Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946027AbbHGQuA (ORCPT ); Fri, 7 Aug 2015 12:50:00 -0400 Received: from smtp.citrix.com ([66.165.176.89]:28314 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932544AbbHGQsM (ORCPT ); Fri, 7 Aug 2015 12:48:12 -0400 X-IronPort-AV: E=Sophos;i="5.15,630,1432598400"; d="scan'208";a="289168423" From: Julien Grall To: CC: , , , , "Julien Grall" , Wei Liu , Subject: [PATCH v3 01/20] net/xen-netback: xenvif_gop_frag_copy: move GSO check out of the loop Date: Fri, 7 Aug 2015 17:46:40 +0100 Message-ID: <1438966019-19322-2-git-send-email-julien.grall@citrix.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1438966019-19322-1-git-send-email-julien.grall@citrix.com> References: <1438966019-19322-1-git-send-email-julien.grall@citrix.com> MIME-Version: 1.0 Content-Type: text/plain X-DLP: MIA2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1842 Lines: 56 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 --- Cc: Ian Campbell Cc: Wei Liu Cc: netdev@vger.kernel.org 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 8293374..66f1780 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -277,6 +277,13 @@ 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++; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/