svn commit: r230266 - in stable/9/sys: amd64/amd64 i386/i386

[Slawa Olhovchenkov]

On Tue, Jan 17, 2012 at 01:52:05PM +0000, Gavin Atkinson wrote:

> Author: gavin
> Date: Tue Jan 17 13:52:04 2012
> New Revision: 230266
> URL: http://svn.freebsd.org/changeset/base/230266
> 
> Log:
>   Merge r229085 from head:
>   
>     Default to not performing the early-boot memory tests when we detect we
>     are booting inside a VM.  There are three reasons to disable this:
>   
>     o  It causes the VM host to believe that all the tested pages or RAM are
>        in use.  This in turn may force the host to page out pages of RAM
>        belonging to other VMs, or otherwise cause problems with fair resource
>        sharing on the VM cluster.
>     o  It adds significant time to the boot process (around 1 second/Gig in
>        testing)
>     o  It is unnecessary - the host should have already verified that the
>        memory is functional etc.
>   
>     Note that this simply changes the default when in a VM - it can still be
>     overridden using the hw.memtest.tests tunable.
>   
>   Early MFC requested by:	bz

How about similar behaviour for /boot/loader?