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Unverified Commit c336acd3 authored by Jon Mason's avatar Jon Mason
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NTB: memcpy lockup workaround 



The system will appear to lockup for long periods of time due to the NTB
driver spending too much time in memcpy.  Avoid this by reducing the
number of packets that can be serviced on a given interrupt.

Signed-off-by: default avatarJon Mason <jon.mason@intel.com>
parent c9d534c8

drivers/ntb/ntb_transport.c

+8 −3
Original line number Original line Diff line number Diff line
@@ -1034,11 +1034,16 @@ static int ntb_process_rxc(struct ntb_transport_qp *qp) 
static void ntb_transport_rx(unsigned long data)

static void ntb_transport_rx(unsigned long data)

{

{

	struct ntb_transport_qp *qp = (struct ntb_transport_qp *)data;

	struct ntb_transport_qp *qp = (struct ntb_transport_qp *)data;

	int rc;

	int rc, i;





	do {

	/* Limit the number of packets processed in a single interrupt to

	 * provide fairness to others

	 */

	for (i = 0; i < qp->rx_max_entry; i++) {

		rc = ntb_process_rxc(qp);

		rc = ntb_process_rxc(qp);

	} while (!rc);

		if (rc)

			break;

	}

}

}





static void ntb_transport_rxc_db(void *data, int db_num)

static void ntb_transport_rxc_db(void *data, int db_num)