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Re: [PATCH -tip perf/probes 00/10] x86 insn decoder bugfixes and perf-probe syntax changes
- From: Masami Hiramatsu <mhiramat at redhat dot com>
- To: Ingo Molnar <mingo at elte dot hu>
- Cc: Arnaldo Carvalho de Melo <acme at redhat dot com>, Frédér ic Weisbecker <fweisbec at gmail dot com>, lkml <linux-kernel at vger dot kernel dot org>, Steven Rostedt <rostedt at goodmis dot org>, Jim Keniston <jkenisto at us dot ibm dot com>, Ananth N Mavinakayanahalli <ananth at in dot ibm dot com>, Christoph Hellwig <hch at infradead dot org>, "Frank Ch. Eigler" <fche at redhat dot com>, "H. Peter Anvin" <hpa at zytor dot com>, Jason Baron <jbaron at redhat dot com>, "K.Prasad" <prasad at linux dot vnet dot ibm dot com>, Peter Zijlstra <peterz at infradead dot org>, Srikar Dronamraju <srikar at linux dot vnet dot ibm dot com>, systemtap <systemtap at sources dot redhat dot com>, DLE <dle-develop at lists dot sourceforge dot net>
- Date: Mon, 02 Nov 2009 19:36:50 -0500
- Subject: Re: [PATCH -tip perf/probes 00/10] x86 insn decoder bugfixes and perf-probe syntax changes
- References: <20091027204156.30545.96425.stgit@harusame> <20091029085348.GD26970@elte.hu> <4AE9C919.4070003@redhat.com> <4AEF4C29.2060501@redhat.com>
Masami Hiramatsu wrote:
Masami Hiramatsu wrote:
Ingo Molnar wrote:
What we want here is two fold:
- enable kprobes event support when perf events is enabled and kprobes
is enabled. We dont want another config option for it.
Sure, at least that combination should enable kprobe-tracer forcibly.
Hmm, someone may not want to enables kprobe-tracer. Perhaps,
"default y if (EVENT_PROFILE)" is enough, isn't it?
Oops, this causes recursive dependency error :-(
kernel/trace/Kconfig:90:error: found recursive dependency: TRACING ->
EVENT_TRACING -> EVENT_PROFILE -> KPROBE_TRACER -> GENERIC_TRACER -> TRACING
At this time, this kind of weak dependency may not supported by Kbuild yet.
Thank you,
--
Masami Hiramatsu
Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division
e-mail: mhiramat@redhat.com