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SubjectRe: [PATCH v2] blkdev: Replace blksize_bits() with ilog2()
On Tue, Jun 02, 2020 at 07:51:52AM +0200, Christoph Hellwig wrote:
> On Mon, Jun 01, 2020 at 10:44:26AM +0200, Greg KH wrote:
> > But does this code path actually show up anywhere that is actually
> > measurable as mattering?
> >
> > If so, please show that benchmark results.
> I think the requests are starting to be a bit unreasonable. Tao is
> replacing a reimplementation of a standard function with that standard
> function / compiler builtin. We don't put such a high burden on that.

That's fine, but to say it is "faster" usually means we want to see it
actually going faster somehow :)

> And once the proper existing fields are used where possible as shown
> in my reply just replacing the rest seems totally obvious - quite
> contrary I think keeping a reimplementation would need a high bar.

Your patch makes sense, I was not objecting to that.


greg k-h

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