Re: [PATCH 1/3] radix-tree: propagate all tags in idr tree

[Christoph Hellwig]

On Tue, Jun 14, 2022 at 02:09:47PM -0400, Brian Foster wrote:
> The IDR tree has hardcoded tag propagation logic to handle the
> internal IDR_FREE tag and ignore all others. Fix up the hardcoded
> logic to support additional tags.
> 
> This is specifically to support a new internal IDR_TGID radix tree
> tag used to improve search efficiency of pids with associated
> PIDTYPE_TGID tasks within a pid namespace.

Wouldn't it make sense to switch over to an xarray here rather
then adding new features to the radix tree?