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be2net: replenish when posting to rx-queue is starved in out of mem conditions 

This is a patch to replenish the rx-queue when it is in a starved
state (due to out-of-mem conditions)

Signed-off-by: Sathya Perla <sathyap@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sathya Perla 2009-03-19 23:56:20 -07:00 committed by David S. Miller
parent 170ebf8516
commit ea1dae11e0
2 changed files with 30 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/benet/be.h
View File

@ -194,6 +194,7 @@ struct be_adapter {
struct be_eq_obj rx_eq;
struct be_rx_obj rx_obj;
u32 big_page_size; /* Compounded page size shared by rx wrbs */
bool rx_post_starved; /* Zero rx frags have been posted to BE */
struct vlan_group *vlan_grp;
u16 num_vlans;

50
drivers/net/benet/be_main.c
View File

@ -273,26 +273,6 @@ static void be_rx_eqd_update(struct be_adapter *adapter)
rx_eq->cur_eqd = eqd;
}
static void be_worker(struct work_struct *work)
{
struct be_adapter *adapter =
container_of(work, struct be_adapter, work.work);
int status;
/* Check link */
be_link_status_update(adapter);
/* Get Stats */
status = be_cmd_get_stats(&adapter->ctrl, &adapter->stats.cmd);
if (!status)
netdev_stats_update(adapter);
/* Set EQ delay */
be_rx_eqd_update(adapter);
schedule_delayed_work(&adapter->work, msecs_to_jiffies(1000));
}
static struct net_device_stats *be_get_stats(struct net_device *dev)
{
struct be_adapter *adapter = netdev_priv(dev);
@ -900,8 +880,11 @@ static void be_post_rx_frags(struct be_adapter *adapter)
page_info->last_page_user = true;
if (posted) {
be_rxq_notify(&adapter->ctrl, rxq->id, posted);
atomic_add(posted, &rxq->used);
be_rxq_notify(&adapter->ctrl, rxq->id, posted);
} else if (atomic_read(&rxq->used) == 0) {
/* Let be_worker replenish when memory is available */
adapter->rx_post_starved = true;
}
return;
@ -1305,6 +1288,31 @@ int be_poll_tx(struct napi_struct *napi, int budget)
return 1;
}
static void be_worker(struct work_struct *work)
{
struct be_adapter *adapter =
container_of(work, struct be_adapter, work.work);
int status;
/* Check link */
be_link_status_update(adapter);
/* Get Stats */
status = be_cmd_get_stats(&adapter->ctrl, &adapter->stats.cmd);
if (!status)
netdev_stats_update(adapter);
/* Set EQ delay */
be_rx_eqd_update(adapter);
if (adapter->rx_post_starved) {
adapter->rx_post_starved = false;
be_post_rx_frags(adapter);
}
schedule_delayed_work(&adapter->work, msecs_to_jiffies(1000));
}
static void be_msix_enable(struct be_adapter *adapter)
{
int i, status;