On 04/02/2015 14:52, Michael S. Tsirkin wrote: > I'm not sure: does memory core ever give us two adjacent > RAM segments that we *can* merge?
I don't think so. Memory core merges ranges already if the following holds: - same memory region - same dirty logging mode - same readonly behavior (ignore reads, trap reads as MMIO, read/write) - r2 end address is the same as r1 start address - r2's offset in the memory region is equal to r1's plus the size of r1 Paolo > If yes it would trigger, and extra memory slots slow down lookups > linearly so they aren't free.
