From patchwork Tue Aug 18 13:12:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Coly Li X-Patchwork-Id: 262368 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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 74840C433E1 for ; Tue, 18 Aug 2020 13:13:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 559D120786 for ; Tue, 18 Aug 2020 13:13:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726903AbgHRNNn (ORCPT ); Tue, 18 Aug 2020 09:13:43 -0400 Received: from mx2.suse.de ([195.135.220.15]:33628 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726829AbgHRNNf (ORCPT ); Tue, 18 Aug 2020 09:13:35 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 929A8B17F; Tue, 18 Aug 2020 13:13:59 +0000 (UTC) From: Coly Li To: linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, netdev@vger.kernel.org, open-iscsi@googlegroups.com, linux-scsi@vger.kernel.org, ceph-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Coly Li , Vasily Averin , Cong Wang , Mike Christie , Lee Duncan , Chris Leech , Christoph Hellwig , Hannes Reinecke Subject: [PATCH v7 5/6] scsi: libiscsi: use sendpage_ok() in iscsi_tcp_segment_map() Date: Tue, 18 Aug 2020 21:12:26 +0800 Message-Id: <20200818131227.37020-6-colyli@suse.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200818131227.37020-1-colyli@suse.de> References: <20200818131227.37020-1-colyli@suse.de> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org In iscsci driver, iscsi_tcp_segment_map() uses the following code to check whether the page should or not be handled by sendpage: if (!recv && page_count(sg_page(sg)) >= 1 && !PageSlab(sg_page(sg))) The "page_count(sg_page(sg)) >= 1 && !PageSlab(sg_page(sg)" part is to make sure the page can be sent to network layer's zero copy path. This part is exactly what sendpage_ok() does. This patch uses use sendpage_ok() in iscsi_tcp_segment_map() to replace the original open coded checks. Signed-off-by: Coly Li Cc: Vasily Averin Cc: Cong Wang Cc: Mike Christie Cc: Lee Duncan Cc: Chris Leech Cc: Christoph Hellwig Cc: Hannes Reinecke --- drivers/scsi/libiscsi_tcp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/libiscsi_tcp.c b/drivers/scsi/libiscsi_tcp.c index 6ef93c7af954..31cd8487c16e 100644 --- a/drivers/scsi/libiscsi_tcp.c +++ b/drivers/scsi/libiscsi_tcp.c @@ -128,7 +128,7 @@ static void iscsi_tcp_segment_map(struct iscsi_segment *segment, int recv) * coalescing neighboring slab objects into a single frag which * triggers one of hardened usercopy checks. */ - if (!recv && page_count(sg_page(sg)) >= 1 && !PageSlab(sg_page(sg))) + if (!recv && sendpage_ok(sg_page(sg))) return; if (recv) {