From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Wise Subject: Re: [PATCH] IB/core: Don't drain the receive queue for srq attached queue-pair Date: Tue, 26 Apr 2016 11:00:04 -0500 Message-ID: <571F9084.2040506@opengridcomputing.com> References: <1461682538-19647-1-git-send-email-sagi@grimberg.me> <571F841D.3010909@opengridcomputing.com> <20160426154328.GA12398@lst.de> <912C9E71-05E3-4ED9-9B41-137E131E3A71@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <912C9E71-05E3-4ED9-9B41-137E131E3A71-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Chuck Lever , Christoph Hellwig Cc: sagi grimberg , "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" List-Id: linux-rdma@vger.kernel.org On 4/26/2016 10:55 AM, Chuck Lever wrote: > >> On Apr 26, 2016, at 11:43 AM, Christoph Hellwig wrote: >> >> Just curious: what takes care of draining SRQs when we unregister them >> after all queues are gone? > > Conversely, I would think that a consumer that uses SRQ > would want a similar drain mechanism to guarantee there > are no more posted Receives for the associated QP, and > thus it is safe to destroy it. I don't think there is anything now that handles draining an SRQ, nor ensuring a QP's RQEs are completed/consumed from its SRQ when draining the QP. Sounds like work is needed here. But are there any kernel SRQ consumers at this point? Steve. -- 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