linux-kernel - Re: [patch 5/5] tree/tiny rcu: Add debug RCU head objects (v5)

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Message-ID: <4BCBAF46.4010603@cn.fujitsu.com>
Date:	Mon, 19 Apr 2010 09:17:58 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	paulmck@...ux.vnet.ibm.com
CC:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	akpm@...ux-foundation.org, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org, dipankar@...ibm.com,
	josh@...htriplett.org, dvhltc@...ibm.com, niv@...ibm.com,
	tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
	Valdis.Kletnieks@...edu, dhowells@...hat.com,
	eric.dumazet@...il.com, adobriyan@...il.com,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [patch 5/5] tree/tiny rcu: Add debug RCU head objects (v5)


Reviewed-by: Lai Jiangshan <laijs@...fujitsu.com>

Mathieu Desnoyers wrote:
> Helps finding racy users of call_rcu(), which results in hangs because list
> entries are overwritten and/or skipped.
> 
> Changelog since v4:
> - Bissectability is now OK
> - Now generate a WARN_ON_ONCE() for non-initialized rcu_head passed to
>   call_rcu(). Statically initialized objects are detected with
>   object_is_static().
> - Rename rcu_head_init_on_stack to init_rcu_head_on_stack.
> - Remove init_rcu_head() completely.
> 
> Changelog since v3:
> - Include comments from Lai Jiangshan
> 
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