[VLAN]: Avoid a 4-order allocation.

This patch splits the vlan_group struct into a multi-allocated struct. On
x86_64, the size of the original struct is a little more than 32KB, causing
a 4-order allocation, which is prune to problems caused by buddy-system
external fragmentation conditions.

I couldn't just use vmalloc() because vfree() cannot be called in the
softirq context of the RCU callback.

Signed-off-by: Dan Aloni <da-x@monatomic.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 26c6ac48288c..8c8f9f4d47a5 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -9114,8 +9114,7 @@ static void tg3_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
                 tg3_netif_stop(tp);
 
         tg3_full_lock(tp, 0);
-        if (tp->vlgrp)
-                tp->vlgrp->vlan_devices[vid] = NULL;
+        vlan_group_set_device(tp->vlgrp, vid, NULL);
         tg3_full_unlock(tp);
 
         if (netif_running(dev))