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[68.61.232.219]) by smtp.gmail.com with ESMTPSA id v21sm5340430ios.42.2018.12.17.08.40.31 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Dec 2018 08:40:31 -0800 (PST) Received: from manet.1015granger.net (manet.1015granger.net [192.168.1.51]) by gateway.1015granger.net (8.14.7/8.14.7) with ESMTP id wBHGeULW018617; Mon, 17 Dec 2018 16:40:30 GMT Subject: [PATCH v4 13/30] xprtrdma: Recognize XDRBUF_SPARSE_PAGES From: Chuck Lever To: linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org Date: Mon, 17 Dec 2018 11:40:30 -0500 Message-ID: <20181217164030.24133.8079.stgit@manet.1015granger.net> In-Reply-To: <20181217162406.24133.27356.stgit@manet.1015granger.net> References: <20181217162406.24133.27356.stgit@manet.1015granger.net> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Commit 431f6eb3570f ("SUNRPC: Add a label for RPC calls that require allocation on receive") didn't update similar logic in rpc_rdma.c. I don't think this is a bug, per-se; the commit just adds more careful checking for broken upper layer behavior. Signed-off-by: Chuck Lever --- net/sunrpc/xprtrdma/rpc_rdma.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index 3804fb3..939f84a 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -218,11 +218,12 @@ static bool rpcrdma_results_inline(struct rpcrdma_xprt *r_xprt, ppages = xdrbuf->pages + (xdrbuf->page_base >> PAGE_SHIFT); page_base = offset_in_page(xdrbuf->page_base); while (len) { - if (unlikely(!*ppages)) { - /* XXX: Certain upper layer operations do - * not provide receive buffer pages. - */ - *ppages = alloc_page(GFP_ATOMIC); + /* ACL likes to be lazy in allocating pages - ACLs + * are small by default but can get huge. + */ + if (unlikely(xdrbuf->flags & XDRBUF_SPARSE_PAGES)) { + if (!*ppages) + *ppages = alloc_page(GFP_ATOMIC); if (!*ppages) return -ENOBUFS; }