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Date: Fri, 25 Jan 2013 20:23:53 +0900
From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Organization: Hitachi, Ltd., Japan
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To: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>, Ingo Molnar <mingo@kernel.org>,
        Ingo Molnar <mingo@elte.hu>, Anton Arapov <anton@redhat.com>,
        Christoph Hellwig <hch@infradead.org>, Josh Stone <jistone@redhat.com>,
        linux-kernel@vger.kernel.org, Steven Rostedt <rostedt@goodmis.org>,
        Suzuki Poulose <suzuki@in.ibm.com>,
        Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
        "yrl.pp-manager.tt@hitachi.com" <yrl.pp-manager.tt@hitachi.com>
Subject: Re: Re: [GIT PULL] uprobes: pre-filtering
References: <20130113185916.GA25831@redhat.com> <20130124121720.GA3104@gmail.com> <20130124154018.GA8580@redhat.com> <20130124154159.GB32071@gmail.com> <20130124170612.GA14823@redhat.com> <20130125064629.GD23723@linux.vnet.ibm.com>
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(2013/01/25 15:46), Srikar Dronamraju wrote:
> The other alternative is to extend the current abi and pass the
> prefilter option. Should we extend the abi for userspace tracing is
> obviously debatable.

Hmm, afaik, ftrace has set_ftrace_pid and perf record
also has --pid option. I think you can hook those
to set pre-filter option at first. Of course, since
those are universal options, we may need other per-event
pid filter.

Thank you,

-- 
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com