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Subjectno highmem with 2GB RAM?
I have a couple of SMP i386 boxes with 2GB RAM. They suffer from poor
performance due to block IO page bouncing with highmem enabled. I have
tried the block-highmem patch but this causes occasional oopses and even
panics under high IO load.

Will there be any ill effects if I change __PAGE_OFFSET to 0x7000000 or
thereabouts so that all RAM is mapped?

I presume I only have to change this is page.h and vmlinux.lds.S as in 2.2
kernels.

--
Alistair Riddell - BOFH
IT Manager, George Watson's College, Edinburgh
Tel: +44 131 446 6070 Fax: +44 131 452 8594
Microsoft - because god hates us


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