diff options
Diffstat (limited to 'net/rds/ib_sysctl.c')
| -rw-r--r-- | net/rds/ib_sysctl.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/net/rds/ib_sysctl.c b/net/rds/ib_sysctl.c index d87830db93a0..84b5ffcb280f 100644 --- a/net/rds/ib_sysctl.c +++ b/net/rds/ib_sysctl.c @@ -53,7 +53,17 @@ unsigned long rds_ib_sysctl_max_unsig_bytes = (16 << 20); static unsigned long rds_ib_sysctl_max_unsig_bytes_min = 1; static unsigned long rds_ib_sysctl_max_unsig_bytes_max = ~0UL; -unsigned int rds_ib_sysctl_flow_control = 1; +/* + * This sysctl does nothing. + * + * Backwards compatibility with RDS 3.0 wire protocol + * disables initial FC credit exchange. + * If it's ever possible to drop 3.0 support, + * setting this to 1 and moving init/refill of send/recv + * rings from ib_cm_connect_complete() back into ib_setup_qp() + * will cause credits to be added before protocol negotiation. + */ +unsigned int rds_ib_sysctl_flow_control = 0; ctl_table rds_ib_sysctl_table[] = { { |