<br><font size=2><tt>Jeff Scheel <scheel@vnet.ibm.com> wrote on 08/09/2005
01:42:42 AM:<br>
> On Mon, 2005-08-01 at 05:53, David Gibson wrote:<br>
> > Comments in head.S suggest that the iSeries naca has a fixed
address,<br>
> > because tools expect to find it there. The only tool which
appears to<br>
> > access the naca is addRamDisk, but both the in-kernel version
and the<br>
> > version used in RHEL and SuSE in fact locate the NACA the same
way as<br>
> > the hypervisor does, by following the pointer in the hvReleaseData<br>
> > structure.<br>
> > <br>
> > Since the requirement for a fixed address seems to be obsolete,
this<br>
> > patch removes the naca from head.S and replaces it with a normal
C<br>
> > initializer.<br>
> There are IBM internal debug tools built into the iSeries which depend
<br>
> on this address. Removing it will break them.<br>
> <br>
> You should really get input from Mike Ranweiler as to the impact of
this<br>
> change. Dave Boutcher might also have insight.<br>
> -Jeff<br>
<br>
I was asked before this patch was sent.. No one that I am aware of
</tt></font>
<br><font size=2><tt>has used these tools in a couple of years.</tt></font>
<br>
<br><font size=2 face="sans-serif">Dave Boutcher<br>
IBM Linux Technology Center</font>