From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f71.google.com (mail-pg0-f71.google.com [74.125.83.71]) by kanga.kvack.org (Postfix) with ESMTP id 26D866B025E for ; Mon, 6 Nov 2017 20:05:47 -0500 (EST) Received: by mail-pg0-f71.google.com with SMTP id l23so14688722pgc.10 for ; Mon, 06 Nov 2017 17:05:47 -0800 (PST) Received: from mga04.intel.com (mga04.intel.com. [192.55.52.120]) by mx.google.com with ESMTPS id x18si33783pge.118.2017.11.06.17.05.45 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 06 Nov 2017 17:05:46 -0800 (PST) Subject: [PATCH 2/3] IB/core: disable memory registration of fileystem-dax vmas From: Dan Williams Date: Mon, 06 Nov 2017 16:57:21 -0800 Message-ID: <151001624138.16354.16836728315400060928.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <151001623063.16354.14661493921524115663.stgit@dwillia2-desk3.amr.corp.intel.com> References: <151001623063.16354.14661493921524115663.stgit@dwillia2-desk3.amr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org Cc: linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, Jeff Moyer , stable@vger.kernel.org, Christoph Hellwig , Jason Gunthorpe , linux-mm@kvack.org, Doug Ledford , Ross Zwisler , Sean Hefty , Hal Rosenstock 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: Reported-by: Christoph Hellwig Signed-off-by: Dan Williams --- drivers/infiniband/core/umem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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); -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org