Re: [PATCH 01/28] hazptr: Implement Hazard Pointers

[Bradley Morgan]

On 19 September 2026 17:30:26 BST, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>On Fri, 18 Sept 2026 at 17:01, Paul E. McKenney <paulmck@xxxxxxxxxx>
>wrote:
>>
>> Its main benefit over RCU is that it allows fast reclaim of
>> HP-protected pointers without needing to wait for a grace period.
>
>So last time I looked at this was some time ago, but the thing I was
>missing then seems to still be missing: actual real numbers.
>
>And no, I most *definitely* do not mean the pointless "do this in a tight
>loop".
>
>That's just garbage. Honestly, when I see those numbers it just makes
>me go "I don't want to merge things that even mention this kind of
>stupid load". It's worse than irrelevant - it's an actively
>misleading.
>
>So I want to see a real load where this is actually visible not a
>"loop a billion times on a hot-cache thing that doesn't do anything".

I wanna be a fanboy so bad here but I need to breathe and say something
technical 

I think hazard pointers are good, what test do YOU suggest we do here?

Once I get that PowerPC grant I'm happy to run it.

God I wanted to be a fanboy and say omg Linus hi, but I'm sure I'll be
flamed, sigh. Sigh.

>
>               Linus
>

--- Thanks!
"I'm not a very positive person" - Linus torvalds