Re: [PATCH RFC v2 06/19] Add a vmalloc_node_user function

[Kent Overstreet <kent.overstreet@linux.dev>]

On Fri, May 31, 2024 at 06:56:01AM -0700, Christoph Hellwig wrote:
> >  void *vmalloc_user(unsigned long size)
> >  {
> > -	return __vmalloc_node_range(size, SHMLBA,  VMALLOC_START, VMALLOC_END,
> > -				    GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL,
> > -				    VM_USERMAP, NUMA_NO_NODE,
> > -				    __builtin_return_address(0));
> > +	return _vmalloc_node_user(size, NUMA_NO_NODE);
> 
> But I suspect simply adding a gfp_t argument to vmalloc_node might be
> a much easier to use interface here, even if it would need a sanity
> check to only allow for actually useful to vmalloc flags.

vmalloc doesn't properly support gfp flags due to page table allocation