linux-kernel - Re: [PATCH 0/8] x86, acpi: Move acpi_initrd

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Message-ID: <20130823203050.GB31817@sgi.com>
Date:	Fri, 23 Aug 2013 15:30:50 -0500
From:	Russ Anderson <rja@....com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Zhang Yanfei <zhangyanfei.yes@...il.com>,
	Toshi Kani <toshi.kani@...com>, Tejun Heo <tj@...nel.org>,
	Tang Chen <tangchen@...fujitsu.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Bob Moore <robert.moore@...el.com>,
	Lv Zheng <lv.zheng@...el.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Renninger <trenn@...e.de>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Mel Gorman <mgorman@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/8] x86, acpi: Move acpi_initrd_override() earlier.

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@...or.com> wrote:
> >
> > BRK makes sense as long as you can set a sane O(1) size limit.
> >
> >>
> >>put the acpi override table in BRK, we still need ok from HPA.
> >>I have impression that he did not like it, so want to confirm from him.
> 
> on 8 sockets system:
> -rw-r--r-- 1 root root   3532 Aug 22 10:26 APIC.dat
> -rw-r--r-- 1 root root     48 Aug 22 10:26 BDAT.dat
> -rw-r--r-- 1 root root    824 Aug 22 10:26 DMAR.dat
> -rw-r--r-- 1 root root  83509 Aug 22 10:26 DSDT.dat
> -rw-r--r-- 1 root root    244 Aug 22 10:26 FACP.dat
> -rw-r--r-- 1 root root     64 Aug 22 10:26 FACS.dat
> -rw-r--r-- 1 root root     68 Aug 22 10:26 FPDT.dat
> -rw-r--r-- 1 root root     56 Aug 22 10:26 HPET.dat
> -rw-r--r-- 1 root root    304 Aug 22 10:26 MCEJ.dat
> -rw-r--r-- 1 root root     60 Aug 22 10:26 MCFG.dat
> -rw-r--r-- 1 root root   6712 Aug 22 10:26 MPST.dat
> -rw-r--r-- 1 root root    232 Aug 22 10:26 MSCT.dat
> -rw-r--r-- 1 root root    172 Aug 22 10:26 PCCT.dat
> -rw-r--r-- 1 root root     96 Aug 22 10:26 PMCT.dat
> -rw-r--r-- 1 root root     48 Aug 22 10:26 RASF.dat
> -rw-r--r-- 1 root root    108 Aug 22 10:26 SLIT.dat
> -rw-r--r-- 1 root root     80 Aug 22 10:26 SPCR.dat
> -rw-r--r-- 1 root root     65 Aug 22 10:26 SPMI.dat
> -rw-r--r-- 1 root root   6448 Aug 22 10:26 SRAT.dat
> -rw-r--r-- 1 root root    100 Aug 22 10:26 SSDT1.dat
> -rw-r--r-- 1 root root 283527 Aug 22 10:26 SSDT2.dat
> -rw-r--r-- 1 root root     66 Aug 22 10:26 UEFI.dat
> -rw-r--r-- 1 root root     64 Aug 22 10:26 WDDT.dat
> 
> assume for 32sockets will have four times bigger with DSDT and SSDT.
> (with more pci and cpus)
> 
> So we can not have O(1) the size.
> 
> 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)

-- 
Russ Anderson, OS RAS/Partitioning Project Lead  
SGI - Silicon Graphics Inc          rja@....com
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