Hi, On 4/22/19 1:10 AM, Elliott Mitchell wrote: > Refering to this as "balloon-leak" as it looks sort of like a > memory-leak, but is instead memory disappearing into the balloon.
I haven't heard about this symptom before your report. > There are two things which have been happening more recently which may > have exaggerated this problem. First, one of the DomUs is acting as a > fileserver and that has been getting more usage recently. Second, I've > been testing block-device hotplug as a mechanism to transfer data between > VMs (xl block-detach from one VM, then xl block-attach to another VM). Did you look at the numbers and see if it happens when you do this? > The DomUs appear absolutely uneffected by this. Even as Dom0 has gotten > to a situation where `shutdown -r now` fails, the DomUs appear to be > chugging away with no problems. > > There is plenty of free memory for creating additional VMs (perhaps too > much, and that confused Xen?), so this is really puzzling that memory is > being ballooned away from Dom0. At this point I plan after the next > restart to double the allocation for Dom0 and see whether Dom0 is able > to last more than a week. Weird. Can you log memory stats over time, so that you can see when it happens, and correlate it to other events? Hans
