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.
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? Thanks, - jay
Regards, - jay
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