get a makedumpfile to compress the /proc/vmcore in 4.9.88 of my arm board.

Re: support kdump to compress /proc/vmcore using makedumpfile?

adorable — Wed, 11 Nov 2020 01:06:32 GMT

Finallly,I use ramoops to replace the kdump,due to the precious DDR.