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Add RX quotas to the net device poll() method. This avoids the problem

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of alloc_pkb() exhaustion when e.g. an iSCSI-booted DOS session is left
idle for a long time at the C:\ prompt and builds up a huge packet
backlog.
This commit is contained in:
Michael Brown
2007-01-09 21:47:01 +00:00
parent e822bc2a90
commit c65fae2475
6 changed files with 75 additions and 36 deletions
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5
src/drivers/net/rtl8139.c
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@@ -413,8 +413,9 @@ static int rtl_transmit ( struct net_device *netdev, struct pk_buff *pkb ) {
* Poll for received packets
*
* @v netdev Network device
* @v rx_quota Maximum number of packets to receive
*/
static void rtl_poll ( struct net_device *netdev ) {
static void rtl_poll ( struct net_device *netdev, unsigned int rx_quota ) {
struct rtl8139_nic *rtl = netdev->priv;
unsigned int status;
unsigned int tsad;
@@ -441,7 +442,7 @@ static void rtl_poll ( struct net_device *netdev ) {
}
/* Handle received packets */
while ( ! ( inw ( rtl->ioaddr + ChipCmd ) & RxBufEmpty ) ) {
while ( rx_quota && ! ( inw ( rtl->ioaddr + ChipCmd ) & RxBufEmpty ) ){
rx_status = * ( ( uint16_t * )
( rtl->rx.ring + rtl->rx.offset ) );
rx_len = * ( ( uint16_t * )