linux-kernel - Re: [PATCH bpf-next 1/2] bpf: Add bpf_cpumask

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Message-ID: <39853044-6139-41ab-87b4-0d9972722226@linux.dev>
Date:   Thu, 7 Dec 2023 20:37:40 -0800
From:   Yonghong Song <yonghong.song@...ux.dev>
To:     David Vernet <void@...ifault.com>, bpf@...r.kernel.org
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        martin.lau@...ux.dev, song@...nel.org, john.fastabend@...il.com,
        kpsingh@...nel.org, sdf@...gle.com, haoluo@...gle.com,
        jolsa@...nel.org, linux-kernel@...r.kernel.org,
        kernel-team@...a.com
Subject: Re: [PATCH bpf-next 1/2] bpf: Add bpf_cpumask_weight() kfunc


On 12/7/23 1:08 PM, David Vernet wrote:
> It can be useful to query how many bits are set in a cpumask. For
> example, if you want to perform special logic for the last remaining
> core that's set in a mask. Let's therefore add a new
> bpf_cpumask_weight() kfunc which checks how many bits are set in a mask.
>
> Signed-off-by: David Vernet <void@...ifault.com>

Acked-by: Yonghong Song <yonghong.song@...ux.dev>