Re: [Fastboot] IA64 Kdump patch V3

[Jay Lan <jlan@sgi.com>]

Zou, Nanhai wrote:
>>-----Original Message-----
>>From: Jay Lan [mailto:jlan@sgi.com]
>>Sent: 2006年8月30日 9:27
>>To: Zou, Nanhai
>>Cc: Linux-IA64; fastboot; Luck, Tony; Dave Anderson; Eric W. Biederman; Horms
>>Subject: Re: [Fastboot] IA64 Kdump patch V3
>>
>>Jay Lan wrote:
>>
>>>Hi Nanhai,
>>>
>>>There is a problem in sn2. The sn2 does not have any memory with
>>>a predictible offset. It is not possible to specify a memory location
>>>at boot.
>>>
>>>I modified the efi_initialize_iomem_resources() routine in
>>>arch/ia64/kernel/efi.c to calculate crashk_res.start and .end on the
>>>fly and uses the "A" of crashkernel=A@B as size to find a region
>>>that fits.
>>>
>>>Maybe we should separate A and B as two options?
>>
>>The "B" part of the crashkernel boot option is meaningless to sn2
>>machine and can be very confusing to sn2 users.
>>
> 
> 
>  Hi, Jay
> 	It is possible to have only A option and let kernel determine the B address at startup time. Horms has patch to do that, I will merge it.
> 
That would be great!

> 
>>>I now have memory reserved, but kernal hanged when executing 'kexec'
>>>command. There must be similar issues in kexec.
>>
>>On further debugging, the kexec dumped core instead at this statement:
>>+        elf_rel_set_symbol(&info->rhdr, "__boot_param_base",
>>+                        &boot_param_base, sizeof(long));
>>
>>of elf_ia64_load() in kexec/arch/ia64/kexec-elf-ia64.c.
>>
>>Examing the memory i found "__boot_param_base" indeed not present in
>>the symbol table.
>>
>>It seems that purgatory/arch/ia64/entry.S does not have a line
>>+DECLARE_DATAB(____boot_param_base).
>>Is it not needed in other ia64 machines? How does it work in HP
>>machines?
> 
>   There is a DECLARE_DATA8(__boot_param_base) in purgatory/arch/ia64/entry.S
>   Are you using kexec-tools-kdump10 patch?

Yes, i apply the kexec-tools-kdump10 patch and the "reserve efi memmap
and boot param" patch from you. Only these two. Did i miss any?

Thanks,
  - jay


>  
>  Thanks
>  Zou Nan hai
> 
>>Thanks,
>>  - jay
>>