Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753406AbaBYVwr (ORCPT ); Tue, 25 Feb 2014 16:52:47 -0500 Received: from mail-pb0-f47.google.com ([209.85.160.47]:58426 "EHLO mail-pb0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752259AbaBYVwp (ORCPT ); Tue, 25 Feb 2014 16:52:45 -0500 MIME-Version: 1.0 In-Reply-To: References: Date: Tue, 25 Feb 2014 23:52:45 +0200 Message-ID: Subject: Re: [PATCH] mlx4: Use GFP_NOFS calls during the ipoib TX path when creating the QP From: Or Gerlitz To: Jiri Kosina Cc: Roland Dreier , Amir Vadai , Eli Cohen , Or Gerlitz , Eugenia Emantayev , "David S. Miller" , Mel Gorman , "netdev@vger.kernel.org" , linux-kernel Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 21, 2014 at 11:53 PM, Jiri Kosina wrote: >> >> This was originally a patch from Matthew Finlay that >> addressed a problem whereby NFS writes would enter uninterruptible sleep >> forever. The issue happened when using NFS over IPoIB. This is not a >> recommended configuration as RDMA is preferred but it is still a valid >> configuration and is important to have in situations where the NFS server >> does not support RDMA. The problem encountered was described as follows: >> . And what happens if you use IPoIB datagram mode, is/why the patch is needed there? Also the patch uses a new QP creatiob flag IB_QP_CREATE_USE_GFP_NOFS but it doesn't touch include/rdma/ib_verbs.h nor I see this flag defined anywhere on the patch, does it compile? how? -- 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/