From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753502AbdIEV04 (ORCPT ); Tue, 5 Sep 2017 17:26:56 -0400 Received: from shards.monkeyblade.net ([184.105.139.130]:39352 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753139AbdIEV0w (ORCPT ); Tue, 5 Sep 2017 17:26:52 -0400 Date: Tue, 05 Sep 2017 14:26:51 -0700 (PDT) Message-Id: <20170905.142651.2109065087625525085.davem@davemloft.net> To: jasowang@redhat.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, mst@redhat.com, kubakici@wp.pl Subject: Re: [PATCH net-next 1/2] tun: reserve extra headroom only when XDP is set From: David Miller In-Reply-To: <1504496169-31190-1-git-send-email-jasowang@redhat.com> References: <1504496169-31190-1-git-send-email-jasowang@redhat.com> X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Tue, 05 Sep 2017 14:26:52 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jason Wang Date: Mon, 4 Sep 2017 11:36:08 +0800 > We reserve headroom unconditionally which could cause unnecessary > stress on socket memory accounting because of increased trusesize. Fix > this by only reserve extra headroom when XDP is set. > > Cc: Jakub Kicinski > Signed-off-by: Jason Wang Applied.