search for: xen_best_practices

...ocation to 512MB but allow it to balloon up as far as 1GB use `dom0_mem=512M,max:1G` +If you use this option then it is highly recommended that you disable +any dom0 autoballooning feature present in your toolstack. See the +_xl.conf(5)_ man page or [Xen Best +Practices](http://wiki.xen.org/wiki/Xen_Best_Practices#Xen_dom0_dedicated_memory_and_preventing_dom0_memory_ballooning). + ### dom0\_shadow > `= <boolean>`

Hi, I have encountered an apparently benign error on two systems where the dom0 kernel log is flooded with messages like: [52482.163855] System RAM resource [mem 0x1b8000000-0x1bfffffff] cannot be added [52482.163860] xen_balloon: reserve_additional_memory: add_memory() failed: -17 The first line is from drivers/xen/xen-balloon.c, the second from mm/memory_hotplug.c The trigger for the

Hey George, I was wondering if you could explain in simple terms how the scheduler would handle per-physical CPU when there are say 16 guests (each guest is using one VCPU), 32 physical CPUs and dom0 is not restricted to any CPUs. Would the scheduler per physical CPU schedule: guest, dom0, guest, dom0, and so on; or would it be more random? (I assume that both guest and dom0 would do a hypercall

...pervisor, which RAM area is used by dom0, which RAM area is used by each domU (PV guest domain). I hope to know the above information when xen is booted as well as when xen is running some domUs. I already know that we can dedicate a fix size of RAM to dom0 according to ( http://wiki.xen.org/wiki/Xen_Best_Practices). But it''s unclear which RAM area is allocated. I read the paravirtualised memory management on http://wiki.xen.org/wiki/X86_Paravirtualised_Memory_Management; but it only shows the virtual address range of each domain. I also looked at the xen/common/page_alloc.c; I think the function a...

Hey! I am following the steps at http://wiki.xenproject.org/wiki/XCP_Beginners_Guide for creating a VM. I''ve setup my test VM with 1GiB min/max memory. I''ve assigned 2GiB of memory to dom0 (http://wiki.xen.org/wiki/Xen_Best_Practices) . My box has 12GB of physical memory and runs Ubuntu 13.04. When I do "xe vm-start", I get the following: The server failed to handle your request, due to an internal error. The given message may give details useful for debugging the problem. message: Xenctrl.Error [ memory 10340716 Ki...