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Commit 18feb871 authored by Govindarajulu Varadarajan's avatar Govindarajulu Varadarajan Committed by David S. Miller
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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: default avatarGovindarajulu Varadarajan <gvaradar@cisco.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 66364bdf

drivers/net/ethernet/cisco/enic/enic.h

+2 −0
Original line number Diff line number Diff line
@@ -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 {

drivers/net/ethernet/cisco/enic/enic_main.c

+2 −2
Original line number Diff line number Diff line
@@ -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;