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

You can turn this functionality on system-wide by using kernel overcommit. This is usually default setting on many distributions.

Here is the explanation http://www.mjmwired.net/kernel/Documentation/vm/overcommit-accounting