Re: [PATCH v2 1/8] lib/find_bit.c: Add find_last_zero_bit

[Yun Levi]

> btrfs' free space cache v1 is going to be removed some time in the
> future so introducing kernel-wide change just for its own sake is a bit
> premature

But, I think it's not quite a kernel-wide change just add the
correspondent function to find_last_bit.
So, if we add this feature, maybe some users will use it in near future.
As my fault, I sent this patch without cover in patch [0/8] to explain why
So, I will send this patch again to take some review...

Sorry to make a noise again and Thanks to advice.

On Sun, Dec 6, 2020 at 6:01 PM Nikolay Borisov <nborisov@xxxxxxxx> wrote:
>
>
>
> On 6.12.20 г. 10:56 ч., Yun Levi wrote:
> >> This, and the change above this, are not related to this patch so you
> >> might not want to include them.
> >
> >> Also, why is this patch series even needed?  I don't see a justification
> >> for it anywhere, only "what" this patch is, not "why".
> >
> > I think the find_last_zero_bit will help to improve in
> > 7th patch's change and It can be used in the future.
> > But if my thinking is bad.. Please let me know..
> >
> > Thanks.
> > Levi.
> >
>
> btrfs' free space cache v1 is going to be removed some time in the
> future so introducing kernel-wide change just for its own sake is a bit
> premature. Also do you have measurements showing it indeed improves
> performances?