From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: David Miller <davem@davemloft.net>
Cc: mingo@elte.hu, dada1@cosmosbay.com,
torvalds@linux-foundation.org, shemminger@vyatta.com,
zbr@ioremap.net, peterz@infradead.org, jarkao2@gmail.com,
paulus@samba.org, paulmck@linux.vnet.ibm.com, kaber@trash.net,
jeff.chua.linux@gmail.com, laijs@cn.fujitsu.com,
jengelh@medozas.de, r000n@r000n.net,
linux-kernel@vger.kernel.org, netfilter-devel@vger.kernel.org,
netdev@vger.kernel.org, benh@kernel.crashing.org
Subject: Re: [PATCH] netfilter: use per-CPU r**ursive lock {XV}
Date: Tue, 28 Apr 2009 09:52:19 -0400 [thread overview]
Message-ID: <20090428135219.GA28513@Krystal> (raw)
In-Reply-To: <20090428.064340.193569214.davem@davemloft.net>
* David Miller (davem@davemloft.net) wrote:
> From: Ingo Molnar <mingo@elte.hu>
> Date: Tue, 28 Apr 2009 14:40:33 +0200
>
> > IMHO this locking construct should be considered for
> > linux/local_lock.h and kernel/local_lock.c. Even if the netfilter
> > code drops its use soon afterwards ;-)
>
> If you can show me have to pass a per-cpu variable (the variable,
> not a dereference of it) as an argument to an inline function,
> I'll implement this :-)
>
> It has to be dereferenced after local_bh_disable() for the
> read side acquisition.
The local_bh_disable() could be outside of the locking construct. This
would make it easier to adapt it to various users (irq disable, bh
disable, preempt disable) depending on the contexts from which they much
be protected.
And if it still does not work for some reason, using a #define is
discouraged, but could work.
Mathieu
--
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
next prev parent reply other threads:[~2009-04-28 13:57 UTC|newest]
Thread overview: 215+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.64.0904101656190.2093@boston.corp.fedex.com>
[not found] ` <20090410095246.4fdccb56@s6510>
2009-04-11 1:25 ` iptables very slow after commit784544739a25c30637397ace5489eeb6e15d7d49 David Miller
2009-04-11 1:39 ` iptables very slow after commit 784544739a25c30637397ace5489eeb6e15d7d49 Linus Torvalds
2009-04-11 4:15 ` Paul E. McKenney
2009-04-11 5:14 ` Jan Engelhardt
2009-04-11 5:42 ` Paul E. McKenney
2009-04-11 6:00 ` David Miller
2009-04-11 18:12 ` Kyle Moffett
2009-04-11 18:32 ` Arkadiusz Miskiewicz
2009-04-12 0:54 ` david
2009-04-12 5:05 ` Kyle Moffett
2009-04-12 12:30 ` Harald Welte
2009-04-12 16:38 ` Jan Engelhardt
2009-04-11 15:07 ` Stephen Hemminger
2009-04-11 16:05 ` Jeff Chua
2009-04-11 17:51 ` Linus Torvalds
2009-04-11 7:08 ` Ingo Molnar
2009-04-11 15:05 ` Stephen Hemminger
2009-04-11 17:48 ` Paul E. McKenney
2009-04-12 10:54 ` Ingo Molnar
2009-04-12 11:34 ` Paul Mackerras
2009-04-12 17:31 ` Paul E. McKenney
2009-04-13 1:13 ` David Miller
2009-04-13 4:04 ` Paul E. McKenney
2009-04-13 16:53 ` [PATCH] netfilter: use per-cpu spinlock rather than RCU Stephen Hemminger
2009-04-13 17:40 ` Eric Dumazet
2009-04-13 18:11 ` Stephen Hemminger
2009-04-13 19:06 ` Martin Josefsson
2009-04-13 19:17 ` Linus Torvalds
2009-04-13 22:24 ` Andrew Morton
2009-04-13 23:20 ` Stephen Hemminger
2009-04-13 23:26 ` Andrew Morton
2009-04-13 23:37 ` Linus Torvalds
2009-04-13 23:52 ` Ingo Molnar
2009-04-14 12:27 ` Patrick McHardy
2009-04-14 14:23 ` Eric Dumazet
2009-04-14 14:45 ` Stephen Hemminger
2009-04-14 15:49 ` Eric Dumazet
2009-04-14 16:51 ` Jeff Chua
2009-04-14 18:17 ` [PATCH] netfilter: use per-cpu spinlock rather than RCU (v2) Stephen Hemminger
2009-04-14 19:28 ` Eric Dumazet
2009-04-14 21:11 ` Stephen Hemminger
2009-04-14 21:13 ` [PATCH] netfilter: use per-cpu spinlock rather than RCU (v3) Stephen Hemminger
2009-04-14 21:40 ` Eric Dumazet
2009-04-15 10:59 ` Patrick McHardy
2009-04-15 16:31 ` Stephen Hemminger
2009-04-15 20:55 ` Stephen Hemminger
2009-04-15 21:07 ` Eric Dumazet
2009-04-15 21:55 ` Jan Engelhardt
2009-04-16 12:12 ` Patrick McHardy
2009-04-16 12:24 ` Jan Engelhardt
2009-04-16 12:31 ` Patrick McHardy
2009-04-15 21:57 ` [PATCH] netfilter: use per-cpu rwlock rather than RCU (v4) Stephen Hemminger
2009-04-15 23:48 ` [PATCH] netfilter: use per-cpu spinlock rather than RCU (v3) David Miller
2009-04-16 0:01 ` Stephen Hemminger
2009-04-16 0:05 ` David Miller
2009-04-16 12:28 ` Patrick McHardy
2009-04-16 0:10 ` Linus Torvalds
2009-04-16 0:45 ` [PATCH] netfilter: use per-cpu spinlock and RCU (v5) Stephen Hemminger
2009-04-16 5:01 ` Eric Dumazet
2009-04-16 13:53 ` Patrick McHardy
2009-04-16 14:47 ` Paul E. McKenney
2009-04-16 16:10 ` [PATCH] netfilter: use per-cpu recursive spinlock (v6) Eric Dumazet
2009-04-16 16:20 ` Eric Dumazet
2009-04-16 16:37 ` Linus Torvalds
2009-04-16 16:59 ` Patrick McHardy
2009-04-16 17:58 ` Paul E. McKenney
2009-04-16 18:41 ` Eric Dumazet
2009-04-16 20:49 ` [PATCH[] netfilter: use per-cpu reader-writer lock (v0.7) Stephen Hemminger
2009-04-16 21:02 ` Linus Torvalds
2009-04-16 23:04 ` Ingo Molnar
2009-04-17 0:13 ` [PATCH] netfilter: use per-cpu recursive spinlock (v6) Paul E. McKenney
2009-04-16 13:11 ` [PATCH] netfilter: use per-cpu spinlock rather than RCU (v3) Patrick McHardy
2009-04-16 22:33 ` David Miller
2009-04-16 23:49 ` Paul E. McKenney
2009-04-16 23:52 ` [PATCH] netfilter: per-cpu spin-lock with recursion (v0.8) Stephen Hemminger
2009-04-17 0:15 ` Jeff Chua
2009-04-17 5:55 ` Peter Zijlstra
2009-04-17 6:03 ` Eric Dumazet
2009-04-17 6:14 ` Eric Dumazet
2009-04-17 17:08 ` Peter Zijlstra
2009-04-17 11:17 ` Patrick McHardy
2009-04-17 1:28 ` [PATCH] netfilter: use per-cpu spinlock rather than RCU (v3) Paul E. McKenney
2009-04-17 2:19 ` Mathieu Desnoyers
2009-04-17 5:05 ` Paul E. McKenney
2009-04-17 5:44 ` Mathieu Desnoyers
2009-04-17 14:51 ` Paul E. McKenney
2009-04-17 4:50 ` Stephen Hemminger
2009-04-17 5:08 ` Paul E. McKenney
2009-04-17 5:16 ` Eric Dumazet
2009-04-17 5:40 ` Paul E. McKenney
2009-04-17 8:07 ` David Miller
2009-04-17 15:00 ` Paul E. McKenney
2009-04-17 17:22 ` Peter Zijlstra
2009-04-17 17:32 ` Linus Torvalds
2009-04-17 6:12 ` Peter Zijlstra
2009-04-17 16:33 ` Paul E. McKenney
2009-04-17 16:51 ` Peter Zijlstra
2009-04-17 21:29 ` Paul E. McKenney
2009-04-18 9:40 ` Evgeniy Polyakov
2009-04-18 14:14 ` Paul E. McKenney
2009-04-20 17:34 ` [PATCH] netfilter: use per-cpu recursive lock (v10) Stephen Hemminger
2009-04-20 18:21 ` Paul E. McKenney
2009-04-20 18:25 ` Eric Dumazet
2009-04-20 20:32 ` Stephen Hemminger
2009-04-20 20:42 ` Stephen Hemminger
2009-04-20 21:05 ` Paul E. McKenney
2009-04-20 21:23 ` Paul Mackerras
2009-04-20 21:58 ` Paul E. McKenney
2009-04-20 22:41 ` Paul Mackerras
2009-04-20 23:01 ` [PATCH] netfilter: use per-cpu recursive lock (v11) Stephen Hemminger
2009-04-21 3:41 ` Lai Jiangshan
2009-04-21 3:56 ` Eric Dumazet
2009-04-21 4:15 ` Stephen Hemminger
2009-04-21 5:22 ` Lai Jiangshan
2009-04-21 5:45 ` Stephen Hemminger
2009-04-21 6:52 ` Lai Jiangshan
2009-04-21 8:16 ` Evgeniy Polyakov
2009-04-21 8:42 ` Lai Jiangshan
2009-04-21 8:49 ` David Miller
2009-04-21 8:55 ` Eric Dumazet
2009-04-21 9:22 ` Evgeniy Polyakov
2009-04-21 9:34 ` Lai Jiangshan
2009-04-21 5:34 ` Lai Jiangshan
2009-04-21 4:59 ` Eric Dumazet
2009-04-21 16:37 ` Paul E. McKenney
2009-04-21 5:46 ` Lai Jiangshan
2009-04-21 16:13 ` Linus Torvalds
2009-04-21 16:43 ` Stephen Hemminger
2009-04-21 16:50 ` Linus Torvalds
2009-04-21 18:02 ` Ingo Molnar
2009-04-21 18:15 ` Stephen Hemminger
2009-04-21 19:10 ` Ingo Molnar
2009-04-21 19:46 ` Eric Dumazet
2009-04-22 7:35 ` Ingo Molnar
2009-04-22 8:53 ` Eric Dumazet
2009-04-22 10:13 ` Jarek Poplawski
2009-04-22 11:26 ` Ingo Molnar
2009-04-22 11:39 ` Jarek Poplawski
2009-04-22 11:18 ` Ingo Molnar
2009-04-22 15:19 ` Linus Torvalds
2009-04-22 16:57 ` Eric Dumazet
2009-04-22 17:18 ` Linus Torvalds
2009-04-22 20:46 ` Jarek Poplawski
2009-04-22 17:48 ` Ingo Molnar
2009-04-21 21:04 ` Stephen Hemminger
2009-04-22 8:00 ` Ingo Molnar
2009-04-21 19:39 ` Ingo Molnar
2009-04-21 21:39 ` [PATCH] netfilter: use per-cpu recursive lock (v13) Stephen Hemminger
2009-04-22 4:17 ` Paul E. McKenney
2009-04-22 14:57 ` Eric Dumazet
2009-04-22 15:32 ` Linus Torvalds
2009-04-24 4:09 ` [PATCH] netfilter: use per-CPU recursive lock {XIV} Stephen Hemminger
2009-04-24 4:58 ` Eric Dumazet
2009-04-24 15:33 ` Patrick McHardy
2009-04-24 16:18 ` Stephen Hemminger
2009-04-24 20:43 ` Jarek Poplawski
2009-04-25 20:30 ` [PATCH] netfilter: iptables no lockdep is needed Stephen Hemminger
2009-04-26 8:18 ` Jarek Poplawski
2009-04-26 18:24 ` [PATCH] netfilter: use per-CPU recursive lock {XV} Eric Dumazet
2009-04-26 18:56 ` Mathieu Desnoyers
2009-04-26 21:57 ` Stephen Hemminger
2009-04-26 22:32 ` Mathieu Desnoyers
2009-04-27 17:44 ` Peter Zijlstra
2009-04-27 18:30 ` [PATCH] netfilter: use per-CPU r**ursive " Stephen Hemminger
2009-04-27 18:54 ` Ingo Molnar
2009-04-27 19:06 ` Stephen Hemminger
2009-04-27 19:46 ` Linus Torvalds
2009-04-27 19:48 ` Linus Torvalds
2009-04-27 20:36 ` Evgeniy Polyakov
2009-04-27 20:58 ` Linus Torvalds
2009-04-27 21:40 ` Stephen Hemminger
2009-04-27 22:24 ` Linus Torvalds
2009-04-27 23:01 ` Linus Torvalds
2009-04-27 23:03 ` Linus Torvalds
2009-04-28 6:58 ` Eric Dumazet
2009-04-28 11:53 ` David Miller
2009-04-28 12:40 ` Ingo Molnar
2009-04-28 13:43 ` David Miller
2009-04-28 13:52 ` Mathieu Desnoyers [this message]
2009-04-28 14:37 ` David Miller
2009-04-28 14:49 ` Mathieu Desnoyers
2009-04-28 15:00 ` David Miller
2009-04-28 16:24 ` [PATCH] netfilter: revised locking for x_tables Stephen Hemminger
2009-04-28 16:50 ` Linus Torvalds
2009-04-28 16:55 ` Linus Torvalds
2009-04-29 5:37 ` David Miller
[not found] ` <20090428.223708.168741998.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2009-04-30 3:26 ` Jeff Chua
[not found] ` <b6a2187b0904292026k7d6107a7vcdc761d4149f40aa-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-04-30 3:31 ` David Miller
2009-05-01 8:38 ` [PATCH] netfilter: use likely() in xt_info_rdlock_bh() Eric Dumazet
2009-05-01 16:10 ` David Miller
2009-04-28 15:42 ` [PATCH] netfilter: use per-CPU r**ursive lock {XV} Paul E. McKenney
2009-04-28 17:35 ` Christoph Lameter
2009-04-28 15:09 ` Linus Torvalds
2009-04-27 23:32 ` Linus Torvalds
2009-04-28 7:41 ` Peter Zijlstra
2009-04-28 14:22 ` Paul E. McKenney
2009-04-28 7:42 ` Jan Engelhardt
2009-04-26 19:31 ` [PATCH] netfilter: use per-CPU recursive " Mathieu Desnoyers
2009-04-26 20:55 ` Eric Dumazet
2009-04-26 21:39 ` Mathieu Desnoyers
2009-04-21 18:34 ` [PATCH] netfilter: use per-cpu recursive lock (v11) Paul E. McKenney
2009-04-21 20:14 ` Linus Torvalds
2009-04-20 23:44 ` [PATCH] netfilter: use per-cpu recursive lock (v10) Paul E. McKenney
2009-04-16 0:02 ` [PATCH] netfilter: use per-cpu spinlock rather than RCU (v3) Linus Torvalds
2009-04-16 6:26 ` Eric Dumazet
2009-04-16 14:33 ` Paul E. McKenney
2009-04-15 3:23 ` David Miller
2009-04-14 17:19 ` [PATCH] netfilter: use per-cpu spinlock rather than RCU Stephen Hemminger
2009-04-11 15:50 ` iptables very slow after commit 784544739a25c30637397ace5489eeb6e15d7d49 Stephen Hemminger
2009-04-11 17:43 ` Paul E. McKenney
2009-04-11 18:57 ` Linus Torvalds
2009-04-12 0:34 ` Paul E. McKenney
2009-04-12 7:23 ` Evgeniy Polyakov
2009-04-12 16:06 ` Stephen Hemminger
2009-04-12 17:30 ` Paul E. McKenney
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