linux-kernel - Re: [PATCH v2 01/20] perf/doc: update design.txt for exclude

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Date:   Mon, 26 Nov 2018 18:22:47 +0000
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     Andrew Murray <andrew.murray@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Will Deacon <will.deacon@....com>,
        Mark Rutland <mark.rutland@....com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>, x86@...nel.org,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        "David S . Miller" <davem@...emloft.net>,
        sparclinux@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-s390@...r.kernel.org, linux-mips@...ux-mips.org,
        linux-kernel@...r.kernel.org, linux-alpha@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 01/20] perf/doc: update design.txt for
 exclude_{host|guest} flags

Hi Andrew,

On 26/11/2018 11:12, Andrew Murray wrote:
> Update design.txt to reflect the presence of the exclude_host
> and exclude_guest perf flags.
> 
> Signed-off-by: Andrew Murray <andrew.murray@....com>

Thanks a lot for adding this !

> ---
>   tools/perf/design.txt | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/tools/perf/design.txt b/tools/perf/design.txt
> index a28dca2..5b2b23b 100644
> --- a/tools/perf/design.txt
> +++ b/tools/perf/design.txt
> @@ -222,6 +222,10 @@ The 'exclude_user', 'exclude_kernel' and 'exclude_hv' bits provide a
>   way to request that counting of events be restricted to times when the
>   CPU is in user, kernel and/or hypervisor mode.
>   
> +Furthermore the 'exclude_host' and 'exclude_guest' bits provide a way
> +to request counting of events restricted to guest and host contexts when
> +using KVM virtualisation.

minor nit: could we generalise this to :

"using Linux as the hypervisor".

Otherwise, looks good to me.

Cheers
Suzuki