Re: [PATCH v2 2/2] mm/slab: break up RCU readers on SLAB_TYPESAFE_BY_RCU example code

Matthew Wilcox
2023-04-15T03:49:57Z

On Sat, Apr 15, 2023 at 03:31:59AM +0000, SeongJae Park wrote:
> The SLAB_TYPESAFE_BY_RCU example code snippet is having not tiny RCU
> read-side critical section. 'Documentation/RCU/rculist_nulls.rst' has
> similar example code snippet, and commit da82af04352b ("doc: Update and
> wordsmith rculist_nulls.rst") has broken it. Apply the change to
> SLAB_TYPESAFE_BY_RCU example code snippet, too.

so the page cache (eg find_get_entry()) does not follow this "split
the RCU critical section" pattern. Should it? What's the benefit?