From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dennis Dalessandro Subject: [PATCH 12/12] IB/rdmavt: Fix send scheduling Date: Tue, 12 Apr 2016 10:47:00 -0700 Message-ID: <20160412174658.19295.67100.stgit@scvm10.sc.intel.com> References: <20160412173504.19295.7241.stgit@scvm10.sc.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20160412173504.19295.7241.stgit-9QXIwq+3FY+1XWohqUldA0EOCMrvLtNR@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Mike Marciniszyn , Jubin John List-Id: linux-rdma@vger.kernel.org From: Jubin John call_send is used to determine whether to send immediately or schedule a send for later. The current logic in rdmavt is inverted and has a negative impact on the latency of the hfi1 and qib drivers. Fix this regression by correctly calling send immediately when call_send is set. Reviewed-by: Dennis Dalessandro Reviewed-by: Mike Marciniszyn Signed-off-by: Jubin John --- drivers/infiniband/sw/rdmavt/qp.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/sw/rdmavt/qp.c b/drivers/infiniband/sw/rdmavt/qp.c index bd82a69..a9e3bcc 100644 --- a/drivers/infiniband/sw/rdmavt/qp.c +++ b/drivers/infiniband/sw/rdmavt/qp.c @@ -1637,9 +1637,9 @@ bail: spin_unlock_irqrestore(&qp->s_hlock, flags); if (nreq) { if (call_send) - rdi->driver_f.schedule_send_no_lock(qp); - else rdi->driver_f.do_send(qp); + else + rdi->driver_f.schedule_send_no_lock(qp); } return err; } -- 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