linux-kernel - Re: [PATCH v2 0/6] lib: Extend bitmap find binary operations

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Message-ID: <ZtHrl_1DEku-VeQV@yury-ThinkPad>
Date: Fri, 30 Aug 2024 08:56:07 -0700
From: Yury Norov <yury.norov@...il.com>
To: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Rasmus Villemoes <linux@...musvillemoes.dk>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/6] lib: Extend bitmap find binary operations

On Thu, Aug 29, 2024 at 09:59:20AM -0400, Mathieu Desnoyers wrote:
> Extend bitmap find.h and cpumask.h with additional binary operations
> such as "nor".
> 
> Also extend the testing and benchmark coverage of those bitmap find with
> binary operations.
> 
> This is useful for NUMA-aware rseq concurrency IDs which depend on this
> series.
 
Hi Mathieu,

Thanks for the series! I appreciate your time nailing it down, and
especially the tests provided. A couple nits is that we don't need
an 'extern' specifier,  and would better avoid local statics, even
in tests.

I'll fix that inplace and apply in bitmap-for-next. Can you share
a link for your work that requires the new API? I need to point it
when sending a merge request.

Thanks,
Yury
 
> Mathieu Desnoyers (6):
>   lib: Clarify comment on top of find_next_andnot_bit
>   lib: Implement find_{first,next,nth}_nor_bit, for_each_nor_bit,
>     find_first_andnot_bit
>   lib: test bitmap sets binary operation iterators
>   lib: Fix test_find_first_and_bit and test_find_next_and_bit benchmark
>   lib: benchmark bitmap sets binary operation find
>   cpumask: Implement cpumask_{first,next}_{nor,andnot}
> 
>  include/linux/cpumask.h  |  60 +++++++++++++++++++
>  include/linux/find.h     | 124 +++++++++++++++++++++++++++++++++++++--
>  lib/find_bit.c           |  36 ++++++++++++
>  lib/find_bit_benchmark.c | 103 ++++++++++++++++++++++++++++++--
>  lib/test_bitmap.c        |  81 +++++++++++++++++++++++++
>  5 files changed, 396 insertions(+), 8 deletions(-)
> 
> -- 
> 2.39.2