Messages in this thread | | | From | Krzysztof Halasa <> | Subject | Re: why choose 896MB to the start point of ZONE_HIGHMEM | Date | Wed, 07 Apr 2010 14:16:27 +0200 |
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Frank Hu <frank.hu.2001@gmail.com> writes:
> thought that you can only configure how to split the VM like 1G/3G or > 2G/2G. But the DMA zone size, the 128MB space for I/O is not > configurable. The NORMAL zone size will be deducted based on the VM > Split and some hard coded DMA zone and 128 MB space size.
Only the DMA zone size if fixed - a hardware property of PC/AT-style DMA controllers and ISA bus. -- Krzysztof Halasa
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