On 2/20/08, Tim Verhoeven tim.verhoeven.be@gmail.com wrote:
I did not see the problems you are having but I have a set of Xen hosts and by default I limit the memory usage of the dom0 to 512MB using the dom0_mem option that you mentioned. In my case the dom0's are not doing anything so why do they need the memory in the first place ? That is why I've limited my dom0's like this by default, I consider this a good practice for these kinds of setups
I can only agree. Except for a desktop setup dom0 should do nothing except acting as an administrative domain. Besides the potential memory issues that were mentioned, it gives increased security. If a dom0 is compromised, all other domains are also tainted. On my machines dom0s get fairly little memory and doesn't run much besides a heavily protected SSH daemon.
-- Daniel