[PATCH v23 0/9] arm64: add kdump support

Ruslan Bilovol ruslan.bilovol at gmail.com
Fri Jul 29 09:26:03 PDT 2016


On Tue, Jul 26, 2016 at 11:09 AM, AKASHI Takahiro
<takahiro.akashi at linaro.org> wrote:
> On Tue, Jul 26, 2016 at 04:56:51PM +0900, AKASHI Takahiro wrote:
>> This patch series adds kdump support on arm64.
>> To load a crash-dump kernel to the systems, a series of patches to
>> kexec-tools, which have not yet been merged upstream, are needed.
>> Please pick Geoff's kexec patches [1] and my kdump patches [2].
>> To examine vmcore (/proc/vmcore) on a crash-dump kernel, you can use
>>   - crash utility (coming v7.1.6 or later) [3]
>>     (Necessary patches have already been queued in the master.)
>> [1]  http://lists.infradead.org/pipermail/kexec/2016-July/016532.html
>> [2]  TBD
> See my kexec-tools patches in:
> http://lists.infradead.org/pipermail/kexec/2016-July/016642.html

I tired this patch series with mentioned Geoff's kexec patches and
your kdump patches, but unfortunately it doesn't work for me.

While I can successfully load and kexec the kernel ('kexec --load' +
'kexec -e'), same combination of kernel+ramdisk+dtb doesn't boot
if I do kdump combination ('kexec -p' + sysrq crash), there is no
any output after sysrq crash trace.
Unfortunately I don't have any debugger here for deep investigation
of this issue.

Also for some reason in case of 'load and kexec the kernel' it
takes 1-2 minutes to start booting after I do kexec -e, need to
investigate it further.

Which hardware do you use for validating your patches?

Also, could you please share exact commands you use for
kdump validation?

Best regaerds,

More information about the kexec mailing list