Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <cf4fdb30-6f2e-ca3e-fbc0-b48f6949508d@gmail.com>
Date:   Sat, 15 Apr 2023 09:24:28 +0700
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.10.0
Subject: Re: [PATCH v2.1 2/2] x86/Documentation: Add documentation about
 cluster
To:     K Prateek Nayak <kprateek.nayak@amd.com>,
        linux-kernel@vger.kernel.org
Cc:     tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
        dave.hansen@linux.intel.com, hpa@zytor.com, corbet@lwn.net,
        jgross@suse.com, andrew.cooper3@citrix.com, peterz@infradead.org,
        Jason@zx2c4.com, thomas.lendacky@amd.com, puwen@hygon.cn,
        x86@kernel.org, linux-doc@vger.kernel.org, oleksandr@natalenko.name
References: <20230413172918.1500-3-kprateek.nayak@amd.com>
 <20230414031743.875-1-kprateek.nayak@amd.com>
Content-Language: en-US
From:   Bagas Sanjaya <bagasdotme@gmail.com>
In-Reply-To: <20230414031743.875-1-kprateek.nayak@amd.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 4/14/23 10:17, K Prateek Nayak wrote:
> +  - cluster_id:
> +
> +    A per-CPU variable containing:
> +
> +      - Upper bits extracted from the APIC ID.  CPUs which have the same value
> +        in these bits share an L2 and have the same cluster_id.
> +
> +        CPUs for which cluster information is unavailable will show 65535
> +        (BAD_APICID) as the cluster_id.

"... return cluster_id of 65535 (BAD_APICID)."

>      The number of online threads is also printed in /proc/cpuinfo "siblings."
>  
> +  - topology_cluster_cpumask():
> +
> +    The cpumask contains all online threads in the cluster to which a thread
> +    belongs.
> +

Looks OK.

>      The physical package ID to which a thread belongs.
>  
> +  - topology_cluster_id();
> +
> +    The ID of the cluster to which a thread belongs.
> +

Looks OK.

Thanks.

-- 
An old man doll... just what I always wanted! - Clara