In case of tx clean up, we set '-1' as budget. This means clean up until
wq is empty or till (1 << 32) pkts are cleaned. Under heavy load this
will run for long time and cause
"watchdog: BUG: soft lockup - CPU#25 stuck for 21s!" warning.
This patch sets wq clean up budget to 256.
Signed-off-by: Govindarajulu Varadarajan <gvara...@cisco.com>
---
drivers/net/ethernet/cisco/enic/enic.h | 2 ++
drivers/net/ethernet/cisco/enic/enic_main.c | 4 ++--
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/cisco/enic/enic.h
b/drivers/net/ethernet/cisco/enic/enic.h
index 6a9527004cb1..9b218f0e5a4c 100644
--- a/drivers/net/ethernet/cisco/enic/enic.h
+++ b/drivers/net/ethernet/cisco/enic/enic.h
@@ -43,6 +43,8 @@
#define ENIC_CQ_MAX (ENIC_WQ_MAX + ENIC_RQ_MAX)
#define ENIC_INTR_MAX (ENIC_CQ_MAX + 2)
+#define ENIC_WQ_NAPI_BUDGET 256
+
#define ENIC_AIC_LARGE_PKT_DIFF 3
struct enic_msix_entry {
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c
b/drivers/net/ethernet/cisco/enic/enic_main.c
index d98676e43e03..f202ba72a811 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -1500,7 +1500,7 @@ static int enic_poll(struct napi_struct *napi, int budget)
unsigned int cq_wq = enic_cq_wq(enic, 0);
unsigned int intr = enic_legacy_io_intr();
unsigned int rq_work_to_do = budget;
- unsigned int wq_work_to_do = -1; /* no limit */
+ unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET;
unsigned int work_done, rq_work_done = 0, wq_work_done;
int err;
@@ -1598,7 +1598,7 @@ static int enic_poll_msix_wq(struct napi_struct *napi,
int budget)
struct vnic_wq *wq = &enic->wq[wq_index];
unsigned int cq;
unsigned int intr;
- unsigned int wq_work_to_do = -1; /* clean all desc possible */
+ unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET;
unsigned int wq_work_done;
unsigned int wq_irq;
--
2.15.1
