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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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25
drivers/s390/net/qeth_main.c
View File

@@ -3654,7 +3654,7 @@ qeth_verify_vlan_dev(struct net_device *dev, struct qeth_card *card)
return rc;
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++){
if (vg->vlan_devices[i] == dev){
if (vlan_group_get_device(vg, i) == dev){
rc = QETH_VLAN_CARD;
break;
}
@@ -5261,7 +5261,7 @@ qeth_free_vlan_addresses4(struct qeth_card *card, unsigned short vid)
QETH_DBF_TEXT(trace, 4, "frvaddr4");
rcu_read_lock();
in_dev = __in_dev_get_rcu(card->vlangrp->vlan_devices[vid]);
in_dev = __in_dev_get_rcu(vlan_group_get_device(card->vlangrp, vid));
if (!in_dev)
goto out;
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
@@ -5288,7 +5288,7 @@ qeth_free_vlan_addresses6(struct qeth_card *card, unsigned short vid)
QETH_DBF_TEXT(trace, 4, "frvaddr6");
in6_dev = in6_dev_get(card->vlangrp->vlan_devices[vid]);
in6_dev = in6_dev_get(vlan_group_get_device(card->vlangrp, vid));
if (!in6_dev)
return;
for (ifa = in6_dev->addr_list; ifa; ifa = ifa->lst_next){
@@ -5360,7 +5360,7 @@ qeth_layer2_process_vlans(struct qeth_card *card, int clear)
if (!card->vlangrp)
return;
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
if (card->vlangrp->vlan_devices[i] == NULL)
if (vlan_group_get_device(card->vlangrp, i) == NULL)
continue;
if (clear)
qeth_layer2_send_setdelvlan(card, i, IPA_CMD_DELVLAN);
@@ -5398,8 +5398,7 @@ qeth_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
spin_lock_irqsave(&card->vlanlock, flags);
/* unregister IP addresses of vlan device */
qeth_free_vlan_addresses(card, vid);
if (card->vlangrp)
card->vlangrp->vlan_devices[vid] = NULL;
vlan_group_set_device(card->vlangrp, vid, NULL);
spin_unlock_irqrestore(&card->vlanlock, flags);
if (card->options.layer2)
qeth_layer2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
@@ -5662,10 +5661,11 @@ qeth_add_vlan_mc(struct qeth_card *card)
vg = card->vlangrp;
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
if (vg->vlan_devices[i] == NULL ||
!(vg->vlan_devices[i]->flags & IFF_UP))
struct net_device *netdev = vlan_group_get_device(vg, i);
if (netdev == NULL ||
!(netdev->flags & IFF_UP))
continue;
in_dev = in_dev_get(vg->vlan_devices[i]);
in_dev = in_dev_get(netdev);
if (!in_dev)
continue;
read_lock(&in_dev->mc_list_lock);
@@ -5749,10 +5749,11 @@ qeth_add_vlan_mc6(struct qeth_card *card)
vg = card->vlangrp;
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
if (vg->vlan_devices[i] == NULL ||
!(vg->vlan_devices[i]->flags & IFF_UP))
struct net_device *netdev = vlan_group_get_device(vg, i);
if (netdev == NULL ||
!(netdev->flags & IFF_UP))
continue;
in_dev = in6_dev_get(vg->vlan_devices[i]);
in_dev = in6_dev_get(netdev);
if (!in_dev)
continue;
read_lock(&in_dev->lock);