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authorGovindarajulu Varadarajan <gvaradar@cisco.com>2017-12-21 08:12:28 -0800
committerDavid S. Miller <davem@davemloft.net>2017-12-26 13:10:07 -0500
commit18feb87105c3c16dc01e6981a6aafb175679b997 (patch)
tree6c79c206a17cd37e6ceb048edc2c119076ab461e /drivers/net/ethernet/cisco/enic
parent66364bdf3a7e0470e84590d48fc11d902eca7fa9 (diff)
downloadlinux-18feb87105c3c16dc01e6981a6aafb175679b997.tar.gz
enic: add wq clean up budget
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 <gvaradar@cisco.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cisco/enic')
-rw-r--r--drivers/net/ethernet/cisco/enic/enic.h2
-rw-r--r--drivers/net/ethernet/cisco/enic/enic_main.c4
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;