Re: why choose 896MB to the start point of ZONE_HIGHMEM

[H. Peter Anvin]

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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/