From: Jesse Brandeburg This patch undoes a change that we believe will impact performance adversely, by creating possibly too long a delay between servicing completions. The comment pretty much explains it. We need to call both cleanup routines each pass through the loop, this time we have a comment explaining why. Signed-off-by: Jesse Brandeburg Signed-off-by: Andrew Morton --- 25-akpm/drivers/net/ixgb/ixgb_main.c | 13 +++++++------ 1 files changed, 7 insertions(+), 6 deletions(-) diff -puN drivers/net/ixgb/ixgb_main.c~ixgb-fix-ixgb_intr-looping-checks drivers/net/ixgb/ixgb_main.c --- 25/drivers/net/ixgb/ixgb_main.c~ixgb-fix-ixgb_intr-looping-checks Wed Nov 10 16:00:38 2004 +++ 25-akpm/drivers/net/ixgb/ixgb_main.c Wed Nov 10 16:00:38 2004 @@ -1613,13 +1613,14 @@ static irqreturn_t ixgb_intr(int irq, vo __netif_rx_schedule(netdev); } #else - for (i = 0; i < IXGB_MAX_INTR; i++) - if (ixgb_clean_rx_irq(adapter) == FALSE) + /* yes, that is actually a & and it is meant to make sure that + * every pass through this for loop checks both receive and + * transmit queues for completed descriptors, intended to + * avoid starvation issues and assist tx/rx fairness. */ + for(i = 0; i < IXGB_MAX_INTR; i++) + if(!ixgb_clean_rx_irq(adapter) & + !ixgb_clean_tx_irq(adapter)) break; - for (i = 0; i < IXGB_MAX_INTR; i++) - if (ixgb_clean_tx_irq(adapter) == FALSE) - break; - /* if RAIDC:EN == 1 and ICR:RXDMT0 == 1, we need to * set IMS:RXDMT0 to 1 to restart the RBD timer (POLL) */ _