Messages in this thread | | | Date | Sat, 22 Aug 2009 11:48:52 -0700 | Subject | Re: amd64 + mtrr: only 3.1gb of 8gb are covered, kernel 2.6.30 and earlier. | From | Yinghai Lu <> |
| |
On Fri, Aug 21, 2009 at 9:14 AM, Volker Armin Hemmann<volkerarmin@googlemail.com> wrote: > Hi, > > I have an amd64 system with 8GB ram. Of these only 3.1GB are currently covered > with mtrr: > cat /proc/mtrr > reg00: base=0x000000000 ( 0MB), size= 2048MB, count=1: write-back > reg01: base=0x080000000 ( 2048MB), size= 1024MB, count=1: write-back > reg02: base=0x0c0000000 ( 3072MB), size= 128MB, count=1: write-back > > This is with a Phenom II X4. Mobo is an Asrock A770Crossfire with AMD 770 > chipset. Ram is 1066 ddr2 running at 800. > > Before that I had a X2 6000 where I had one more mtrr, covering additional > 256mb with 6gb ram total. > > When I use the opensource driver, I get a 'mtrr disabled' message when X > starts, nothing like that with fglrx. The results are the same. > > Is there anything that I can do about it? I already played with mtrr cleanup > options - without any results. > > Except for reiser4 the kernel is 'vanilla', config is attached, dmesg and lspci > are folloiwing: > > dmesg: > [ 0.000000] Linux version 2.6.30.5r4 (root@energy) (gcc version 4.4.1 > (Gentoo 4.4.1 p1.0) ) #1 SMP Tue Aug 18 06:28:18 CEST 2009 > [ 0.000000] Command line: root=/dev/md1 md=3,/dev/sda3,/dev/sdb3,/dev/sdc3 > nmi_watchdog=0 mtrr_spare_reg_nr=1 > [ 0.000000] KERNEL supported cpus: > [ 0.000000] Intel GenuineIntel > [ 0.000000] AMD AuthenticAMD > [ 0.000000] BIOS-provided physical RAM map: > [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) > [ 0.000000] BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) > [ 0.000000] BIOS-e820: 00000000000e6000 - 0000000000100000 (reserved) > [ 0.000000] BIOS-e820: 0000000000100000 - 00000000c7eb0000 (usable) > [ 0.000000] BIOS-e820: 00000000c7eb0000 - 00000000c7ec0000 (ACPI data) > [ 0.000000] BIOS-e820: 00000000c7ec0000 - 00000000c7ef0000 (ACPI NVS) > [ 0.000000] BIOS-e820: 00000000c7ef0000 - 00000000c7f00000 (reserved) > [ 0.000000] BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved) > [ 0.000000] BIOS-e820: 0000000100000000 - 0000000238000000 (usable) > [ 0.000000] DMI present. > [ 0.000000] AMI BIOS detected: BIOS may corrupt low RAM, working around it. > [ 0.000000] e820 update range: 0000000000000000 - 0000000000010000 (usable) > ==> (reserved) > [ 0.000000] last_pfn = 0x238000 max_arch_pfn = 0x100000000 > [ 0.000000] MTRR default type: uncachable > [ 0.000000] MTRR fixed ranges enabled: > [ 0.000000] 00000-9FFFF write-back > [ 0.000000] A0000-EFFFF uncachable > [ 0.000000] F0000-FFFFF write-protect > [ 0.000000] MTRR variable ranges enabled: > [ 0.000000] 0 base 000000000000 mask FFFF80000000 write-back > [ 0.000000] 1 base 000080000000 mask FFFFC0000000 write-back > [ 0.000000] 2 base 0000C0000000 mask FFFFF8000000 write-back > [ 0.000000] 3 disabled > [ 0.000000] 4 disabled > [ 0.000000] 5 disabled > [ 0.000000] 6 disabled > [ 0.000000] 7 disabled > [ 0.000000] TOM2: 0000000238000000 aka 9088M > [ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new > 0x7010600070106 > [ 0.000000] e820 update range: 00000000c8000000 - 0000000100000000 (usable) > ==> (reserved) ... > > 02:00.0 VGA compatible controller: ATI Technologies Inc Radeon HD 3870 (prog- > if 00 [VGA controller]) > Subsystem: Info-Tek Corp. Device 4070 > Flags: bus master, fast devsel, latency 0, IRQ 30 > Memory at d0000000 (64-bit, prefetchable) [size=256M] > Memory at fdff0000 (64-bit, non-prefetchable) [size=64K] > I/O ports at b000 [size=256] > Expansion ROM at fdfc0000 [disabled] [size=128K] > Capabilities: [50] Power Management version 3 > Capabilities: [58] Express Legacy Endpoint, MSI 00 > Capabilities: [a0] MSI: Mask- 64bit+ Count=1/1 Enable+ > Capabilities: [100] Vendor Specific Information <?> > Kernel driver in use: fglrx_pci > Kernel modules: fglrx
after your start X server, how about cat /proc/mtrr?
thought there should be one WC entry about 256M... for graphics card.
YH -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |