Re: [PATCH v9 10/17] refcount: introduce __refcount_{add|inc}_not_zero_limited

To: David Laight <david.laight.linux@xxxxxxxxx>
Subject: Re: [PATCH v9 10/17] refcount: introduce __refcount_{add|inc}_not_zero_limited
From: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Date: Sat, 11 Jan 2025 17:07:55 +0000
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>, akpm@xxxxxxxxxxxxxxxxxxxx, peterz@xxxxxxxxxxxxx, liam.howlett@xxxxxxxxxx, lorenzo.stoakes@xxxxxxxxxx, mhocko@xxxxxxxx, vbabka@xxxxxxx, hannes@xxxxxxxxxxx, mjguzik@xxxxxxxxx, oliver.sang@xxxxxxxxx, mgorman@xxxxxxxxxxxxxxxxxxx, david@xxxxxxxxxx, peterx@xxxxxxxxxx, oleg@xxxxxxxxxx, dave@xxxxxxxxxxxx, paulmck@xxxxxxxxxx, brauner@xxxxxxxxxx, dhowells@xxxxxxxxxx, hdanton@xxxxxxxx, hughd@xxxxxxxxxx, lokeshgidra@xxxxxxxxxx, minchan@xxxxxxxxxx, jannh@xxxxxxxxxx, shakeel.butt@xxxxxxxxx, souravpanda@xxxxxxxxxx, pasha.tatashin@xxxxxxxxxx, klarasmodin@xxxxxxxxx, richard.weiyang@xxxxxxxxx, corbet@xxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, kernel-team@xxxxxxxxxxx
In-reply-to: <20250111123900.643e4b49@pumpkin>
References: <20250111042604.3230628-1-surenb@google.com> <20250111042604.3230628-11-surenb@google.com> <20250111123900.643e4b49@pumpkin>

On Sat, Jan 11, 2025 at 12:39:00PM +0000, David Laight wrote:
> I don't think the kernel compiles disable this optimisation.

You're wrong.

References:
- [PATCH v9 00/17] reimplement per-vma lock as a refcount
  - From: Suren Baghdasaryan
- [PATCH v9 10/17] refcount: introduce __refcount_{add|inc}_not_zero_limited
  - From: Suren Baghdasaryan
- Re: [PATCH v9 10/17] refcount: introduce __refcount_{add|inc}_not_zero_limited
  - From: David Laight