Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754708AbaAHCMd (ORCPT ); Tue, 7 Jan 2014 21:12:33 -0500 Received: from mail-pb0-f42.google.com ([209.85.160.42]:65171 "EHLO mail-pb0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753750AbaAHCMY (ORCPT ); Tue, 7 Jan 2014 21:12:24 -0500 Message-ID: <1389147141.26646.74.camel@edumazet-glaptop2.roam.corp.google.com> Subject: Re: [PATCH net-next v3 6/9] xen-netback: Handle guests with too many frags From: Eric Dumazet To: Zoltan Kiss Cc: ian.campbell@citrix.com, wei.liu2@citrix.com, xen-devel@lists.xenproject.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, jonathan.davies@citrix.com Date: Tue, 07 Jan 2014 18:12:21 -0800 In-Reply-To: <1389139818-24458-7-git-send-email-zoltan.kiss@citrix.com> References: <1389139818-24458-1-git-send-email-zoltan.kiss@citrix.com> <1389139818-24458-7-git-send-email-zoltan.kiss@citrix.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2014-01-08 at 00:10 +0000, Zoltan Kiss wrote: > > + if (skb_shinfo(skb)->frag_list) { > + nskb = skb_shinfo(skb)->frag_list; > + xenvif_fill_frags(vif, nskb, INVALID_PENDING_IDX); > + skb->len += nskb->len; > + skb->data_len += nskb->len; > + skb->truesize += nskb->truesize; > + skb_shinfo(skb)->tx_flags |= SKBTX_DEV_ZEROCOPY; > + skb_shinfo(nskb)->tx_flags |= SKBTX_DEV_ZEROCOPY; > + vif->tx_zerocopy_sent += 2; > + nskb = skb; > + > + skb = skb_copy_expand(skb, > + 0, > + 0, > + GFP_ATOMIC | __GFP_NOWARN); skb can be NULL here > + skb_shinfo(skb)->destructor_arg = NULL; > + } > if (skb_is_nonlinear(skb) && skb_headlen(skb) < PKT_PROT_LEN) { > int target = min_t(int, skb->len, PKT_PROT_LEN); > __pskb_pull_tail(skb, target - skb_headlen(skb)); > @@ -1568,6 +1660,9 @@ static int xenvif_tx_submit(struct xenvif *vif) > } > -- 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/