From patchwork Wed Sep 30 10:45:16 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Grall X-Patchwork-Id: 7296481 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D24BF9F1D5 for ; Wed, 30 Sep 2015 10:49:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6B9F92063E for ; Wed, 30 Sep 2015 10:49:33 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7BC042063A for ; Wed, 30 Sep 2015 10:49:32 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZhEvf-0006Xi-GL; Wed, 30 Sep 2015 10:48:07 +0000 Received: from smtp02.citrix.com ([66.165.176.63]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZhEux-0006QY-N3 for linux-arm-kernel@lists.infradead.org; Wed, 30 Sep 2015 10:47:24 +0000 X-IronPort-AV: E=Sophos;i="5.17,611,1437436800"; d="scan'208";a="307062005" From: Julien Grall To: Subject: [PATCH v5 01/22] net/xen-netback: xenvif_gop_frag_copy: move GSO check out of the loop Date: Wed, 30 Sep 2015 11:45:16 +0100 Message-ID: <1443609937-25278-2-git-send-email-julien.grall@citrix.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1443609937-25278-1-git-send-email-julien.grall@citrix.com> References: <1443609937-25278-1-git-send-email-julien.grall@citrix.com> MIME-Version: 1.0 X-DLP: MIA1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150930_034723_962003_3A6FE91B X-CRM114-Status: GOOD ( 11.91 ) X-Spam-Score: -4.2 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Wei Liu , ian.campbell@citrix.com, stefano.stabellini@eu.citrix.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Julien Grall , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The skb doesn't change within the function. Therefore it's only necessary to check if we need GSO once at the beginning. Signed-off-by: Julien Grall Acked-by: Wei Liu --- Cc: Ian Campbell Cc: netdev@vger.kernel.org Changes in v4: - Add Wei's acked Changes in v2: - Patch added --- drivers/net/xen-netback/netback.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index ec98d43..c4e6c02 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -288,6 +288,13 @@ static void xenvif_gop_frag_copy(struct xenvif_queue *queue, struct sk_buff *skb unsigned long bytes; int gso_type = XEN_NETIF_GSO_TYPE_NONE; + if (skb_is_gso(skb)) { + if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) + gso_type = XEN_NETIF_GSO_TYPE_TCPV4; + else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) + gso_type = XEN_NETIF_GSO_TYPE_TCPV6; + } + /* Data must not cross a page boundary. */ BUG_ON(size + offset > PAGE_SIZE<gso_type & SKB_GSO_TCPV4) - gso_type = XEN_NETIF_GSO_TYPE_TCPV4; - else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) - gso_type = XEN_NETIF_GSO_TYPE_TCPV6; - } - if (*head && ((1 << gso_type) & queue->vif->gso_mask)) queue->rx.req_cons++;