From: Peter Zijlstra <peterz@infradead.org>
To: Borislav Petkov <bp@alien8.de>
Cc: X86 ML <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH] x86/topology: Document cpu_llc_id
Date: Wed, 7 Sep 2016 12:36:41 +0200 [thread overview]
Message-ID: <20160907103641.GO10138@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20160907092219.5523-1-bp@alien8.de>
On Wed, Sep 07, 2016 at 11:22:19AM +0200, Borislav Petkov wrote:
> From: Borislav Petkov <bp@suse.de>
>
> It means different things on Intel and AMD so write it down so that
> there's no confusion.
>
> Signed-off-by: Borislav Petkov <bp@suse.de>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> ---
> Documentation/x86/topology.txt | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/Documentation/x86/topology.txt b/Documentation/x86/topology.txt
> index 06afac252f5b..7a5485730476 100644
> --- a/Documentation/x86/topology.txt
> +++ b/Documentation/x86/topology.txt
> @@ -63,6 +63,12 @@ The topology of a system is described in the units of:
> The maximum possible number of packages in the system. Helpful for per
> package facilities to preallocate per package information.
>
> + - cpu_llc_id:
> +
> + A per-CPU variable containing:
> + - On Intel, the first APIC ID of the list of CPUs sharing the Last Level
> + Cache
> + - On AMD, the Node ID containing the Last Level Cache.
And there are no AMD parts where there are multiple LLCs on a Node? Like
where there isn't an L3 and the L2 is only per cluster?
next prev parent reply other threads:[~2016-09-07 10:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-07 9:22 [PATCH] x86/topology: Document cpu_llc_id Borislav Petkov
2016-09-07 10:36 ` Peter Zijlstra [this message]
2016-11-14 6:29 ` Borislav Petkov
2016-11-17 9:45 ` [PATCH -v1.1] " Borislav Petkov
2016-11-17 12:57 ` Yazen Ghannam
2016-11-17 14:16 ` Borislav Petkov
2016-12-19 11:34 ` [tip:x86/urgent] " tip-bot for Borislav Petkov
2016-12-20 9:34 ` tip-bot for Borislav Petkov
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