linux-kernel - Re: [PATCH 0/3] A kernel tracing interface

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Message-ID: <46FAB8E4.5070809@us.ibm.com>
Date:	Wed, 26 Sep 2007 12:54:12 -0700
From:	David Wilder <dwilder@...ibm.com>
To:	Randy Dunlap <randy.dunlap@...cle.com>
CC:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	hch@...radead.org, mathieu.desnoyers@...ymtl.ca
Subject: Re: [PATCH 0/3] A kernel tracing interface - (updated)

Randy Dunlap wrote:
> On Wed, 26 Sep 2007 11:22:29 -0700 David J. Wilder wrote:
> 
>> These patches provide a kernel tracing interface called "trace".
>>
>> (update) Moved the sample code to the new samples\ subdir
>>
>> The motivation for "trace" is to:
>> - Provide a simple set of tracing primitives that will utilize the high-
>>   performance and low-overhead of relayfs for passing traces data from
>>   kernel to user space.
>> - Provide a common user interface for managing kernel traces.
>> - Allow for binary as well as ascii trace data.
>> - Incorporate features from the systemtap runtime that are
>>   useful to others.
>>
>> Patches are against 2.6.23-rc6-mm1
>>
>> Summary of patches:
>> [patch 1/3]  Trace code and documentation
>> [patch 2/3]  Relay Reset Consumed
>> [patch 3/3]  Trace sample
>>
>> Note: Patches 1/3 and 2/3 must be applied together.
> 
> Patch 2 provides an interface that patch 1 needs, correct?
Yes.
> So yes, patches 1 & 2 need to be applied together (merged),
> or their order could be reversed, yes?  
2/3 should be applied at the same time as 1/3,  or 2/3 can be applied 
standalone.  The order they are applied makes no difference.  But trace 
will not build if the relay patch is not applied.

Can't the Relay patch
> be merged standalone without breaking anything?

Yes the relay patch can be applied standalone.



> 
> 
>> Note: The following patches must be applied with 3/3.
>> [patch 3/5] Add samples subdir
>> 	http://lkml.org/lkml/2007/9/25/157
>> [patch 4/5] Linux Kernel Markers - Samples
>> 	http://lkml.org/lkml/2007/9/25/166
> 
> 
> ---
> ~Randy
> Phaedrus says that Quality is about caring.
> 

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