linux-kernel - Re: [test result] dirty logging without srcu update -- Re: [RFC][PATCH] srcu: Implement call

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Date:	Thu, 02 Feb 2012 19:40:44 +0900
From:	Takuya Yoshikawa <yoshikawa.takuya@....ntt.co.jp>
To:	Avi Kivity <avi@...hat.com>
CC:	Peter Zijlstra <peterz@...radead.org>, paulmck@...ux.vnet.ibm.com,
	Oleg Nesterov <oleg@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	KVM list <kvm@...r.kernel.org>
Subject: Re: [test result] dirty logging without srcu update -- Re: [RFC][PATCH]
 srcu: Implement call_srcu()

(2012/02/02 19:21), Avi Kivity wrote:

>>
>> I used "unsigned int" just because I wanted to use the current
>> atomic_clear_mask() as is.
>>
>> We need to implement atomic_clear_mask_long() or use ...
>
> If we use cmpxchg8b/cmpxchg16b then this won't fit with the
> atomic_*_long family.
>

OK, I will try.


I have one concern about correctness issue though:

	concurrent rmap write protection may not be safe due to
	delayed tlb flush ... cannot happen?


	Takuya
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