Help里可以看到:
[code:1]1Gb Low Memory Support ────────────────────────────────────┐
│ CONFIG_1GLOWMEM: │
│ │
│ Linux on i386 architecture normally supports just under 900Mb without │
│ enabling HIGHMEM support. This option will enable you to support 1Gb │
│ of ram without needing to enable HIGHMEM support. The advantage of │
│ this is that you don't need the extra overhead of high memory support │
│ to utilise the last 100Mb of ram. However this may break drivers such │
│ as vmware. │
│[/code:1]
至于Kernel internal timer frequency,好象是指timer interrupt frequency,选的时候应该和你的cpu的hz相对应,一般选1000就可以了。如果你的机子很差,只有500-1000Mhz,可以选500,如果连500Mhz都不到则选200,等等。