Hi all, I am trying to find out why the minimum memory allocation for a domu is 4MB. I am running MiniOS and a small application that requires no more than 8 KB or RAM. Can anyone give me a comprehensive answer to this question, i am really looking to get to grips with this in detail. Is this an arbitrary decision, or is there something more meaningful at work here? Thanks Paul _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users
On Wed, 2012-11-21 at 23:19 +0000, Paul Harvey wrote:> I am trying to find out why the minimum memory allocation for a domu > is 4MB.Are you using 32 or 64 bit minios? Please can you tell me how you are trying to start your guest and what the various logs look like. http://wiki.xen.org/wiki/Reporting_Bugs_against_Xen has a list of likely candidate logs to look in. Once I can see how it fails I''ll know where to start looking for the answer to your question (at the moment grepping for variations on "4MB" isn''t telling me much). I wonder if this might be a consequence of item 8 in the start-of-day layout: http://xenbits.xen.org/docs/unstable/hypercall/include,public,xen.h.html#incontents_startofday Ian.
On Fri, Nov 23, 2012 at 3:54 AM, Ian Campbell <Ian.Campbell@citrix.com>wrote:> On Wed, 2012-11-21 at 23:19 +0000, Paul Harvey wrote: > > I am trying to find out why the minimum memory allocation for a domu > > is 4MB. >According to the MINI-OS documentation in source: cf: <http://www.cs.uic.edu/~spopuri/minios.html> * 8. There is guaranteed to be at least 512kB padding after the final * bootstrap element. If necessary, the bootstrap virtual region is * extended by an extra 4MB to ensure this. --Andy _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users