From patchwork Wed Nov 29 18:05:51 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 10083155 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 27ADB60311 for ; Wed, 29 Nov 2017 18:14:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 21C0428574 for ; Wed, 29 Nov 2017 18:14:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 15A9129A17; Wed, 29 Nov 2017 18:14:51 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C0BA728574 for ; Wed, 29 Nov 2017 18:14:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753160AbdK2SOK (ORCPT ); Wed, 29 Nov 2017 13:14:10 -0500 Received: from mga02.intel.com ([134.134.136.20]:27470 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753050AbdK2SOH (ORCPT ); Wed, 29 Nov 2017 13:14:07 -0500 Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Nov 2017 10:14:07 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,338,1508828400"; d="scan'208";a="181658569" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.16]) by fmsmga005.fm.intel.com with ESMTP; 29 Nov 2017 10:14:05 -0800 Subject: [PATCH v3 4/4] IB/core: disable memory registration of fileystem-dax vmas From: Dan Williams To: akpm@linux-foundation.org Cc: linux-nvdimm@lists.01.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, Jeff Moyer , stable@vger.kernel.org, hch@lst.de, Jason Gunthorpe , linux-mm@kvack.org, Doug Ledford , Ross Zwisler , Sean Hefty , Hal Rosenstock Date: Wed, 29 Nov 2017 10:05:51 -0800 Message-ID: <151197875158.26211.7203330105253426435.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <151197872943.26211.6551382719053304996.stgit@dwillia2-desk3.amr.corp.intel.com> References: <151197872943.26211.6551382719053304996.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-9-g687f MIME-Version: 1.0 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Until there is a solution to the dma-to-dax vs truncate problem it is not safe to allow RDMA to create long standing memory registrations against filesytem-dax vmas. Cc: Sean Hefty Cc: Doug Ledford Cc: Hal Rosenstock Cc: Jeff Moyer Cc: Ross Zwisler Cc: Jason Gunthorpe Cc: Cc: Fixes: 3565fce3a659 ("mm, x86: get_user_pages() for dax mappings") Reported-by: Christoph Hellwig Reviewed-by: Christoph Hellwig Signed-off-by: Dan Williams Acked-by: Jason Gunthorpe --- drivers/infiniband/core/umem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index 21e60b1e2ff4..130606c3b07c 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -191,7 +191,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, sg_list_start = umem->sg_head.sgl; while (npages) { - ret = get_user_pages(cur_base, + ret = get_user_pages_longterm(cur_base, min_t(unsigned long, npages, PAGE_SIZE / sizeof (struct page *)), gup_flags, page_list, vma_list);