From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: [PATCH net-next] Revert "net: init sk_cookie for inet socket" Date: Tue, 24 Apr 2018 08:49:42 -0700 Message-ID: <26914c29-d248-5197-9e3c-fc44a1f5a1a8@gmail.com> References: <1524571537-9781-1-git-send-email-laoar.shao@gmail.com> <29dbd735-5fd7-d4e4-288f-220f2075b645@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: David Miller , netdev@vger.kernel.org To: Yafang Shao , Eric Dumazet Return-path: Received: from mail-pf0-f195.google.com ([209.85.192.195]:44386 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750842AbeDXPto (ORCPT ); Tue, 24 Apr 2018 11:49:44 -0400 Received: by mail-pf0-f195.google.com with SMTP id p15so12595732pff.11 for ; Tue, 24 Apr 2018 08:49:44 -0700 (PDT) In-Reply-To: Content-Language: en-US Sender: netdev-owner@vger.kernel.org List-ID: On 04/24/2018 08:12 AM, Yafang Shao wrote: > On Tue, Apr 24, 2018 at 8:38 PM, Eric Dumazet wrote: >> >> >> On 04/24/2018 05:05 AM, Yafang Shao wrote: >>> This revert commit ("net: init sk_cookie for inet socket") >>> >>> Per discussion with Eric. >>> >> >> I suggest you include a bit more details, about cache line false sharing. >> > > Coud we adjust the struct common to avoid such kind of cache line > false sharing ? > I mean removing "atomic64_t skc_cookie;" from struct sock_common and > place it in struct inet_sock ? The false sharing is not there, it is on net->cookie_gen