Any way to reserve but not commit memory in linux?

Question

Windows has VirtualAlloc, which allows you to reserve a contiguous region of address space, but not actually use any physical memory. Later when you want to use it (or part

Answer 1

The Linux equivalent of VirtualAlloc() is mmap(), which provides the same behaviours. However as a commenter points out, reservation of contiguous memory is the behaviour of calls to malloc() as long as the memory is not initialized (such as by calloc(), or user code).