> Hi all,
> I would like to add the equivalent of mremap(2) from Linux for the use
> e.g. of malloc(3).
> 
> Prototype:
> 	void *mremap(void *oldp, size_t oldsize, void *newp,
> 		     size_t newsize, int flags)
> 
> Supported flags from mmap(2):
> MAP_FIXED
> MAP_ALIGNED
> 
> Semantic:
> Resize the mapped range [oldp..oldp_oldsize] to newsize. If MAP_FIXED is
> specified newp is tried and mremap fails it that can't be used.
> Otherwise oldp and newp are used as hints for the position, factoring in
> the given alignment. Return value is either the new address or
> MAP_FAILED.
> 
> Attached is an attempt to implement this.
> 
> Joerg

the implementation seems reasonable to me.

before it goes in the tree, i'd like to see an actual user of the syscall.

YAMAMOTO Takashi