Re: HIGHMEM4G config for 1GB RAM on desktop?

[Prakash K. Cheemplavam]

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Jens Axboe wrote:
| On Mon, Aug 02 2004, Barry K. Nathan wrote:
|
|>On Mon, Aug 02, 2004 at 04:02:34PM -0500, Steve Snyder wrote:
|>
|>>There seems to be a controversy about the use of the CONFIG_HIGHMEM4G
|>>kernel configuration.  After reading many posts on the subject, I still
|>>don't know which setting is best for me.
|>
|>On my own desktop system with 1GB RAM, any highmem slowdown seems to be
|>outweighed by the fact that more disk data stays cached in RAM (so I hit
|>the disk much less often).
|
|
| There's also the option of moving the mapping only slightly, so that all
| of the 1G fits in low memory. That's the best option for 1G desktop
| machines, imho. Changing PAGE_OFFSET from 0xc0000000 to 0xb0000000 would
| probably be enough.
|
| Then you can have your cake and eat it too.

This works nicely for me. I wonder why this doesn't become standard
behaviour in kernel. At least a lot of people would be happy about it.

Prakash
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