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各位大家好,目前遇到一个问题,请高手指点下:
当前系统在一个2G内存的设备中,开机后Kernel居然显示4G。导致出现异常。
而此kernel在其它的2G内存环境中显示正常,运行正常,目前,出现问题的这个设备是使用cpu 3d bridge的双核CPU, 而正常启动的是G41架构的超线程CPU。
对于内存管理模块,代码中并没有改动,这里打印的是:static unsigned long __init setup_memory(void)
函数中的记录,但是在阅读此代码暂时未找到问题。如有知晓问题的高手请指点下,请各位高手赐教!非常感谢!!!
本人使用的版本是:FC4, 2.6.22
下边是详细的信息:
首先是错误信息:单条2G内存,CPU为3d bridge的双核CPU
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009b800 (usable)
BIOS-e820: 000000000009b800 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 0000000020000000 (usable)
BIOS-e820: 0000000020000000 - 0000000020200000 (reserved)
BIOS-e820: 0000000020200000 - 0000000040000000 (usable)
BIOS-e820: 0000000040000000 - 0000000040200000 (reserved)
BIOS-e820: 0000000040200000 - 00000000b6d63000 (usable)
BIOS-e820: 00000000b6d63000 - 00000000b6daa000 (ACPI NVS)
BIOS-e820: 00000000b6daa000 - 00000000b6db2000 (ACPI data)
BIOS-e820: 00000000b6db2000 - 00000000b6dc5000 (reserved)
BIOS-e820: 00000000b6dc5000 - 00000000b6dc6000 (ACPI NVS)
BIOS-e820: 00000000b6dc6000 - 00000000b6dd7000 (reserved)
BIOS-e820: 00000000b6dd7000 - 00000000b6dda000 (ACPI NVS)
BIOS-e820: 00000000b6dda000 - 00000000b6dfa000 (reserved)
BIOS-e820: 00000000b6dfa000 - 00000000b6dfc000 (usable)
BIOS-e820: 00000000b6dfc000 - 00000000b6e0d000 (reserved)
BIOS-e820: 00000000b6e0d000 - 00000000b6e1a000 (ACPI NVS)
BIOS-e820: 00000000b6e1a000 - 00000000b6e40000 (reserved)
BIOS-e820: 00000000b6e40000 - 00000000b6e83000 (ACPI NVS)
BIOS-e820: 00000000b6e83000 - 00000000b7000000 (usable)
BIOS-e820: 00000000b7800000 - 00000000bfa00000 (reserved)
BIOS-e820: 00000000fed1c000 - 00000000fed40000 (reserved)
BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved)
BIOS-e820: 0000000100000000 - 000000013fe00000 (usable)
Warning only 4GB will be used.
Use a PAE enabled kernel.
3200MB HIGHMEM available. 这个设备我只插了一根2G内存。
896MB LOWMEM available.
found SMP MP-table at 000fcf00
Zone PFN ranges:
DMA 0 -> 4096
Normal 4096 -> 229376
HighMem 229376 -> 1048576
early_node_map[1] active PFN ranges
0: 0 -> 1048576
DMI 2.7 present.
Intel MultiProcessor Specification v1.4
而使用同样的这个系统,同样的kernel,在G41核心中运行正常,读取内存正常:详细如下:
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 000000007dda0000 (usable)
BIOS-e820: 000000007dda0000 - 000000007ddae000 (ACPI data)
BIOS-e820: 000000007ddae000 - 000000007ddf0000 (ACPI NVS)
BIOS-e820: 000000007ddf0000 - 0000000080000000 (reserved)
BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
BIOS-e820: 00000000ffe00000 - 0000000100000000 (reserved)
1117MB HIGHMEM available.
896MB LOWMEM available. 同样是2G内存一根。
found SMP MP-table at 000ff780
Zone PFN ranges:
DMA 0 -> 4096
Normal 4096 -> 229376
HighMem 229376 -> 515488
early_node_map[1] active PFN ranges
0: 0 -> 515488
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