From mboxrd@z Thu Jan 1 00:00:00 1970 From: Or Gerlitz Subject: Re: [PATCH] IB/mlx4: fix post_recv wq overflow check Date: Tue, 19 Jan 2010 17:48:17 +0200 Message-ID: <4B55D441.5050000@voltaire.com> References: <4B45913C.10405@Voltaire.com> <4B45A2E5.2070301@voltaire.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Roland Dreier Cc: linux-rdma , Jack Morgenstein List-Id: linux-rdma@vger.kernel.org Roland Dreier wrote: > I do think it is quite common to see this WQ overflow check trigger, even for kernel code mmm, why is that common? typically there's a higher layer to which the IB ULP advertises some sort of maximal number of credits (e.g in the SCSI case, iser and srp specify the maximal number of commands in the scsi host template) or the ULP informs a higher layer that no more sends can be done (e.g IPoIB calling netif_stop_queue once it sense that the QP filled, etc). Or. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html