linux-kernel - Re: [tip:core/rcu] Revert "rcu: Decrease memory-barrier usage based on semi-formal proof"

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Message-ID: <4DDD8775.1000501@kernel.org>
Date:	Wed, 25 May 2011 15:49:25 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	paulmck@...ux.vnet.ibm.com
CC:	linux-kernel@...r.kernel.org, mingo@...hat.com, hpa@...or.com,
	tglx@...utronix.de, mingo@...e.hu
Subject: Re: [tip:core/rcu] Revert "rcu: Decrease memory-barrier usage based
 on semi-formal proof"

On 05/25/2011 03:34 PM, Paul E. McKenney wrote:
> On Wed, May 25, 2011 at 03:15:50PM -0700, Yinghai Lu wrote:
>>> There is a new branch yinghai.2011.05.24a on:
>>>
>>> git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu.git
>>>
>>> Or will be as soon as kernel.org updates its mirrors.
>>>
>>> I am not sure I could call this "clean", but it does revert that commit
>>> and 11 of the subsequent commits that depend on it.  It does build,
>>> and I will test it once my currently running tests complete.
>>
>> yes, with those revert, there is no delay in 10 times booting.
> 
> Unfortunately, there are rcutorture test failures with the revert...

confused.

what is the next?

Yinghai

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