From: David Ahern
Date: Fri, 7 Dec 2018 12:24:57 -0800
> From: David Ahern
>
> The existing garbage collection algorithm has a number of problems:
...
> This patch addresses these problems as follows:
>
> 1. Use of a separate list_head to track entries that can be garbage
>collected
From: David Ahern
The existing garbage collection algorithm has a number of problems:
1. The gc algorithm will not evict PERMANENT entries as those entries
are managed by userspace, yet the existing algorithm walks the entire
hash table which means it always considers PERMANENT entries
