Xen users - Feb 2006 - Simple memory allocation question

> When you specify the kernel option (dom0_mem=) for Domain0, is the RAM
> allocated to slave os''s taken from the domain0 RAM amount, or are
all
> the domains (including domain0) have their own memory partitions? 
The latter.  If you give memory to dom0 it''s not available to guests. 
The
memory you give dom0 is always there for it, so you know it can''t get
starved
etc.

EXCEPT:

recent versions of Xen have the ability to shrink dom0 after boot-time to make 
room for other guests.  In this instance, you can set a minimum memory 
threshold, below which dom0 will not shrink.

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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Hello Everyone,

    Sorry if this has been address before, but I have a question about 
the RAM usage in Xen.  What I am confused with is this:

When you specify the kernel option (dom0_mem=) for Domain0, is the RAM 
allocated to slave os''s taken from the domain0 RAM amount, or are all 
the domains (including domain0) have their own memory partitions?  The 
reason I am confused is because I have used VMWare for a long time and 
it grabs memory from the main OS to use on slave OSs.
    Thanks in advance.

Mike Lee


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