> > The only way to handle this rebustly is to pre-allocate all the memory > > we're ever going to need[1]. I don't see that happening. > > FWIW, users can already opt-in to pre-allocation if running KVM enabled > QEMU > > -mem-path /dev/shm -mem-prealloc (or /dev/hugepages more usefully)
No, that's something different. -mem-prealloc causes MAP_POPULATE to be passed when allocating guest ram, working around the fact that most modern implementations of mmap lie. It has no effect on how all the other memory qemu uses is allocated. Paul
