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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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