Re: [PATCH 0/8] x86, acpi: Move acpi_initrd_override() earlier.

chen tang
2013-08-23T21:50:59Z

Hi Yinghai,

2013/8/24 Yinghai Lu <yinghai@kernel.org>:
> On Fri, Aug 23, 2013 at 1:30 PM, Russ Anderson <rja@sgi.com> wrote:
>> On Fri, Aug 23, 2013 at 01:08:56PM -0700, Yinghai Lu wrote:
>>> On Fri, Aug 23, 2013 at 11:25 AM, H. Peter Anvin <hpa@zytor.com> wrote:
>
>>> Russ, What is ACPI table size on your big machine?
>>
>> This is from a 256 socket 32TB system.
>>
>> Reserving 256MB of memory at 66973408MB for crashkernel (System RAM: 32501719MB)
>> ACPI: RSDP 000000007ef3d014 00024 (v02 INTEL )
>> ACPI: XSDT 000000007ef3d120 0007C (v01 INTEL TIANO 00000000 01000013)
>> ACPI: FACP 000000007ef3a000 000F4 (v04 INTEL TIANO 00000000 MSFT 01000013)
>> ACPI: DSDT 000000007e6c3000 7F493E (v02 SGI2 UVX 00000002 MSFT 01000013)
>> ACPI: FACS 000000007d147000 00040
>> ACPI: UEFI 000000007ef3c000 0012A (v01 INTEL RstScuO 00000000 00000000)
>> ACPI: UEFI 000000007ef3b000 0005C (v01 INTEL RstScuV 00000000 00000000)
>> ACPI: HPET 000000007ef39000 00038 (v01 INTEL TIANO 00000001 MSFT 01000013)
>> ACPI: SSDT 000000007ef33000 05352 (v02 INTEL ROSECITY 00000003 INTL 20070508)
>> ACPI: SLIT 000000007ef10000 1002C (v01 SGI2 UVX 00000002 MSFT 00000001)
>> ACPI: APIC 000000007eeee000 10070 (v03 SGI2 UVX 00000002 MSFT 00000001)
>> ACPI: SRAT 000000007eeb8000 1A830 (v03 SGI2 UVX 00000002 MSFT 00000001)
>> ACPI: MCFG 000000007d6d4000 0105C (v01 SGI2 UVX 00000002 MSFT 00000001)
>> ACPI: SPCR 000000007e6c2000 00050 (v01 00000000 00000000)
>> ACPI: DMAR 000000007d6d3000 0013C (v01 INTEL TIANO 00000001 MSFT 01000013)
>>
>
> so the DSDT is 7F493E, and total is more than 8M.
>
> that will need BRK to be extended 16M?
>

Then how about use early_ioremap(), and don't do it that early in
head_32 and head64 ?

Thanks.