On Mon, Aug 9, 2010 at 9:41 PM, Stefan Hajnoczi <stefa...@gmail.com> wrote: > On Mon, Aug 9, 2010 at 7:49 PM, Dennis <den...@satanclaus.com> wrote: >> I have an application that takes up over 2 GB of memory but is >> otherwise demanding virtually no other resources at all. >> Running multiple instances of the application using physical memory >> isn't an option. Would it be hard to change Qemu's >> physical memory mapping to a file on disk ? (Not Qemu-KVM, just stock Qemu). > > It's not 100% clear what you are trying to do, but are you aware that > guest "physical" memory can be swapped on the host?
I know, but the host machine would have to run out of memory before it swaps. That's not very desirable ;-) > Also, have you looked at Kernel Samepage Merging (KSM)? KSM detects > guest physical pages that contain the same contents and merge them > into a single page, saving memory. This is appropriate if you run > multiple VMs based off the same disk image and expect they will be > executing the same code. For more info, see > http://kernelnewbies.org/Linux_2_6_32#head-d3f32e41df508090810388a57efce73f52660ccb. I havn't yet. One "problem" is I _have_ to run Qemu on FreeBSD. I doubt it's possible.
