linux-kernel - Re: [RFC PATCH v2 2/3] tracefs: add instances support for uprobe events

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Message-Id: <57A3527A.2060108@linux.vnet.ibm.com>
Date:	Thu, 4 Aug 2016 20:04:34 +0530
From:	Aravinda Prasad <aravinda@...ux.vnet.ibm.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Hari Bathini <hbathini@...ux.vnet.ibm.com>, daniel@...earbox.net,
	peterz@...radead.org, linux-kernel@...r.kernel.org,
	acme@...nel.org, alexander.shishkin@...ux.intel.com,
	mingo@...hat.com, paulus@...ba.org, ebiederm@...ssion.com,
	kernel@...p.com, viro@...iv.linux.org.uk, ananth@...ibm.com
Subject: Re: [RFC PATCH v2 2/3] tracefs: add instances support for uprobe
 events



On Thursday 04 August 2016 07:38 PM, Steven Rostedt wrote:
> On Thu, 4 Aug 2016 19:16:03 +0530
> Aravinda Prasad <aravinda@...ux.vnet.ibm.com> wrote:
> 
> 
>> Separation is based on the context in which the function is called.
>> Hence, containers can see only those kernel functions that are
>> triggered/invoked by the processes running inside that container and
>> should not see other kernel functions, for example, called by RCU grace
>> period kthread or any other kthread.
>>
> 
> What about interrupts and softirqs? They run under the container
> process's context, but service other processes outside the container.
> Same goes for trace events.

Interrupts and softirqs are tricky. We have not yet figured that out.

Same for trace events. Had similar discussion for trace events with
Brendan:

http://www.spinics.net/lists/linux-perf-users/msg03018.html
(Last section of the mail is on trace event)

Regards,
Aravinda

> 
> -- Steve
> 

-- 
Regards,
Aravinda