RE: [Fastboot] IA64 Kdump patch V3

From: Zou, Nanhai <nanhai.zou_at_intel.com>
Date: 2006-08-30 11:38:47
> -----Original Message-----
> From: Jay Lan [mailto:jlan@sgi.com]
> Sent: 2006830 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.

> >
> > 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?
 
 Thanks
 Zou Nan hai
> 
> Thanks,
>   - jay
> 
-
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Received on Wed Aug 30 11:40:14 2006

This archive was generated by hypermail 2.1.8 : 2006-08-30 11:40:24 EST