linux-kernel - Re: [PATCH] perf sched timehist: Improve error message when analyzing wrong file

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Message-ID: <72c47909-8e9c-616c-1afe-5daa12f44473@gmail.com>
Date:   Tue, 29 Nov 2016 13:17:43 -0700
From:   David Ahern <dsahern@...il.com>
To:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:     mingo@...nel.org, peterz@...radead.org, namhyung@...nel.org,
        jolsa@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf sched timehist: Improve error message when analyzing
 wrong file

On 11/29/16 1:14 PM, Arnaldo Carvalho de Melo wrote:
> It uses things like:
> 
>         if (kmem_page) {
>                 struct perf_evsel *evsel;
> 
>                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
>                                                              "kmem:mm_page_alloc");
>                 if (evsel == NULL) {
>                         pr_err(errmsg, "page", "page");
>                         goto out_delete;
>                 }
> 

I thought something like existed but did not find it looking at kvm and sched commands. Will re-spin to be consistent with kmem.