From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD0E3C433E0 for ; Mon, 18 May 2020 07:16:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 965022070A for ; Mon, 18 May 2020 07:16:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="vDIHbt9/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726489AbgERHQb (ORCPT ); Mon, 18 May 2020 03:16:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46300 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726127AbgERHQa (ORCPT ); Mon, 18 May 2020 03:16:30 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA661C061A0C for ; Mon, 18 May 2020 00:16:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Transfer-Encoding :Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description; bh=MDfmhUSEN6T1GWC2JS9ETQihJaCCpQUmpR95XbCnZog=; b=vDIHbt9/FFHQvvtrqu3ceP744/ Et419wdtoBJPRcro8nFtvRPYBmkyQG22n2DUH8NH789eQAaTxxxk2tzDnEn9mKogm+WOXTzL1ceeg J7sngmxcB+y8vd1scCObbJSJP6dJyep3tyg84z4nE4hNrMmPfPOR5jRSam/uX+ZkCilMHORn17oC+ RzV2Vu2c4pF1zLEwJPQmIMIYWKX6PGrE2gLD1aV1UMfPw6r53H/Vn+8vqV473mmu5C5ppDPQRLQHR zfBlHJep6mflKx+V3D79oSl4LpKQnovmJ0IH5CMO/JjxO3k4r/2A1X50sWu5UYwfOdXfsbOqHgbYf gcjaAb+Q==; Received: from hch by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jaa0f-0000Jo-0n; Mon, 18 May 2020 07:16:25 +0000 Date: Mon, 18 May 2020 00:16:24 -0700 From: Christoph Hellwig To: Sagi Grimberg Cc: Alexey Lyashkov , Max Gurtovoy , Bart Van Assche , Leon Romanovsky , Israel Rukshin , sagi@grimberg.me, jgg@mellanox.com, linux-rdma@vger.kernel.org, dledford@redhat.com, sergeygo@mellanox.com Subject: Re: [PATCH] IB/iser: Remove support for FMR memory registration Message-ID: <20200518071624.GA20312@infradead.org> References: <1589299739-16570-1-git-send-email-israelr@mellanox.com> <20200512171633.GO4814@unreal> <5b8b0b51-83e3-06c2-9b99-dec0862c0e5b@acm.org> <49391e02-803b-f705-b00e-e48efd278759@mellanox.com> <0C22D41B-89CD-4B2D-B514-8EA06F2233D7@cloudlinux.com> <9fe7ac28-4702-d537-a568-c3eb0b5b0ce3@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <9fe7ac28-4702-d537-a568-c3eb0b5b0ce3@gmail.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On Sun, May 17, 2020 at 01:35:33AM -0700, Sagi Grimberg wrote: > > > On 5/14/20 3:09 AM, Alexey Lyashkov wrote: > > CX3 with fast registration isn’t stable enough. > > I was make this change for Lustre for year or two ago, but it was > > reverted by serious bugs. > > This must be issues with the Lustre implementation, all the rest of the ULPs > (almost) default > to FRWR. And even if it wasn't out of tree junk like Lustre simply doesn't matter for upstream decisions.