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

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Message-ID: <20130124172340.GA15868@redhat.com>
Date:	Thu, 24 Jan 2013 18:23:40 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Josh Stone <jistone@...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, Josh Stone wrote:
>
> 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.

This is what I meant. The question is how can I do this.

Oleg.

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