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装了二条2G的内存，系统上只认到2G。
版本 18246。
[root@apache17 WebRoot4]# cat /proc/meminfo
MemTotal: 2073948 kB
MemFree: 1944128 kB
Buffers: 6268 kB
Cached: 51996 kB
SwapCached: 0 kB
Active: 54032 kB
Inactive: 32124 kB
HighTotal: 1178496 kB
HighFree: 1090908 kB
LowTotal: 895452 kB
LowFree: 853220 kB
SwapTotal: 2096440 kB
SwapFree: 2096440 kB
Dirty: 4 kB
Writeback: 0 kB
AnonPages: 28008 kB
Mapped: 11852 kB
Slab: 32136 kB
PageTables: 2376 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 3133412 kB
Committed_AS: 161360 kB
VmallocTotal: 116728 kB
VmallocUsed: 5144 kB
VmallocChunk: 111240 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
Hugepagesize: 2048 kB
在硬件里是可以看到二条2G的内存的：
[root@apache17 WebRoot4]# dmidecode -t memory
# dmidecode 2.10
SMBIOS 2.4 present.
Handle 0x0005, DMI type 5, 24 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: 1024 MB
Maximum Total Memory Size: 4096 MB
Supported Speeds:
Other
Supported Memory Types:
Other
Memory Module Voltage: 5.0 V
Associated Memory Slots: 4
0x0006
0x0007
0x0008
0x0009
Enabled Error Correcting Capabilities:
None
Handle 0x0006, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: A0
Bank Connections: 1
Current Speed: Unknown
Type: Other
Installed Size: 2048 MB (Single-bank Connection)
Enabled Size: 2048 MB (Single-bank Connection)
Error Status: OK
Handle 0x0007, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: A1
Bank Connections: 2
Current Speed: Unknown
Type: Other
Installed Size: 2048 MB (Single-bank Connection)
Enabled Size: 2048 MB (Single-bank Connection)
Error Status: OK
Handle 0x0008, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: A2
Bank Connections: 3
Current Speed: Unknown
Type: Unknown
Installed Size: Not Installed
Enabled Size: Not Installed
Error Status: OK
Handle 0x0009, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: A3
Bank Connections: 4
Current Speed: Unknown
Type: Unknown
Installed Size: Not Installed
Enabled Size: Not Installed
Error Status: OK
Handle 0x001A, DMI type 16, 15 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 4 GB
Error Information Handle: Not Provided
Number Of Devices: 4
Handle 0x001B, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x001A
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Form Factor: DIMM
Set: None
Locator: A0
Bank Locator: Bank0/1
Type: Unknown
Type Detail: None
Speed: 800 MHz
Manufacturer:
Serial Number:
Asset Tag:
Part Number:
Handle 0x001C, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x001A
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Form Factor: DIMM
Set: None
Locator: A1
Bank Locator: Bank2/3
Type: Unknown
Type Detail: None
Speed: 800 MHz
Manufacturer:
Serial Number:
Asset Tag:
Part Number:
Handle 0x001D, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x001A
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: A2
Bank Locator: Bank4/5
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer:
Serial Number:
Asset Tag:
Part Number:
Handle 0x001E, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x001A
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: None
Speed: Unknown
Manufacturer:
Serial Number:
Asset Tag:
Part Number:
网上有人说用：
1 给 uname -r
2 yum install kernel-PAE
我也更新内核了，
[root@apache17 WebRoot4]# uname -r
2.6.18-238.9.1.el5.centos.plusPAE
[root@apache17 WebRoot4]# uname -a
Linux apache17 2.6.18-238.9.1.el5.centos.plusPAE #1 SMP Tue Apr 12 21:38:49 EDT 2011 i686 i686 i386 GNU/Linux
内核也编译过，选择了支持16G了。
那位高人指教一下。 |
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发表于 2011-04-21 14:20
发表于 2011-04-21 14:37
