lkml.org 
[lkml]   [2007]   [Sep]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [ofa-general] [PATCH] RDMA/CMA: Use neigh_event_send() to initiate neighbour discovery.
Steve Wise wrote:
> RDMA/CMA: Use neigh_event_send() to initiate neighbour discovery.
>
> Calling arp_send() to initiate neighbour discovery (ND) doesn't do the
> full ND protocol. Namely, it doesn't handle retransmitting the arp
> request if it is dropped. The function neigh_event_send() does all this.
> Without doing full ND, rdma address resolution fails in the presence of
> dropped arp bcast packets.

Jay,

Is there a way to deploy something similar for the gratuitous arp being
sent by the bonding driver at bond_arp_send()?

We have seen rare situations where the skb was dropped by the stack and
hence bonding fail-over was detected by the remote peer only when its
neighboring subsystem probe failures dictated that a new arp must be issued.

Or.
>
> Signed-off-by: Steve Wise <swise@opengridcomputing.com>
> ---
>
> drivers/infiniband/core/addr.c | 3 +--
> 1 files changed, 1 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
> index c5c33d3..5381c80 100644
> --- a/drivers/infiniband/core/addr.c
> +++ b/drivers/infiniband/core/addr.c
> @@ -161,8 +161,7 @@ static void addr_send_arp(struct sockadd
> if (ip_route_output_key(&rt, &fl))
> return;
>
> - arp_send(ARPOP_REQUEST, ETH_P_ARP, rt->rt_gateway, rt->idev->dev,
> - rt->rt_src, NULL, rt->idev->dev->dev_addr, NULL);
> + neigh_event_send(rt->u.dst.neighbour, NULL);
> ip_rt_put(rt);
> }

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-09-16 09:53    [W:0.128 / U:0.456 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site