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Date: Thu, 31 Mar 2011 09:53:21 +0800
From: Lai Jiangshan <laijs@cn.fujitsu.com>
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To: paulmck@linux.vnet.ibm.com
CC: Michal Marek <mmarek@suse.cz>, Peter Zijlstra <peterz@infradead.org>,
        "H. Peter Anvin" <hpa@linux.intel.com>,
        Jan Beulich <JBeulich@novell.com>, Ingo Molnar <mingo@elte.hu>,
        Alexander van Heukelum <heukelum@fastmail.fm>,
        Dipankar Sarma <dipankar@in.ibm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Sam Ravnborg <sam@ravnborg.org>, David Howells <dhowells@redhat.com>,
        Oleg Nesterov <oleg@redhat.com>, Roland McGrath <roland@redhat.com>,
        Serge Hallyn <serue@us.ibm.com>, linux-kernel@vger.kernel.org,
        Thomas Gleixner <tglx@linutronix.de>,
        Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [RFC PATCH 4/5] RCU: Add TASK_RCU_OFFSET
References: <4D924FEE.8040804@linux.intel.com> <20110329214704.GM2261@linux.vnet.ibm.com> <4D9256AF.5000308@linux.intel.com> <20110330004725.GO2261@linux.vnet.ibm.com> <4D92BECA.50802@cn.fujitsu.com> <4D92DA32.2010809@cn.fujitsu.com> <20110330105505.GA3195@sepie.suse.cz> <1301482656.4859.171.camel@twins> <4D931814.9090100@suse.cz> <4D93D29C.5010702@cn.fujitsu.com> <20110331012155.GZ2255@linux.vnet.ibm.com>
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On 03/31/2011 09:21 AM, Paul E. McKenney wrote:
> On Thu, Mar 31, 2011 at 09:02:20AM +0800, Lai Jiangshan wrote:
>> On 03/30/2011 07:46 PM, Michal Marek wrote:
>>> On 30.3.2011 12:57, Peter Zijlstra wrote:
>>>> On Wed, 2011-03-30 at 12:55 +0200, Michal Marek wrote:
>>>>> Subject: [PATCH] headers: Allow for lightweight inclusion of task_struct definition
>>>>>
>>>>> Factor out a couple of type definitions to <header>_types.h to allow
>>>>> using task_struct without pulling tons of new dependencies via sched.h.
>>>>
>>>> Urgh, not pretty.. so why not clean up sched.h properly? There's way too
>>>> much cruft in there.
>>>
>>> It was a proof-of-concept to show that it is doable to have proper
>>> definition of task_struct in rcupdate.h. Not an entry for any code
>>> beauty contest.
>>>
>>> Michal
>>>
>>
>> I like this cleanup, could you continue for this hard job? I will help you if required.
>>
>> Ingo & Peter - will you accept the patches when it is done.
>>
>> Acked-by: Lai Jiangshan <laijs@cn.fujitsu.com>
> 
> I certainly like the idea of being able to inline TREE_PREEMPT_RCU's
> rcu_read_lock() and rcu_read_unlock() using normal C code!
> 
> 							Thanx, Paul
> 

kernel-offset.c can be merged to some branch of your tree for
testing inlined TREE_PREEMPT_RCU's rcu_read_lock() and rcu_read_unlock()
before the kernel headers splitting is done.

Can the [patch 1/5] be merged to mainline earlier? could you add it to origin/rcu/next?

Thanks,
Lai
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