From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5AB1FC432C0 for ; Fri, 22 Nov 2019 03:45:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 377DB20704 for ; Fri, 22 Nov 2019 03:45:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726690AbfKVDpZ (ORCPT ); Thu, 21 Nov 2019 22:45:25 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:6699 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726343AbfKVDpY (ORCPT ); Thu, 21 Nov 2019 22:45:24 -0500 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id C054EA336454F4F117DE; Fri, 22 Nov 2019 11:45:22 +0800 (CST) Received: from [127.0.0.1] (10.177.223.23) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.439.0; Fri, 22 Nov 2019 11:45:17 +0800 Subject: Re: [RESEND PATCH v4 00/10] Rework REFCOUNT_FULL using atomic_fetch_* operations To: Will Deacon , CC: Kees Cook , Ingo Molnar , "Elena Reshetova" , Peter Zijlstra , Ard Biesheuvel References: <20191121115902.2551-1-will@kernel.org> From: Hanjun Guo Message-ID: <2d008348-e000-0627-132f-7fc8990de3a4@huawei.com> Date: Fri, 22 Nov 2019 11:44:55 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 MIME-Version: 1.0 In-Reply-To: <20191121115902.2551-1-will@kernel.org> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.223.23] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019/11/21 19:58, Will Deacon wrote: > Hi everybody, > > This is a resend of version four of the patches I posted here: > > v4: https://lore.kernel.org/lkml/20191030143035.19440-1-will@kernel.org > > Previous versions can be found at: > > v1: https://lkml.kernel.org/r/20190802101000.12958-1-will@kernel.org > v2: https://lkml.kernel.org/r/20190827163204.29903-1-will@kernel.org > v3: https://lkml.kernel.org/r/20191007154703.5574-1-will@kernel.org > > I didn't receive any feedback last time around, other than some positive > noises from Kees, so please consider this for inclusion in mainline. This time I tested this patch set on both ARM64 and x86 server, against 5.4-rc8. On ARM64, similar test case and the similar performance improvement. On X86, I tested on a 24 cores Xeon(R) CPU E5-2620, with kernel compile (make -j) for test case, and no issue was found. Tested-by: Hanjun Guo Thanks Hanjun