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Date: Thu, 7 Dec 2023 20:37:40 -0800
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Subject: Re: [PATCH bpf-next 1/2] bpf: Add bpf_cpumask_weight() kfunc
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To: David Vernet <void@manifault.com>, bpf@vger.kernel.org
Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
 martin.lau@linux.dev, song@kernel.org, john.fastabend@gmail.com,
 kpsingh@kernel.org, sdf@google.com, haoluo@google.com, jolsa@kernel.org,
 linux-kernel@vger.kernel.org, kernel-team@meta.com
References: <20231207210843.168466-1-void@manifault.com>
 <20231207210843.168466-2-void@manifault.com>
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From: Yonghong Song <yonghong.song@linux.dev>
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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@manifault.com>

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