Re: [PATCH v2 0/5] Move kvfree_rcu() into SLAB (v2)

[Joel Fernandes]

On Wed, Jan 22, 2025 at 11:43 AM Vlastimil Babka <vbabka@xxxxxxx> wrote:
[...]
> > __is_kvfree_rcu_offset() and its usage from Tiny. Granted, there is
> > the overhead of function calling, but I highly doubt that it is going
> > to be a bottleneck, considering that the __is_kvfree_rcu_offset() path
> > is a kfree slow-path.  I feel in the long run, this will also be more
> > maintainable.
> >
> > Or is there a reason other than the theoretical function call overhead
> > why this may not work?
>
> My concern was about the overhead of calculating the pointer to the object
> starting address, but it's just some arithmetics, so it should be
> negligible. So I'm prototyping this approach now. Thanks all.

Ah, that's a valid point. Looking forward to reviewing the patch and
hope it works out!

thanks,

 - Joel