Re: realloc function

> I am submitting a patch for a realloc function that might be useful. The
> proposed numa_realloc() is merely a wrapper to mremap(), which it calls
> with the flag MREMAP_MAYMOVE. The policy of the vm area is copied by the
> kernel in case of moving. I am also submitting a test program, that
> keeps expanding an initial allocation until a limit is reached and
> checks the mempolicy of the expanded area in every iteration.
>
> My use case is a dynamic array implementation which uses realloc() to
> dynamically expand the array and I want to convert it to a numa-aware
> implementation.

You need to call numa_police_memory_int() in the function, otherwise
the policy won't be actually preserved.

-Andi