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Sorry, I should have been clear I was specifically replying to suggestion that glibc (or any malloc, by which I mean C standard library memory manager) could mo

• chrisseaton 7y ago
  > specifically replying to suggestion that glibc (or any malloc, by which I mean C standard library memory manager) could move memory allocations But I think malloc can move memory allocations - it can move objects out of a page and return it to the kernel by copying objects into an existing page with a gap and then remapping the old addresses onto the copied page. Then the memory has moved but retains the same address and the old page is returned. See for example the Mesh allocator which does this and still manages to expose a conventional malloc interface. https://github.com/plasma-umass/Mesh https://github.com/plasma-umass/Mesh
  • CJefferson 7y ago
    OK, mesh is doing something very cool and unusual. I've never seen that before (in my defense, it is a 2019 academic paper). It still has its limits, as it can only merge allocations which don't overlap modulo 4096.