no highmem with 2GB RAM?

From: Alistair Riddell (ali@gwc.org.uk)
Date: Fri Jan 04 2002 - 23:00:57 EST

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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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