This means that the system does not even try to unfragment the memory in order to get a 2MB contiguous block. Hmm.. I think the system was under high memory pressure at the time and perhaps it was unable to do so. There are 32 GB of RAM, but there was an opened browser window with a lot of tabs opened, a VM with 8 GiB allocated to it was running, and I was also decompressing an archive, which was using %Temp%; that's when the message was displayed. If the system does not try to move anything, this...
Possible mistake when large pages are used, ullAvailPageFile?