Jay Lan wrote:
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.
Well, need a bit of clarification. :) The code hits a die() since elf_rel_find_symbol() returned -1. The die() routine would do an exit(1), but i changed die() to force a core dump to examine the memory. Regards, - jay
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
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