On Wed, May 23, 2018 at 05:34:01AM -0700, Matthew Wilcox wrote:

On Tue, May 22, 2018 at 09:18:19PM -0400, Kent Overstreet wrote:

quoted

the new generic radix trees have a simpler API and implementation, and
no limitations on number of elements, so all flex_array users are being
converted

This doesn't really feel like it should be a flexarray / genradix user.
It just wants to allocate a lot of buckets and use them.  Maybe kvmalloc
is the right approach for this user of flexarray?

Yeah probably, or a rhashtable.

Now that you mention it, I think the md code should definitely be using kvmalloc
too.