svn commit: r221855 - in head/sys: amd64/include arm/include dev/md dev/null i386/include ia64/include mips/include powerpc/include sparc64/include sun4v/include sys vm

[Kostik Belousov]

On Fri, May 13, 2011 at 07:35:01PM +0000, Matthew D Fleming wrote:
> Author: mdf
> Date: Fri May 13 19:35:01 2011
> New Revision: 221855
> URL: http://svn.freebsd.org/changeset/base/221855
> 
> Log:
>   Move the ZERO_REGION_SIZE to a machine-dependent file, as on many
>   architectures (i386, for example) the virtual memory space may be
>   constrained enough that 2MB is a large chunk.  Use 64K for arches
>   other than amd64 and ia64, with special handling for sparc64 due to
>   differing hardware.
>   
>   Also commit the comment changes to kmem_init_zero_region() that I
>   missed due to not saving the file.  (Darn the unfamiliar development
>   environment).
>   
>   Arch maintainers, please feel free to adjust ZERO_REGION_SIZE as you
>   see fit.
>   
>   Requested by:	alc
>   MFC after:	1 week
>   MFC with:	r221853
Wasting 2MB even on amd64 is not quite good, IMHO.
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