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Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include namespaces related info

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include namespaces related info
Date 2016-12-15 19:50 +0100
Message-ID <sOJgl-PQ-1@gated-at.bofh.it> (permalink)
References <sOJ6F-Ms-5@gated-at.bofh.it> <sOJ6F-Ms-9@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Fri, Dec 16, 2016 at 12:07:06AM +0530, Hari Bathini wrote:
> +struct perf_ns_link_info {
> +	__u64	dev;
> +	__u64	ino;
> +};
> +
> +enum {
> +	NET_NS_INDEX		= 0,
> +	UTS_NS_INDEX		= 1,
> +	IPC_NS_INDEX		= 2,
> +	PID_NS_INDEX		= 3,
> +	USER_NS_INDEX		= 4,
> +	MNT_NS_INDEX		= 5,
> +	CGROUP_NS_INDEX		= 6,
> +
> +	NAMESPACES_MAX,		/* maximum available namespaces */
> +};
> +
>  enum perf_event_type {
>  
>  	/*
> @@ -862,6 +880,17 @@ enum perf_event_type {
>  	 */
>  	PERF_RECORD_SWITCH_CPU_WIDE		= 15,
>  
> +	/*
> +	 * struct {
> +	 *	struct perf_event_header	header;
> +	 *	u32				pid;
> +	 *	u32				tid;
> +	 *	struct namespace_link_info	link_info[NAMESPACES_MAX];
> +	 *	struct sample_id		sample_id;
> +	 * };
> +	 */
> +	PERF_RECORD_NAMESPACES			= 16,
> +
>  	PERF_RECORD_MAX,			/* non-ABI */
>  };

What happens if a future kernel adds another namespace?

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[PATCH v4 0/3] perf: add support for analyzing events for containers Hari Bathini <hbathini@linux.vnet.ibm.com> - 2016-12-15 19:40 +0100
  [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include  namespaces related info Hari Bathini <hbathini@linux.vnet.ibm.com> - 2016-12-15 19:40 +0100
    Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include  namespaces related info Peter Zijlstra <peterz@infradead.org> - 2016-12-15 19:50 +0100
      Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include  namespaces related info Hari Bathini <hbathini@linux.vnet.ibm.com> - 2016-12-16 08:10 +0100
        Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include  namespaces related info Peter Zijlstra <peterz@infradead.org> - 2016-12-16 09:30 +0100
          Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include  namespaces related info Hari Bathini <hbathini@linux.vnet.ibm.com> - 2016-12-16 19:30 +0100
            Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include  namespaces related info Peter Zijlstra <peterz@infradead.org> - 2016-12-16 21:10 +0100
              Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include  namespaces related info Hari Bathini <hbathini@linux.vnet.ibm.com> - 2016-12-21 14:10 +0100
                Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include  namespaces related info Peter Zijlstra <peterz@infradead.org> - 2016-12-21 14:30 +0100
                Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include  namespaces related info Hari Bathini <hbathini@linux.vnet.ibm.com> - 2016-12-21 17:00 +0100
                Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include namespaces related info ebiederm@xmission.com (Eric W. Biederman) - 2016-12-22 08:30 +0100
                Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include  namespaces related info Peter Zijlstra <peterz@infradead.org> - 2016-12-22 09:00 +0100
                Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include namespaces related info ebiederm@xmission.com (Eric W. Biederman) - 2016-12-22 11:30 +0100
                Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include  namespaces related info Peter Zijlstra <peterz@infradead.org> - 2016-12-22 14:30 +0100
                Re: [PATCH v4 1/3] perf: add PERF_RECORD_NAMESPACES to include namespaces related info ebiederm@xmission.com (Eric W. Biederman) - 2016-12-22 19:30 +0100
  [PATCH v4 2/3] perf tool: add PERF_RECORD_NAMESPACES to include  namespaces related info Hari Bathini <hbathini@linux.vnet.ibm.com> - 2016-12-15 19:40 +0100
    Re: [PATCH v4 2/3] perf tool: add PERF_RECORD_NAMESPACES to include  namespaces related info Jiri Olsa <jolsa@redhat.com> - 2016-12-17 18:50 +0100
      Re: [PATCH v4 2/3] perf tool: add PERF_RECORD_NAMESPACES to include  namespaces related info Hari Bathini <hbathini@linux.vnet.ibm.com> - 2016-12-21 14:20 +0100
  Re: [PATCH v4 0/3] perf: add support for analyzing events for  containers Krister Johansen <kjlx@templeofstupid.com> - 2016-12-29 02:50 +0100
    Re: [PATCH v4 0/3] perf: add support for analyzing events for  containers Hari Bathini <hbathini@linux.vnet.ibm.com> - 2017-01-03 12:30 +0100

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