On Wed, Jul 08, 2015 at 01:41:16PM +0200, Igor Mammedov wrote: > As additional issue: > deleting backend doesn't actually frees memory since it's > just mmap(NORESERVE) over allocated region. It's possible > to do madvise(MADV_DONTNEED) on area but it doesn't guaranty > that kernel will free memory.
munmap does not guarantee that either. > So all these mmap/remap > tricks could screw up mgmt tools if they try to limit memory > consumed by QEMU. It's likely easier to manage if virtual memory usage does not jump up and down randomly. > series is not tested wrt cross-version migration. Testing is always good but I don't see anything touching migration here. -- MST
