On 15/6/22 19:12, Christoph Hellwig wrote:
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?
Might be a dumb question but ...
How would the, essentially sparse, pid type PIDTYPE_TGID pids
traversal get benefits from an xarray?
From what I have seen the searching isn't the real problem, it's the
traversal (that, at the moment, does a search 'and' a traversal over
a lot of pids to get a relatively small number of them).
Ian
