linux-kernel - Re: [GIT PULL] uprobes: pre-filtering

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Date:	Thu, 24 Jan 2013 09:05:46 -0800
From:	Josh Stone <jistone@...hat.com>
To:	Oleg Nesterov <oleg@...hat.com>
CC:	Ingo Molnar <mingo@...nel.org>, Ingo Molnar <mingo@...e.hu>,
	Anton Arapov <anton@...hat.com>,
	Christoph Hellwig <hch@...radead.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] uprobes: pre-filtering

On 01/24/2013 07:40 AM, Oleg Nesterov wrote:
> I'll try to implement the pid-base filtering at least for
> tracing/uprobe_events, but this needs a time. Not only I am not familiar
> with this code, I am not sure how this interface should actually look.
> And I agree, perf should be able to use it somehow, perhaps at least
> to allow to probe a single task/mm.

Even without changing perf's interface, it already has constraints for
its child processes (versus --all-cpus) or for specific pid/tid/uid.
Pre-filtering could help enforce and optimize those constraints.
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