netdev - Re: [net-next PATCH v3 03/15] net: sched: cls

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 09 Sep 2014 05:29:58 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	John Fastabend <john.fastabend@...il.com>
Cc:	xiyou.wangcong@...il.com, davem@...emloft.net, jhs@...atatu.com,
	netdev@...r.kernel.org, paulmck@...ux.vnet.ibm.com,
	brouer@...hat.com
Subject: Re: [net-next PATCH v3 03/15] net: sched: cls_basic use RCU

On Mon, 2014-09-08 at 22:55 -0700, John Fastabend wrote:
> Enable basic classifier for RCU.
> 
> Dereferencing tp->root may look a bit strange here but it is needed
> by my accounting because it is allocated at init time and needs to
> be kfree'd at destroy time. However because it may be referenced in
> the classify() path we must wait an RCU grace period before free'ing
> it. We use kfree_rcu() and rcu_ APIs to enforce this. This pattern
> is used in all the classifiers.
> 
> Also the hgenerator can be incremented without concern because it
> is always incremented under RTNL.
> 
> Signed-off-by: John Fastabend <john.r.fastabend@...el.com>
> ---

Acked-by: Eric Dumazet <edumazet@...gle.com>


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html