From: Govindarajulu Varadarajan <gvaradar@cisco.com>
To: netdev@vger.kernel.org, davem@davemloft.net
Cc: benve@cisco.com, Govindarajulu Varadarajan <gvaradar@cisco.com>
Subject: [PATCH net-next] enic: unmask intr only when napi is complete
Date: Mon, 22 May 2017 12:19:48 -0700 [thread overview]
Message-ID: <20170522191948.1397-1-gvaradar@cisco.com> (raw)
In case of busy poll, napi_complete_done returns false and does not
dequeue napi. In this case do not unmask the intr. We are guaranteed
napi is called again. This reduces unnecessary iowrites.
Signed-off-by: Govindarajulu Varadarajan <gvaradar@cisco.com>
---
drivers/net/ethernet/cisco/enic/enic_main.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index 4b87beeabce1..6a9c8878aca0 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -1537,13 +1537,12 @@ static int enic_poll(struct napi_struct *napi, int budget)
*/
enic_calc_int_moderation(enic, &enic->rq[0]);
- if (rq_work_done < rq_work_to_do) {
+ if ((rq_work_done < budget) && napi_complete_done(napi, rq_work_done)) {
/* Some work done, but not enough to stay in polling,
* exit polling
*/
- napi_complete_done(napi, rq_work_done);
if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
enic_set_int_moderation(enic, &enic->rq[0]);
vnic_intr_unmask(&enic->intr[intr]);
@@ -1663,13 +1662,12 @@ static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
*/
enic_calc_int_moderation(enic, &enic->rq[rq]);
- if (work_done < work_to_do) {
+ if ((work_done < budget) && napi_complete_done(napi, work_done)) {
/* Some work done, but not enough to stay in polling,
* exit polling
*/
- napi_complete_done(napi, work_done);
if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
enic_set_int_moderation(enic, &enic->rq[rq]);
vnic_intr_unmask(&enic->intr[intr]);
--
2.13.0
next reply other threads:[~2017-05-22 19:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-22 19:19 Govindarajulu Varadarajan [this message]
2017-05-23 15:06 ` [PATCH net-next] enic: unmask intr only when napi is complete David Miller
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