makedumpfile: support for newer kernels [v4.9 onwards]

[Pratyush Anand]

On Thursday 08 June 2017 10:31 AM, Pratyush Anand wrote:
>
>
> On Thursday 08 June 2017 10:23 AM, Abhishek Shah wrote:
>> Hi Pratyush,
>> I have posted the same question on the list as well....
>> Maybe I will copy your response there and continue discussion...
>
> Ah..I was on PTO, and just chasing with volume of mails.
>
> I see your mail at list :-)
>
>> I am using yocto(2.3 version) to build makedumpfile, which fetches v1.6.1
>> makedumpfile and also applys some patches including arm64 specific patches.

What are these ARM64 specific patches? I believe, you do not need any topup in 
makedumpfile for ARM64 if you use v1.6.1.

>> We have VA_BITS set as 48 bits... I will get other information and post on the
>> list.

OK.

>>
>> Regards,
>> Abhishek
>>
>> On Jun 8, 2017 10:05 AM, "Pratyush Anand" <panand at redhat.com
>> <mailto:panand at redhat.com>> wrote:
>>
>>     Hi Abhishek,
>>
>>
>>     On Monday 05 June 2017 04:51 PM, Abhishek Shah wrote:
>>
>>         Hi Atsushi,
>>
>>         I am using makedumpfile utility to compress the ramdump taken by
>>         kexec/kdump,
>>         i.e. /proc/vmcore, on arm64 platform.
>>
>>         /proc/vmcore works fine with crash utility without passing it though
>>         makedumpfile, but the file generated by makedumpfile is not getting
>>         processed
>>         by crash utility; I am getting following error:
>>         crash: seek error: kernel virtual address: ffff8008000c16a0  type:
>> "memory
>>         section"
>>
>>         Makedumpfile currently seems to support kernel up to 4.8 as per
>>         documentation.
>>         Is there plan to support newer kernel? can you provide some pointers to
>>         modifications required for newer kernel support, if I can help?
>>
>>
>>     Are you using makedumpfile-1.6.1? I expect that it should work with latest
>>     ARM64 kernel as well. If it does not work, can you please share your
>>     kernel configuration specially about,
>>
>>     VA_BITS, PAGE_SHIFT, RANDOMIZE_BASE etc.
>>
>>     ..and please keep mailing list in CC so that you can get answer from more
>>     people. Also, other can get benefit from this conversation.
>>
>>     ~Pratyush
>>
>>

~Pratyush