svn commit: r303646 - head/sys/ofed/drivers/infiniband/ulp/ipoib

[Gleb Smirnoff]

  Mark,

On Mon, Aug 01, 2016 at 10:22:11PM +0000, Mark Johnston wrote:
M> Author: markj
M> Date: Mon Aug  1 22:22:11 2016
M> New Revision: 303646
M> URL: https://svnweb.freebsd.org/changeset/base/303646
M> 
M> Log:
M>   ipoib: Bound the number of egress mbufs buffered during pathrec lookups.
M>   
M>   In pathological situations where the master subnet manager becomes
M>   unresponsive for an extended period, we may otherwise end up queuing all
M>   of the system's mbufs while waiting for a response to a path record lookup.
M>   
M>   This addresses the same issue as commit 1e85b806f9 in Linux.
M>   
M>   Reviewed by:	cem, ngie
M>   MFC after:	2 weeks
M>   Sponsored by:	EMC / Isilon Storage Division
M> 
M> Modified:
M>   head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c
M> 
M> Modified: head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c
M> ==============================================================================
M> --- head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c	Mon Aug  1 22:19:23 2016	(r303645)
M> +++ head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c	Mon Aug  1 22:22:11 2016	(r303646)
M> @@ -660,7 +660,13 @@ ipoib_unicast_send(struct mbuf *mb, stru
M>  			new_path = 1;
M>  		}
M>  		if (path) {
M> -			_IF_ENQUEUE(&path->queue, mb);
M> +			if (_IF_QLEN(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE)
M> +				_IF_ENQUEUE(&path->queue, mb);
M> +			else {
M> +				if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1);
M> +				m_freem(mb);
M> +			}

Shouldn't that be IFCOUNTER_ODROPS?

-- 
Totus tuus, Glebius.