Re: [PATCH v4 3/3] Docs/mm/damon/design: Document hugepage_mem_bp target metric

[SJ Park <sj@kernel.org>]

On Mon, 31 Aug 2026 13:00:26 -0700 Randy Dunlap <rdunlap@infradead.org> wrote:

> 
> 
> On 8/31/26 8:45 AM, Randy Dunlap wrote:
> > Hi,
> > 
> > On 8/31/26 7:47 AM, SJ Park wrote:
> >> From: Asier Gutierrez <gutierrez.asier@huawei-partners.com>
> >>
> >> Document hugepage_mem_bp metric exposed by sysfs.
> >>
> >> Signed-off-by: Asier Gutierrez <gutierrez.asier@huawei-partners.com>
> >> Reviewed-by: SJ Park <sj@kernel.org>
> >> Signed-off-by: SJ Park <sj@kernel.org>
> >> ---
> >>  Documentation/mm/damon/design.rst | 2 ++
> >>  1 file changed, 2 insertions(+)
> >>
> >> diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst
> >> index aed6cb1cf4831..a8c163475ef2b 100644
> >> --- a/Documentation/mm/damon/design.rst
> >> +++ b/Documentation/mm/damon/design.rst
> >> @@ -713,6 +713,8 @@ mechanism tries to make ``current_value`` of ``target_metric`` be same to
> >>    bp (1/10,000).
> >>  - ``node_eligible_mem_bp``: Scheme target access pattern-eligible memory ratio
> >>    of a node in bp (1/10,000).
> >> +- ``hugepage_mem_bp``: Total huge page to total used memory ratio in bp
> >> +  (1/10,000).
> >>  
> >>  ``nid`` is optionally required for ``node_mem_used_bp``, ``node_mem_free_bp``,
> >>  ``node_memcg_used_bp``, ``node_memcg_free_bp`` and ``node_eligible_mem_bp`` to
> > 
> > I've looked thru the entire design.rst file and cannot find anything telling
> > me (or anyone) what "bp" means.  Explain??
> 
> OK, I found it on the internet. I still think that it would be a
> good idea to say "basis point" one time (the first time that it is used).

You are right, and I agree.  I will add that clarification before the next
merge window.

> 
> 
> -- 
> ~Randy


Thanks,
SJ