From: jamal <hadi@cyberus.ca>
To: Changli Gao <xiaosuo@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Patrick McHardy <kaber@trash.net>,
Tom Herbert <therbert@google.com>,
netdev@vger.kernel.org
Subject: Re: [PATCH RFC] act_cpu: packet distributing
Date: Thu, 15 Jul 2010 08:48:59 -0400 [thread overview]
Message-ID: <1279198139.4510.710.camel@bigi> (raw)
In-Reply-To: <AANLkTimPmXWyAspJqnya7aM_vDRNzDdJJf2bl7CYrAXN@mail.gmail.com>
On Wed, 2010-07-14 at 12:17 +0800, Changli Gao wrote:
> Thanks, I'll try. It is a write critical section, and for me it is
> difficult to convert this lock to RCU. Could you show me some
> examples?
RCU maybe a little trickier here Eric. Actions could be shared i.e.
example, it is possible to have a policer action restricting rates for a
group of flows across multiple netdevices etc. Since action stats get
written to by different CPUs concurrently. It could be probably done if
one was to implement per-cpu stats which get summed-up when user space
asks.
cheers,
jamal
next prev parent reply other threads:[~2010-07-15 12:49 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-14 3:17 [PATCH RFC] act_cpu: packet distributing Changli Gao
2010-07-14 3:27 ` Changli Gao
2010-07-14 3:41 ` Eric Dumazet
2010-07-14 4:17 ` Changli Gao
2010-07-14 4:30 ` Eric Dumazet
2010-07-15 12:48 ` jamal [this message]
2010-07-15 16:54 ` Eric Dumazet
2010-07-15 23:30 ` Changli Gao
2010-07-16 4:42 ` Eric Dumazet
2010-07-16 13:16 ` jamal
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