From: Dwip N. Banerjee Date: Thu, 19 Nov 2020 01:12:25 +0000 (-0600) Subject: ibmvnic: Do not replenish RX buffers after every polling loop X-Git-Tag: v5.11-rc1~169^2~198^2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=41ed0a00ffcd903ece4304a4a65d95706115ffcb;p=thirdparty%2Fkernel%2Flinux.git ibmvnic: Do not replenish RX buffers after every polling loop Reduce the amount of time spent replenishing RX buffers by only doing so once available buffers has fallen under a certain threshold, in this case half of the total number of buffers, or if the polling loop exits before the packets processed is less than its budget. Non-exhaustion of NAPI budget implies lower incoming packet pressure, allowing the leeway to refill the buffers in preparation for any impending burst. Signed-off-by: Dwip N. Banerjee Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 96df6d8fa2777..9fe43ab0496db 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -2537,7 +2537,10 @@ restart_poll: frames_processed++; } - if (adapter->state != VNIC_CLOSING) + if (adapter->state != VNIC_CLOSING && + ((atomic_read(&adapter->rx_pool[scrq_num].available) < + adapter->req_rx_add_entries_per_subcrq / 2) || + frames_processed < budget)) replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); if (frames_processed < budget) { if (napi_complete_done(napi, frames_processed)) {