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Date: Thu, 07 Apr 2011 12:19:04 +0900
From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Organization: Systems Development Lab., Hitachi, Ltd., Japan
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To: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@elte.hu>,
        Steven Rostedt <rostedt@goodmis.org>, Linux-mm <linux-mm@kvack.org>,
        Arnaldo Carvalho de Melo <acme@infradead.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
        Christoph Hellwig <hch@infradead.org>,
        Andi Kleen <andi@firstfloor.org>, Thomas Gleixner <tglx@linutronix.de>,
        Jonathan Corbet <corbet@lwn.net>, Oleg Nesterov <oleg@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Jim Keniston <jkenisto@linux.vnet.ibm.com>,
        Roland McGrath <roland@hack.frob.com>,
        SystemTap <systemtap@sources.redhat.com>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 2.6.39-rc1-tip 26/26] 26: uprobes: filter chain
References: <20110401143223.15455.19844.sendpatchset@localhost6.localdomain6> <20110401143737.15455.30181.sendpatchset@localhost6.localdomain6> <4D9A6FE8.2010301@hitachi.com> <20110406224148.GA5806@linux.vnet.ibm.com>
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(2011/04/07 7:41), Srikar Dronamraju wrote:
>>> +static bool filter_chain(struct uprobe *uprobe, struct task_struct *t)
>>> +{
>>> +	struct uprobe_consumer *consumer;
>>> +	bool ret = false;
>>> +
>>> +	down_read(&uprobe->consumer_rwsem);
>>> +	for (consumer = uprobe->consumers; consumer;
>>> +					consumer = consumer->next) {
>>> +		if (!consumer->filter || consumer->filter(consumer, t)) {
>>> +			ret = true;
>>> +			break;
>>> +		}
>>> +	}
>>> +	up_read(&uprobe->consumer_rwsem);
>>> +	return ret;
>>> +}
>>> +
>>
>> Where this function is called from ? This patch seems the last one of this series...
>>
> 
> Sorry for the delayed reply, I was travelling to LFCS.
> Still I have to connect the filter from trace/perf probe. 

I see, and I'd like to suggest you to separate that series
from this "uprobe" series. For upstream merge, indeed, we
need a consumer of the uprobe. However, it should be as simple
as possible, so that we can focus on reviewing uprobe itself.

> Thats listed as todo and thats the next thing I am planning to work on.

Interesting:) Could you tell us what the plan will introduce?
How will it be connected? how will we use it?

Thank you,

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