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NTB: memcpy lockup workaround

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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: Jon Mason <jon.mason@intel.com>
This commit is contained in:
Jon Mason 2013-01-17 15:28:45 -07:00
parent c9d534c8cb
commit c336acd333
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GPG key ID: 6E664BAC7A8BD223
1 changed files with 8 additions and 3 deletions
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11
drivers/ntb/ntb_transport.c
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@ -1034,11 +1034,16 @@ static int ntb_process_rxc(struct ntb_transport_qp *qp)
static void ntb_transport_rx(unsigned long 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);
} while (!rc);
if (rc)
break;
}
}
static void ntb_transport_rxc_db(void *data, int db_num)