similar to: Memory Of...

Hello, I have installed XCP in Debian following the steps depicted in http://wiki.xen.org/wiki/XCP_toolstack_on_a_Debian-based_distribution . Out of the box, dom0 takes hold of all the available memory, so I cannot start any domU (I''m using XenCenter). If I try to limit the dom0 memory using kernel parameter dom0_mem, it is apparently ignored. Info: # cat /proc/cmdline placeholder

Radhakrishnan, Prashanth wrote: > Hi, > > I wanted to know if the following would work: > - memory-hotplug on x86_64 domUs > - memory-hotplug + ballooning interplay (e.g. > http://lkml.org/lkml/2008/4/3/449), again on x86_64 domUs > > For starts, if I read the Xen linux src (at > http://xenbits.xensource.com/linux-2.6.18-xen.hg) right, it says that > SPARSEMEM cannot

My Dom0 just locked up when creating a DomU, and I suspect that it''s because xen was out of memory. Last time I checked, xm info told me I had around 100mb free, and I just tried to create a DomU with 1GB of memory. I''m probably a couple of patches behind the latest rc, but can someone test to see if it does the right or wrong thing for them? Thanks James

Preamble: dom0: Xen 3.0.4 running on Ubuntu 6.06 x86_64. domU: Xen 3.0.4 or 3.1.0 kernel booting from host pygrub. File backed. ------------- I am having this strange problem getting pygrub to load consistently. When I start a domU, I sometimes get this. Error: Boot loader didn''t return any data! ... and nothing else. When I look in the xend-debug.log log, I see this.

Since TRC_MEM is defined as 0x000af000 in xen/include/public/trace.h, TRC_MEM = TRC_SCHED | TRC_VMX. I feel strange about this. I do not think scheduling is a part of memory management. Am I right? If not, please tell me the background TRC_MEM is defined as TRC_SCHED | TRC_VMX. If so, please apply this patch. This patch defines TRC_MEM as an independent event mask. In addition, xentrace

is_local_lowmem() treats its physical address input as a machine address; this causes agpgart to fail while calling ioremap_nocache(). X still does not load on my Athlon 64 / Via S3 Unichrome, so perhaps best not to apply just yet. Signed-off-by: Avi Kivity <avi@qumranet.com> --- xen-ioremap-fix/linux-2.6-xen-sparse/arch/i386/mm/ioremap-xen.c~ioremap 2006-06-22 20:30:20.000000000 +0300

Hello, We are looking to use Xen as our hypervisor. However, after doing some research it''s still not clear as to the amount of memory Xen 64bit can support? The highest I''ve found is 4TB of physical memory. For the host VM''s, I''ve found several statements that indicated that the max per VM was 32GB. Are these numbers accurate? And can these limits be removed

I''m trying to configure GRUB to allocate fixed amount of dedicated memory to dom0, according to this best practices thread (http://wiki.xensource.com/xenwiki/XenBestPractices | "Xen dom0 dedicated memory and preventing dom0 memory ballooning "). When I reboot, dom0 has the fixed amount of memory as it was configured, but neither xm info shows the rest of memory available

hi, How can the memory as well as cpu usage of guestOS be monitored through Xen? If the ''top'' is invoked from hostOS it just shows some usage under process named ''python''. Basic aim is if there are 5 guestOS running on a hostOS and if one of the guestOS hogs the CPU and it is needed to migrate that guestOS to some other hostOS.

Hi, I have a machine with 1G RAM, running Xen 3.0.1, and Linux. I want to create two domU VMs and move ALL the memory, flexibly, back and forth between the two VMs. To do this, I created two domU VMs running Linux, both with kernel boot parameters mem=1G, to tell Linux to prepare memory tables for 1G RAM. I booted the VMs, with xm parameter ''memory=256'', i.e. telling Xen

This is probably a really stupid question, but what happens if you have more memory allocated to domU''s than your physical RAM? Will that cause dom0 to crash? DomU''s to crash? Or just slow performance due to swap use on dom0? I ask this because we''ve got high availability clusters running domU''s, and I want to know how much memory is safe to allocate to

Hi This is a general question has anyone got Xen 3 to work with more than 4GIG of memory installed on there physical machine? I have tried 2 different machines with more than 4 GIG of memory with no success as yet. I can get Xen0 booting no problem, i run service xend start with no problem, i then run xm info and it sees more than 4 gig of memory available. Fantastic up to this point. After

That change converted the (wrong) assumption of contiguous nodes'' memory to a similarly wrong one of assuming discontiguous memory (i.e. each node having separate E820 table entries). The code ought to be able to deal with both, though, and I hope this change makes it so. Signed-off-by: Jan Beulich <jbeulich@novell.com> --- 2009-08-24.orig/xen/arch/x86/srat.c 2009-08-28

Thank you. I notice the system then jumps to F000:FFF0 to execute. But because VMX is turned on, switching to real-mode would incur problems? I don’t find any clue to turn on the vm86 mode as Readme in the tools/firmware directory puts. Best regards, Hu Jia Yi Ext: 20430 Tel: 65-67510430 -----Original Message----- From: Cui, Dexuan [mailto:dexuan.cui@intel.com] Sent: Thursday,

We currently compare the sum of the pages found in the SRAT table to the address of the highest memory page found via the e820 table to validate the SRAT. This is completely bogus if there''s any kind of discontiguous memory, where the sum of the pages could be much smaller than the address of the highest page. I think all that''s necessary is to validate that each usable memory

I think I may have fixed my memory leaks, and it may be that it was nothing to do with xen... the machine has been up for 10 days now which is the longest it has lasted in quite a while. I changed the way the bridges and vlans worked together, previously I had it configured thus: trunk = renamed Ethernet interface br0 = bridge of trunk and any domU I wanted on vlan1 br0.2 = vlan 2 on trunk br1 =

Hello everyone... I get the following error when i try to creat a virtual machine Error: (4, ''Out of memory'', "xc_dom_boot_mem_init: can''t allocate low memory for domain\n") I''m using Xen under Gentoo, kernel 2.6.32-r1 in a i686 Dual Core AMD Opteron(tm) Processor 290 AuthenticAMD with 16Gb of memory and 4Tb of hard disk. It was a pain to install

Does Xen allow something like "memory hotplug" for its guests? For example, lets says you are running several guests, and would like to start yet another one for a while - but have no free memory left. So you simply "hotplug remove" memory from a guest that has a lot of free memory left - and start a new guest. When that new guest is no longer needed, and is stopped, you

Hi, I just want to know if it is possible to use grant table to create shared memory between HVM domU. I tried in Xen 4.1.1 with Linux kernel 3.1.1. It seems that I cannot create it. Cannot we do that between HVM domU now? _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

I''m currently using the xen-3.0-testing.hg version with the XEN_TARGET_X86_PAE=y complied dom0/hypervisor. I have an HP dl585 with 28GB but the hypervisor boots and says "(XEN) WARNING: Only the first 16 GB of the physical memory map can be accessed...". Xentop shows 16GB. When I boot a RHEL4 2.6.9 hugemem kernel, I can see all 28GB. Any suggestions? Toby