[PATCH] make netns cleanup to run in a separate workq

[Daniel Lezcano <dlezcano-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>]

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Subject: make netns cleanup to run in a separate queue
From: Benjamin Thery

Signed-off-by: Daniel Lezcano <dlezcano-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>
Signed-off-by: Benjamin Thery <benjamin.thery-6ktuUTfB/bM@public.gmane.org>
---
 net/core/net_namespace.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

Index: linux-2.6-netns/net/core/net_namespace.c
===================================================================
--- linux-2.6-netns.orig/net/core/net_namespace.c
+++ linux-2.6-netns/net/core/net_namespace.c
@@ -14,6 +14,7 @@
 static LIST_HEAD(pernet_list);
 static struct list_head *first_device = &pernet_list;
 static DEFINE_MUTEX(net_mutex);
+static struct workqueue_struct *netns_wq;
 
 LIST_HEAD(net_namespace_list);
 
@@ -149,7 +150,7 @@ void __put_net(struct net *net)
 {
 	/* Cleanup the network namespace in process context */
 	INIT_WORK(&net->work, cleanup_net);
-	schedule_work(&net->work);
+	queue_work(netns_wq, &net->work);
 }
 EXPORT_SYMBOL_GPL(__put_net);
 
@@ -172,6 +173,12 @@ static int __init net_ns_init(void)
 					SMP_CACHE_BYTES,
 					SLAB_PANIC, NULL);
 #endif
+
+	/* Create workqueue for cleanup */
+	netns_wq = create_singlethread_workqueue("netns");
+	if (!netns_wq)
+		panic("Could not create netns cleaner");
+
 	mutex_lock(&net_mutex);
 	err = setup_net(&init_net);
 

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