linux-kernel - Re: [GIT PULL rcu/next] rcu commits for 2.6.40

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Date:	Thu, 12 May 2011 00:42:50 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	paulmck@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL rcu/next] rcu commits for 2.6.40

On 05/12/2011 12:27 AM, Yinghai Lu wrote:
> On 05/11/2011 11:03 PM, Ingo Molnar wrote:
>>
>> * Yinghai Lu <yinghai@...nel.org> wrote:
>>
>>> e59fb3120becfb36b22ddb8bd27d065d3cdca499 is the first bad commit
>>> commit e59fb3120becfb36b22ddb8bd27d065d3cdca499
>>> Author: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
>>> Date:   Tue Sep 7 10:38:22 2010 -0700
>>>
>>>     rcu: Decrease memory-barrier usage based on semi-formal proof
>>
>> Find below an (untested!) attempt at reverting it for debugging purposes: could 
>> you please try it, does your system now boot up fine?
>>
>> Thanks,
>>
>> 	Ingo
>>
> 
> yes, reverted manually that commit fix the problem.

on system with 8 sockets westmere-ex

it seems other commits after that commit contribute some delay too.

[   32.240739] cpu_dev_init done
[   73.587288] memory_dev_init done

Thanks

Yinghai
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