Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: Questions about duplicate memory work
On 09/29/2011 09:46 PM, Robin Lee Powell wrote: On Thu, Sep 29, 2011 at 02:22:43PM -0300, Marcelo Tosatti wrote: On Wed, Sep 28, 2011 at 05:14:47PM -0700, Robin Lee Powell wrote: Please post the contents of /proc/meminfo and /proc/zoneinfo when this is happening. I just noticed that the amount of RAM the VMs had in VIRT added up to considerably more than the host's actual RAM; hard_limit is now on. So I may not be able to replicate this. :) Or not; even with hard_limit the VIRT value goes to hundreds of MiB more than the limit. Is that expected? Yes, VIRT field refers to total memory mapped by the process, not paged-in memory, which is indicated by the RES field. Yes, I'm aware of that; that isn't relevant to my question. I would expect the *total* memory requested by a VM to never go over the hard_limit value set in the XML file. I mean, isn't that what the hard_limit *means*? If not, what does it mean? VIRT memory includes both guest memory, and memory reserved (usually not used) by qemu. Don't read too much into it. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: Questions about duplicate memory work
On Thu, Sep 29, 2011 at 02:22:43PM -0300, Marcelo Tosatti wrote: On Wed, Sep 28, 2011 at 05:14:47PM -0700, Robin Lee Powell wrote: Please post the contents of /proc/meminfo and /proc/zoneinfo when this is happening. I just noticed that the amount of RAM the VMs had in VIRT added up to considerably more than the host's actual RAM; hard_limit is now on. So I may not be able to replicate this. :) Or not; even with hard_limit the VIRT value goes to hundreds of MiB more than the limit. Is that expected? Yes, VIRT field refers to total memory mapped by the process, not paged-in memory, which is indicated by the RES field. Yes, I'm aware of that; that isn't relevant to my question. I would expect the *total* memory requested by a VM to never go over the hard_limit value set in the XML file. I mean, isn't that what the hard_limit *means*? If not, what does it mean? That's certainly what http://libvirt.org/formatdomain.html#elementsMemoryTuning *implies*, anyways. -Robin -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
