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SubjectRe: 2.6.16-rc5 huge memory detection regression
Dave Hansen wrote:
> On Wed, 2006-03-08 at 00:28 +0100, Martin MOKREJŠ wrote:
>
>>Ehm, I don't know why the kernel now sees 16GB. I rebooted again
>>with the vanilla 2.6.16-rc5 patched with only your e820 patch ...
>>how could print calls fix the problem? I am working completely
>>remotely. :((
>
>
> The suggestion to jiggle the DIMMs seems appropriate again. :)

So when the machine claims to have only 12GB of RAM, I see with lshw(1):

*-bank:6
description: DIMM DDR Synchronous 266 MHz (3.8 ns) [empty]
product: CM75SD2048RLP-3200
vendor:
physical id: 6
serial: 00000000
slot: DIMM 7
clock: 266MHz (3.7594ns)
*-bank:7
description: DIMM DDR Synchronous 266 MHz (3.8 ns) [empty]
product: CM75SD2048RLP-3200
vendor:
physical id: 7
serial: 00000000
slot: DIMM 8
clock: 266MHz (3.7594ns)


I am only curious why the product: field is not empty but rather
shows type of the actual module. All eight DIMMS are same Corsair
2GB RAM modules (sorry, I think I wrote Kingston previously but is
not true). Moreover, the modules are at 266MHz and not on 333MHz,
the board would take only 6 modules at 333MHz. So lshw should report
-2700 instead of -3200. Inspecting their serial numbers in the
invoice I see:

340540434
340540435
330541284
330541283
330541282
330541281
330541280
330541279

Yes, 2 are different. I guess your question would be whether those 2
unseen DIMMS are the first two serial numbers ... I can't say now
but definitely when only 8 GB of RAM are detected the problem would
include additional two DIMMs.

So, what would you recommend now. To flash from BIOS 1.20 to 1.50
and pray? ;-)

Martin
phylo
description: Tower Computer
product: MS-9136
vendor: MSI
version: Revision 0C
serial: 0123456789
width: 32 bits
capabilities: smbios-2.3 dmi-2.3
configuration: administrator_password=enabled boot=normal chassis=tower frontpanel_password=disabled keyboard_password=disabled power-on_password=disabled
*-core
description: Motherboard
product: MS-9136
vendor: MSI
physical id: 0
version: Revision 0C
serial: 9876543210
slot: L1 Cache for CPU#2
*-firmware
description: BIOS
vendor: Phoenix Technologies,Ltd
physical id: 0
version: 6.0.1.20 (11/03/2004)
size: 118KB
capacity: 960KB
capabilities: pci pnp upgrade shadowing escd cdboot bootselect edd int13floppynec int13floppytoshiba int13floppy720 int13floppy2880 int14serial int17printer int10video acpi usb ls120boot zipboot biosbootspecification netboot
*-cpu:0
description: CPU
product: Intel(R) Xeon(TM) CPU 3.00GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: 15.4.1
serial: 0000-0F41-0000-0000-0000-0000
slot: CPU#1
size: 3GHz
capacity: 3600MHz
width: 64 bits
clock: 200MHz
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx x86-64 constant_tsc pni monitor ds_cpl cid cx16 xtpr cpufreq
configuration: id=0
*-cache:0
description: L1 cache
physical id: 6
slot: L1 Cache for CPU#1
size: 16KB
capacity: 16KB
capabilities: burst pipeline-burst internal write-back data
*-cache:1
description: L2 cache
physical id: 7
slot: L2 Cache for CPU#1
size: 1MB
capacity: 1MB
capabilities: burst internal write-back unified
*-logicalcpu:0
description: Logical CPU
physical id: 0.1
width: 64 bits
capabilities: logical
*-logicalcpu:1
description: Logical CPU
physical id: 0.2
width: 64 bits
capabilities: logical
*-cpu:1
description: CPU
product: Intel(R) Xeon(TM) CPU 3.00GHz
vendor: Intel Corp.
physical id: 5
bus info: cpu@1
version: 15.4.1
serial: 0000-0F41-0000-0000-0000-0000
slot: CPU#2
size: 3GHz
capacity: 3600MHz
width: 64 bits
clock: 200MHz
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx x86-64 constant_tsc pni monitor ds_cpl cid cx16 xtpr cpufreq
configuration: id=6
*-cache:0
description: L1 cache
physical id: 9
slot: L1 Cache for CPU#2
size: 16KB
capacity: 16KB
capabilities: burst pipeline-burst internal write-back data
*-cache:1
description: L2 cache
physical id: a
slot: L2 Cache for CPU#2
size: 1MB
capacity: 1MB
capabilities: burst internal write-back unified
*-logicalcpu:0
description: Logical CPU
physical id: 6.1
width: 64 bits
capabilities: logical
*-logicalcpu:1
description: Logical CPU
physical id: 6.2
width: 64 bits
capabilities: logical
*-memory
description: System Memory
physical id: 28
slot: System board or motherboard
size: 12GB
*-bank:0
description: DIMM DDR Synchronous 266 MHz (3.8 ns)
product: CM74SD2048RLP-2100
vendor: 
physical id: 0
serial: 00000000
slot: DIMM 1
size: 2GB
width: 64 bits
clock: 266MHz (3.7594ns)
*-bank:1
description: DIMM DDR Synchronous 266 MHz (3.8 ns)
product: CM74SD2048RLP-2100
vendor: 
physical id: 1
serial: 00000000
slot: DIMM 2
size: 2GB
width: 64 bits
clock: 266MHz (3.7594ns)
*-bank:2
description: DIMM DDR Synchronous 266 MHz (3.8 ns)
product: CM75SD2048RLP-3200
vendor: 
physical id: 2
serial: 00000000
slot: DIMM 3
size: 2GB
width: 64 bits
clock: 266MHz (3.7594ns)
*-bank:3
description: DIMM DDR Synchronous 266 MHz (3.8 ns)
product: CM75SD2048RLP-3200
vendor: 
physical id: 3
serial: 00000000
slot: DIMM 4
size: 2GB
width: 64 bits
clock: 266MHz (3.7594ns)
*-bank:4
description: DIMM DDR Synchronous 266 MHz (3.8 ns)
product: CM75SD2048RLP-3200
vendor: 
physical id: 4
serial: 00000000
slot: DIMM 5
size: 2GB
width: 64 bits
clock: 266MHz (3.7594ns)
*-bank:5
description: DIMM DDR Synchronous 266 MHz (3.8 ns)
product: CM75SD2048RLP-3200
vendor: 
physical id: 5
serial: 00000000
slot: DIMM 6
size: 2GB
width: 64 bits
clock: 266MHz (3.7594ns)
*-bank:6
description: DIMM DDR Synchronous 266 MHz (3.8 ns) [empty]
product: CM75SD2048RLP-3200
vendor: 
physical id: 6
serial: 00000000
slot: DIMM 7
clock: 266MHz (3.7594ns)
*-bank:7
description: DIMM DDR Synchronous 266 MHz (3.8 ns) [empty]
product: CM75SD2048RLP-3200
vendor: 
physical id: 7
serial: 00000000
slot: DIMM 8
clock: 266MHz (3.7594ns)
*-pci
description: Host bridge
product: E7520 Memory Controller Hub
vendor: Intel Corporation
physical id: 100
bus info: pci@00:00.0
version: 0c
width: 32 bits
clock: 33MHz
*-generic UNCLAIMED
product: E7525/E7520 Error Reporting Registers
vendor: Intel Corporation
physical id: 0.1
bus info: pci@00:00.1
version: 0c
width: 32 bits
clock: 33MHz
*-system:0 UNCLAIMED
description: System peripheral
product: E7520 DMA Controller
vendor: Intel Corporation
physical id: 1
bus info: pci@00:01.0
version: 0c
width: 32 bits
clock: 33MHz
capabilities: cap_list
resources: iomemory:d0000000-d0000fff irq:10
*-pci:0
description: PCI bridge
product: E7525/E7520/E7320 PCI Express Port A
vendor: Intel Corporation
physical id: 2
bus info: pci@00:02.0
version: 0c
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
*-pci:0
description: PCI bridge
product: 6700PXH PCI Express-to-PCI Bridge A
vendor: Intel Corporation
physical id: 0
bus info: pci@01:00.0
version: 09
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
*-pci:1
description: PCI bridge
product: 6700PXH PCI Express-to-PCI Bridge B
vendor: Intel Corporation
physical id: 0.2
bus info: pci@01:00.2
version: 09
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
*-pci:1
description: PCI bridge
product: E7525/E7520 PCI Express Port B
vendor: Intel Corporation
physical id: 4
bus info: pci@00:04.0
version: 0c
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
*-pci:2
description: PCI bridge
product: E7520 PCI Express Port B1
vendor: Intel Corporation
physical id: 5
bus info: pci@00:05.0
version: 0c
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
*-pci:3
description: PCI bridge
product: E7520 PCI Express Port C
vendor: Intel Corporation
physical id: 6
bus info: pci@00:06.0
version: 0c
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
*-pci:4
description: PCI bridge
product: E7520 PCI Express Port C1
vendor: Intel Corporation
physical id: 7
bus info: pci@00:07.0
version: 0c
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
*-pci:5
description: PCI bridge
product: 6300ESB 64-bit PCI-X Bridge
vendor: Intel Corporation
physical id: 1c
bus info: pci@00:1c.0
version: 02
width: 32 bits
clock: 66MHz
capabilities: pci normal_decode bus_master cap_list
*-display
description: VGA compatible controller
product: Radeon RV100 QY [Radeon 7000/VE]
vendor: ATI Technologies Inc
physical id: 1
bus info: pci@08:01.0
version: 00
size: 128MB
width: 32 bits
clock: 66MHz
capabilities: vga cap_list
resources: iomemory:d8000000-dfffffff ioport:2000-20ff iomemory:d0100000-d010ffff irq:17
*-network:0
description: Ethernet interface
product: 82541GI/PI Gigabit Ethernet Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@08:02.0
logical name: eth0
version: 00
serial: 00:11:09:b6:c1:7a
size: 1GB/s
capacity: 1GB/s
width: 32 bits
clock: 66MHz
capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegociation
configuration: autonegociation=on broadcast=yes driver=e1000 driverversion=6.3.9-k4 duplex=full firmware=N/A ip=195.113.57.18 link=yes multicast=yes port=twisted pair speed=1GB/s
resources: iomemory:d0140000-d015ffff iomemory:d0120000-d013ffff ioport:2400-243f irq:18
*-network:1
description: Ethernet interface
product: 82541GI/PI Gigabit Ethernet Controller
vendor: Intel Corporation
physical id: 3
bus info: pci@08:03.0
logical name: eth1
version: 00
serial: 00:11:09:b6:c1:7b
capacity: 1GB/s
width: 32 bits
clock: 66MHz
capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegociation
configuration: autonegociation=on broadcast=yes driver=e1000 driverversion=6.3.9-k4 firmware=N/A ip=192.168.1.254 link=no multicast=yes port=twisted pair
resources: iomemory:d0180000-d019ffff iomemory:d0160000-d017ffff ioport:2440-247f irq:19
*-usb:0
description: USB Controller
product: 6300ESB USB Universal Host Controller
vendor: Intel Corporation
physical id: 1d
bus info: pci@00:1d.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd
resources: ioport:1400-141f irq:16
*-usbhost
product: UHCI Host Controller
vendor: Linux 2.6.16-rc5-git12 uhci_hcd
physical id: 1
bus info: usb@1
logical name: usb1
version: 2.06
capabilities: usb-1.10
configuration: driver=hub maxpower=0mA slots=2 speed=12.0MB/s
*-usb:1
description: USB Controller
product: 6300ESB USB Universal Host Controller
vendor: Intel Corporation
physical id: 1d.1
bus info: pci@00:1d.1
version: 02
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd
resources: ioport:1420-143f irq:22
*-usbhost
product: UHCI Host Controller
vendor: Linux 2.6.16-rc5-git12 uhci_hcd
physical id: 1
bus info: usb@2
logical name: usb2
version: 2.06
capabilities: usb-1.10
configuration: driver=hub maxpower=0mA slots=2 speed=12.0MB/s
*-system:1 UNCLAIMED
description: System peripheral
product: 6300ESB Watchdog Timer
vendor: Intel Corporation
physical id: 1d.4
bus info: pci@00:1d.4
version: 02
width: 32 bits
clock: 33MHz
resources: iomemory:d0001000-d000100f
*-system:2 UNCLAIMED
description: PIC
product: 6300ESB I/O Advanced Programmable Interrupt Controller
vendor: Intel Corporation
physical id: 1d.5
bus info: pci@00:1d.5
version: 02
width: 32 bits
clock: 33MHz
capabilities: io_x_-apic bus_master cap_list
*-usb:2
description: USB Controller
product: 6300ESB USB2 Enhanced Host Controller
vendor: Intel Corporation
physical id: 1d.7
bus info: pci@00:1d.7
version: 02
width: 32 bits
clock: 33MHz
capabilities: ehci bus_master cap_list
configuration: driver=ehci_hcd
resources: iomemory:d0001400-d00017ff irq:23
*-usbhost
product: EHCI Host Controller
vendor: Linux 2.6.16-rc5-git12 ehci_hcd
physical id: 1
bus info: usb@3
logical name: usb3
version: 2.06
capabilities: usb-2.00
configuration: driver=hub maxpower=0mA slots=4 speed=480.0MB/s
*-pci:6
description: PCI bridge
product: 82801 PCI Bridge
vendor: Intel Corporation
physical id: 1e
bus info: pci@00:1e.0
version: 0a
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master
*-network
description: Ethernet interface
product: 82541PI Gigabit Ethernet Controller
vendor: Intel Corporation
physical id: 1
bus info: pci@09:01.0
logical name: eth2
version: 05
serial: 00:0e:0c:84:83:71
capacity: 1GB/s
width: 32 bits
clock: 66MHz
capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegociation
configuration: autonegociation=on broadcast=yes driver=e1000 driverversion=6.3.9-k4 firmware=N/A ip=192.168.2.254 link=no multicast=yes port=twisted pair
resources: iomemory:d0220000-d023ffff iomemory:d0200000-d021ffff ioport:3000-303f irq:20
*-isa UNCLAIMED
description: ISA bridge
product: 6300ESB LPC Interface Controller
vendor: Intel Corporation
physical id: 1f
bus info: pci@00:1f.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: isa bus_master
*-ide:0
description: IDE interface
product: 6300ESB PATA Storage Controller
vendor: Intel Corporation
physical id: 1f.1
bus info: pci@00:1f.1
version: 02
width: 32 bits
clock: 33MHz
capabilities: ide bus_master
configuration: driver=PIIX_IDE
resources: ioport:1460-146f iomemory:d1100000-d11003ff irq:21
*-ide
description: IDE Channel 0
physical id: 0
bus info: ide@0
logical name: ide0
clock: 33MHz
*-cdrom
description: DVD reader
product: SONY DVD-ROM DDU1615
physical id: 0
bus info: ide@0.0
logical name: /dev/hda
version: FYS2
capabilities: packet atapi cdrom removable nonmagnetic dma lba iordy audio dvd
configuration: mode=udma2
*-disc
physical id: 0
logical name: /dev/hda
*-ide:1
description: IDE interface
product: 6300ESB SATA Storage Controller
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@00:1f.2
logical name: scsi0
logical name: scsi1
version: 02
width: 32 bits
clock: 66MHz
capabilities: ide bus_master emulated
configuration: driver=ata_piix
resources: ioport:14a8-14af ioport:149c-149f ioport:14a0-14a7 ioport:1498-149b ioport:1470-147f irq:21
*-disk:0
description: SCSI Disk
product: ST3200826AS
vendor: ATA
physical id: 0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: 3.03
serial: 3ND1H3NW
size: 186GB
capabilities: partitioned partitioned:dos
configuration: ansiversion=5
*-volume:0
description: Linux filesystem partition
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
capacity: 86MB
capabilities: primary bootable
*-volume:1
description: Linux swap / Solaris partition
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
capacity: 29GB
capabilities: primary nofs
*-volume:2
description: Linux filesystem partition
physical id: 3
bus info: scsi@0:0.0.0,3
logical name: /dev/sda3
capacity: 37GB
capabilities: primary
*-volume:3 UNCLAIMED
description: Linux filesystem partition
physical id: 4
bus info: scsi@0:0.0.0,4
capacity: 119GB
capabilities: primary
*-disk:1
description: SCSI Disk
product: ST3200826AS
vendor: ATA
physical id: 1
bus info: scsi@1:0.0.0
logical name: /dev/sdb
version: 3.03
serial: 3ND13NH3
size: 186GB
capabilities: partitioned partitioned:dos
configuration: ansiversion=5
*-volume
description: Linux filesystem partition
physical id: 1
bus info: scsi@1:0.0.0,1
logical name: /dev/sdb1
capacity: 186GB
capabilities: primary
*-serial
description: SMBus
product: 6300ESB SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@00:1f.3
version: 02
width: 32 bits
clock: 33MHz
configuration: driver=i801_smbus
resources: ioport:1440-145f irq:10
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