linux-kernel - Re: [PATCH] perf probe: Ignore vmlinux build-id when offline vmlinux and dry-run used

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Message-ID: <588962F2.3090208@akamai.com>
Date:   Wed, 25 Jan 2017 20:46:10 -0600
From:   Josh Hunt <johunt@...mai.com>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        linux-kernel@...r.kernel.org, bgregg@...flix.com
Subject: Re: [PATCH] perf probe: Ignore vmlinux build-id when offline vmlinux
 and dry-run used

On 01/25/2017 08:37 PM, Masami Hiramatsu wrote:
> On Tue, 24 Jan 2017 16:41:28 -0500
> Josh Hunt <johunt@...mai.com> wrote:
>
>> Commit e50243bb ("perf probe: Ignore vmlinux Build-id when offline vmlinux given")
>> added the ability to ignore vmlinux when an offline vmlinux is passed and no
>> l, d, or a flag is also passed. This extends that to ignore build-id when
>> -n/--dry-run is used. This way we can gather probe information for offline kernels
>> using the method Brendan Gregg mentions in this post:
>> http://www.brendangregg.com/blog/2014-09-11/perf-kernel-line-tracing.html .
>
> Sorry, NAK.
> Could you use -D (--definition) for that usage? It directly gives you
> the definition on stdout, and also ignore the buildid.

Ahhh! I guess I totally missed the point of that flag. You're right. It 
works exactly the way I want :)

Thanks. Please ignore my patch.

Josh