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[VLAN]: Avoid a 4-order allocation.

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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>
This commit is contained in:
Dan Aloni
2007-03-02 20:44:51 -08:00
committed by David S. Miller
parent b5284e5aa9
commit 5c15bdec5c
22 changed files with 102 additions and 80 deletions
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drivers/net/starfire.c
+2 -3
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@@ -677,8 +677,7 @@ static void netdev_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
spin_lock(&np->lock);
if (debug > 1)
printk("%s: removing vlanid %d from vlan filter\n", dev->name, vid);
if (np->vlgrp)
np->vlgrp->vlan_devices[vid] = NULL;
vlan_group_set_device(np->vlgrp, vid, NULL);
set_rx_mode(dev);
spin_unlock(&np->lock);
}
@@ -1738,7 +1737,7 @@ static void set_rx_mode(struct net_device *dev)
int vlan_count = 0;
void __iomem *filter_addr = ioaddr + HashTable + 8;
for (i = 0; i < VLAN_VID_MASK; i++) {
if (np->vlgrp->vlan_devices[i]) {
if (vlan_group_get_device(np->vlgrp, i)) {
if (vlan_count >= 32)
break;
writew(cpu_to_be16(i), filter_addr);