Messages in this thread | | | Date | Tue, 06 Apr 2010 13:18:51 -0700 | From | "H. Peter Anvin" <> | Subject | Re: why choose 896MB to the start point of ZONE_HIGHMEM |
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On 04/06/2010 01:15 PM, Frank Hu wrote: > > 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. > > I am not a guru in this space... so I might be wrong.
And you are. The vmalloc zone (not DMA zone -- that's something entirely different) is configurable via the vmalloc= kernel command line option.
-hpa
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