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Thread: Wrong amount of memory displayed by free and kernel

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    Join Date
    Apr 2010
    Beans
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    Wrong amount of memory displayed by free and kernel

    I have just discovered an inconsistancy in my new server setup. When I issue the free -m command the output states that I have 1993 total memory available when I know for a fact that this machine has 6GB installed. The kernel agrees with this number but dmidecode does not. I am posting the output of the commands to make my problem clearer. Is this a kernel bug?

    Code:
    $ free -m
                 total       used       free     shared    buffers     cached
    Mem:          1993        287       1705          0         77        103
    -/+ buffers/cache:        105       1887
    Swap:         2181          0       2181
    Code:
    dmesg | grep Memory
    [    0.000000] Memory: 2022324k/2088512k available (6820k kernel code, 456k absent, 65732k reserved, 6347k data, 948k init)
    Code:
    sudo dmidecode
    
    Handle 0x0002, DMI type 2, 10 bytes
    Base Board Information
            Manufacturer:  EVGA
            Product Name: 132-BL-E758
            Version: Tylersburg
            Serial Number:
            Asset Tag:
            Features:
                    Board is a hosting board
    
    Handle 0x0005, DMI type 5, 28 bytes
    Memory Controller Information
            Error Detecting Method: 8-bit Parity
            Error Correcting Capabilities:
                    None
            Supported Interleave: One-way Interleave
            Current Interleave: One-way Interleave
            Maximum Memory Module Size: 2048 MB
            Maximum Total Memory Size: 12288 MB
            Supported Speeds:
                    Other
            Supported Memory Types:
                    DIMM
            Memory Module Voltage: 5.0 V
            Associated Memory Slots: 6
                    0x0006
                    0x0007
                    0x0008
                    0x0009
                    0x000A
                    0x000B
            Enabled Error Correcting Capabilities:
                    None
    
    Handle 0x0006, DMI type 6, 12 bytes
    Memory Module Information
            Socket Designation: A0
            Bank Connections: 0 1
            Current Speed: Unknown
            Type: DIMM
            Installed Size: 2048 MB (Double-bank Connection)
            Enabled Size: 2048 MB (Double-bank Connection)
            Error Status: OK
    
    Handle 0x0007, DMI type 6, 12 bytes
    Memory Module Information
            Socket Designation: A1
            Bank Connections: None
            Current Speed: Unknown
            Type: Unknown
            Installed Size: Not Installed
            Enabled Size: Not Installed
            Error Status: OK
    
    Handle 0x0008, DMI type 6, 12 bytes
    Memory Module Information
            Socket Designation: A2
            Bank Connections: 4 5
            Current Speed: Unknown
            Type: DIMM
            Installed Size: 2048 MB (Double-bank Connection)
            Enabled Size: 2048 MB (Double-bank Connection)
            Error Status: OK
    
    Handle 0x0009, DMI type 6, 12 bytes
    Memory Module Information
            Socket Designation: A3
            Bank Connections: None
            Current Speed: Unknown
            Type: Unknown
            Installed Size: Not Installed
            Enabled Size: Not Installed
            Error Status: OK
    
    Handle 0x000A, DMI type 6, 12 bytes
    Memory Module Information
            Socket Designation: A4
            Bank Connections: 8 9
            Current Speed: Unknown
            Type: DIMM
            Installed Size: 2048 MB (Double-bank Connection)
            Enabled Size: 2048 MB (Double-bank Connection)
            Error Status: OK
    
    Handle 0x000B, DMI type 6, 12 bytes
    Memory Module Information
            Socket Designation: A5
            Bank Connections: None
            Current Speed: Unknown
            Type: Unknown
            Installed Size: Not Installed
            Enabled Size: Not Installed
            Error Status: OK
    
    Handle 0x0023, DMI type 16, 15 bytes
    Physical Memory Array
            Location: System Board Or Motherboard
            Use: System Memory
            Error Correction Type: None
            Maximum Capacity: 6 GB
            Error Information Handle: Not Provided
            Number Of Devices: 6
    
    Handle 0x0024, DMI type 17, 27 bytes
    Memory Device
            Array Handle: 0x0023
            Error Information Handle: Not Provided
            Total Width: 1 bits
            Data Width: 65508 bits
            Size: 2048 MB
            Form Factor: DIMM
            Set: None
            Locator: A0
            Bank Locator: Bank0/1
            Type: DDR2
            Type Detail: Synchronous
            Speed: Unknown
            Manufacturer: None
            Serial Number: None
            Asset Tag: None
            Part Number: None
    
    Handle 0x0025, DMI type 17, 27 bytes
    Memory Device
            Array Handle: 0x0023
            Error Information Handle: Not Provided
            Total Width: Unknown
            Data Width: Unknown
            Size: No Module Installed
            Form Factor: DIMM
            Set: None
            Locator: A1
            Bank Locator: Bank2/3
            Type: Unknown
            Type Detail: Unknown
            Speed: Unknown
            Manufacturer: None
            Serial Number: None
            Asset Tag: None
            Part Number: None
    
    Handle 0x0026, DMI type 17, 27 bytes
    Memory Device
            Array Handle: 0x0023
            Error Information Handle: Not Provided
            Total Width: 1 bits
            Data Width: 65508 bits
            Size: 2048 MB
            Form Factor: DIMM
            Set: None
            Locator: A2
            Bank Locator: Bank4/5
            Type: DDR2
            Type Detail: Synchronous
            Speed: Unknown
            Manufacturer: None
            Serial Number: None
            Asset Tag: None
            Part Number: None
    
    Handle 0x0027, DMI type 17, 27 bytes
    Memory Device
            Array Handle: 0x0023
            Error Information Handle: Not Provided
            Total Width: Unknown
            Data Width: Unknown
            Size: No Module Installed
            Form Factor: DIMM
            Set: None
            Locator: A3
            Bank Locator: Bank6/7
            Type: Unknown
            Type Detail: Unknown
            Speed: Unknown
            Manufacturer: None
            Serial Number: None
            Asset Tag: None
            Part Number: None
    
    Handle 0x0028, DMI type 17, 27 bytes
    Memory Device
            Array Handle: 0x0023
            Error Information Handle: Not Provided
            Total Width: 1 bits
            Data Width: 65508 bits
            Size: 2048 MB
            Form Factor: DIMM
            Set: None
            Locator: A4
            Bank Locator: Bank8/9
            Type: DDR2
            Type Detail: Synchronous
            Speed: Unknown
            Manufacturer: None
            Serial Number: None
            Asset Tag: None
            Part Number: None
    
    Handle 0x0029, DMI type 17, 27 bytes
    Memory Device
            Array Handle: 0x0023
            Error Information Handle: Not Provided
            Total Width: Unknown
            Data Width: Unknown
            Size: No Module Installed
            Form Factor: DIMM
            Set: None
            Locator: A5
            Bank Locator: Bank10/11
            Type: Unknown
            Type Detail: Unknown
            Speed: Unknown
            Manufacturer: None
            Serial Number: None
            Asset Tag: None
            Part Number: None
    
    Handle 0x002A, DMI type 18, 23 bytes
    32-bit Memory Error Information
            Type: Other
            Granularity: Other
            Operation: Other
            Vendor Syndrome: Unknown
            Memory Array Address: Unknown
            Device Address: Unknown
            Resolution: Unknown
    
    Handle 0x002B, DMI type 19, 15 bytes
    Memory Array Mapped Address
            Starting Address: 0x00000000000
            Ending Address: 0x0017FFFFFFF
            Range Size: 6 GB
            Physical Array Handle: 0x0024
            Partition Width: 1
    
    Handle 0x002C, DMI type 20, 19 bytes
    Memory Device Mapped Address
            Starting Address: 0x00000000000
            Ending Address: 0x0007FFFFFFF
            Range Size: 2 GB
            Physical Device Handle: 0x0025
            Memory Array Mapped Address Handle: 0x002B
            Partition Row Position: 1
    
    Handle 0x002D, DMI type 20, 19 bytes
    Memory Device Mapped Address
            Starting Address: 0x00000000000
            Ending Address: 0x000000003FF
            Range Size: 1 kB
            Physical Device Handle: 0x0026
            Memory Array Mapped Address Handle: 0x002B
            Partition Row Position: 1
    
    Handle 0x002E, DMI type 20, 19 bytes
    Memory Device Mapped Address
            Starting Address: 0x00080000000
            Ending Address: 0x000FFFFFFFF
            Range Size: 2 GB
            Physical Device Handle: 0x0027
            Memory Array Mapped Address Handle: 0x002B
            Partition Row Position: 1
    
    Handle 0x002F, DMI type 20, 19 bytes
    Memory Device Mapped Address
            Starting Address: 0x00000000000
            Ending Address: 0x000000003FF
            Range Size: 1 kB
            Physical Device Handle: 0x0028
            Memory Array Mapped Address Handle: 0x002B
            Partition Row Position: 1
    
    Handle 0x0030, DMI type 20, 19 bytes
    Memory Device Mapped Address
            Starting Address: 0x00100000000
            Ending Address: 0x0017FFFFFFF
            Range Size: 2 GB
            Physical Device Handle: 0x0029
            Memory Array Mapped Address Handle: 0x002B
            Partition Row Position: 1
    
    Handle 0x0031, DMI type 20, 19 bytes
    Memory Device Mapped Address
            Starting Address: 0x00000000000
            Ending Address: 0x000000003FF
            Range Size: 1 kB
            Physical Device Handle: 0x002A
            Memory Array Mapped Address Handle: 0x002B
            Partition Row Position: 1
    Last edited by Nattereri; May 16th, 2013 at 12:55 PM.

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