[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1245843884.6695.54.camel@localhost.localdomain>
Date: Wed, 24 Jun 2009 13:44:44 +0200
From: Jesper Dangaard Brouer <hawk@...x.dk>
To: Chrissie Caulfield <christine.caulfield@...glemail.com>
Cc: "David S. Miller" <davem@...emloft.net>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
dougthompson@...ssion.com, bluesmoke-devel@...ts.sourceforge.net,
axboe@...nel.dk, Patrick McHardy <kaber@...sh.net>,
Trond.Myklebust@...app.com, linux-wireless@...r.kernel.org,
johannes@...solutions.net, yoshfuji@...ux-ipv6.org,
shemminger@...ux-foundation.org, linux-nfs@...r.kernel.org,
bfields@...ldses.org, neilb@...e.de, linux-ext4@...r.kernel.org,
tytso@....edu, adilger@....com, netfilter-devel@...r.kernel.org
Subject: Re: [PATCH 07/10] decnet: Use rcu_barrier() on module unload.
On Wed, 2009-06-24 at 07:23 +0100, Chrissie Caulfield wrote:
> The issues with DECnet module unloading are a little more than just an
> RCU leak I think!
>
> Though that area does need reviewing ... when I get some time.
Fine. Now you have read my comment in the code, then there is a updated
patch below. Will you ack-that?
--
Med venlig hilsen / Best regards
Jesper Brouer
ComX Networks A/S
Linux Network developer
Cand. Scient Datalog / MSc.
Author of http://adsl-optimizer.dk
LinkedIn: http://www.linkedin.com/in/brouer
[PATCH 07/10] decnet: Use rcu_barrier() on module unload.
From: Jesper Dangaard Brouer <hawk@...x.dk>
The decnet module unloading as been disabled with a '#if 0' statement,
because it have had issues.
We add a rcu_barrier() anyhow for correctness.
The maintainer (Chrissie Caulfield) will look into the unload issue
when time permits.
Signed-off-by: Jesper Dangaard Brouer <hawk@...x.dk>
---
net/decnet/af_decnet.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index d351b8d..bff12da 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -2393,6 +2393,10 @@ module_init(decnet_init);
* Prevent DECnet module unloading until its fixed properly.
* Requires an audit of the code to check for memory leaks and
* initialisation problems etc.
+ *
+ * hawk@...x.dk 2009-06-19:
+ * I have added a rcu_barrier() which should plug some of your
+ * module unload issues. Maintainers please try it out...
*/
#if 0
static void __exit decnet_exit(void)
@@ -2413,6 +2417,8 @@ static void __exit decnet_exit(void)
proc_net_remove(&init_net, "decnet");
proto_unregister(&dn_proto);
+
+ rcu_barrier_bh(); /* Wait for completion of call_rcu_bh()'s */
}
module_exit(decnet_exit);
#endif
--
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
Powered by blists - more mailing lists