From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f70.google.com (mail-pg0-f70.google.com [74.125.83.70]) by kanga.kvack.org (Postfix) with ESMTP id 333A46B025F for ; Wed, 29 Nov 2017 13:14:08 -0500 (EST) Received: by mail-pg0-f70.google.com with SMTP id a10so2602584pgq.3 for ; Wed, 29 Nov 2017 10:14:08 -0800 (PST) Received: from mga11.intel.com (mga11.intel.com. [192.55.52.93]) by mx.google.com with ESMTPS id 3si1623973plv.303.2017.11.29.10.14.06 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 29 Nov 2017 10:14:07 -0800 (PST) Subject: [PATCH v3 4/4] IB/core: disable memory registration of fileystem-dax vmas From: Dan Williams 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> 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-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 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 --- 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