netdev - Re: + gen_estimator-fix-locking-and-timer-related-bugs.patch added to -mm tree

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Date:	Tue, 10 Jul 2007 14:20:12 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Jarek Poplawski <jarkao2@...pl>
CC:	Ranko Zivojnovic <ranko@...dernet.net>, akpm@...ux-foundation.org,
	netdev@...r.kernel.org
Subject: Re: + gen_estimator-fix-locking-and-timer-related-bugs.patch added
 to -mm tree

Jarek Poplawski wrote:
> On Tue, Jul 10, 2007 at 01:09:07PM +0300, Ranko Zivojnovic wrote:
> 
>>However I decided not to use _rcu based iteration neither the
>>rcu_read_lock() after going through the RCU documentation and a bunch of
>>examples in kernel that iterate through the lists using non _rcu macros
>>and do list_del_rcu() just fine.
>>
>>For readability, the reference to list_del_rcu as well as call_rcu, I
>>believe, should be enough of the indication. Please do correct me if I
>>am wrong here.
> 
> 
> It's only my opinion, and it's probably not very popular at least
> at net/ code, so it's more about general policy and not this
> particular code. But:
> - if somebody is looking after some rcu related problems, why can't
> he/she spare some time by omitting lists without _rcu and not
> analyzing why/how such lists are used and locked?


RCU is used for the read-side, using it on the write-side just makes
things *less* understandable IMO. It will look like the read-side
but still do modifications.

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