Re: [RFC PATCH v2 6/7] lib/persubnode: Introducing a simple per-subnode APIs

[Tejun Heo]

Hello,

On Tue, Jul 12, 2016 at 02:51:31PM -0400, Waiman Long wrote:
> The last 2 RFC patches were created in response to Andi's comment to have
> coarser granularity than per-cpu. In this particular use case, I don't think
> global list traversals are frequent enough to really have any noticeable
> performance impact. So I don't have any benchmark number to support this
> change. However, it may not be true for other future use cases.
> 
> These 2 patches were created to gauge if using a per-subnode API for this
> use case is a good idea or not. I am perfectly happy to keep it as per-cpu
> and scrap the last 2 RFC patches. My main goal is to make this patchset more
> acceptable to be moved forward instead of staying in limbo.

I see.  I don't think it makes sense to add a whole new API for a use
case which doesn't really need it without any backing data.  It
probably would be best to revisit this when we're dealing with an
actually problematic case.

Thanks.

-- 
tejun