[Xen-devel] Available Memory on 4GB system

[Peter <p.spamcatcher@xxxxxxxxxxxxxxx>]

We have a dual Xeon server with 4x1GB memory sticks.  With a non-Xen 
kernel it boots up with ~4GB of memory.  With the Xen kernel it boots up 
with ~3.3GB of memory.
I know this has been discussed before, but I'm still not clear why the 
xen kernel boots up with less memory available than a regular Linux 
kernel.  Would someone mind patiently explaining it once more?
I want to make sure there is no kernel .config option we're setting 
which is making memory unavailable to us.  And from what I read the pae 
changes in 3.0 should allow us to see more (all?) of the memory.
(BTW we are now offering Xen based VPS hosting - having been running UML 
based servers up to now.  We find the 2.0.6 setup performs well, and the 
VPSs have been very stable.  Other than the minor gripe about the 
memory, we have been very happy with the software.  Thanks for 
everyone's work on this.)
Regards, Peter
http://rimuhosting.com


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel