Received: by 2002:a05:6a10:17d3:0:0:0:0 with SMTP id hz19csp137100pxb; Wed, 14 Apr 2021 11:14:42 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyB8Y3WVbrGIj4P3ZGWEDRKIZ13PjVagyTfr3lVK2D/yB21Ew5PVCc/xQeeSE7yiCsnhJZ3 X-Received: by 2002:a63:f008:: with SMTP id k8mr38667836pgh.15.1618424082195; Wed, 14 Apr 2021 11:14:42 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1618424082; cv=none; d=google.com; s=arc-20160816; b=wOqxAFdZy09XvxERq0Cft2OgQoVFQCrhgbUsZ1I7kR8KzX0ikKMOZGVjOp/3SrqAU+ gc8x9S3xk4O8uwd2heCSI2bBXAnE1Lgdd3Rz6s2XRNaIm7cL0sVZwnUI7QJAwPyk2eJP wfOKOWdujChkUOjd5B6jhQwEZQZy+w2j/PiCplPU+Xqsv/Wsk5fA5ZVK4xN1G9EkS0Pk z3NJRdOwUW6GTzV9Ocx9RPyOuvg5icoMjoeuq/OFJOJHdmLMQwY/s4d761FJV/9yY/Up TS3nWvfBdwJbEUY1Gf2E2rtyVs673QDeMSXJ8ZM5q0XoMPSt89HyUib47uYhmdqzwxCz JNFw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:ironport-sdr :ironport-sdr; bh=j6CXUfpO3INEvcM1+y6KBMTeuaRI92q0iLrsavKuwVw=; b=MYtOj0f5Ncs2Xtg1gxBxr2rksi/FqCb7iGbtexzcKu0E0hMgNPpXLipzTT5MnwEtOs +Jh7s1wUGcOPt+8yLxjpBqfCsWENGelUR3CIHCHX2U4lPZ6LE9JIOZ1X4KjWzQKMa3Ss j+3aX89DILZy7jpA37SSmJV9LM1Lj+BL2RIhqWczd7OyQdYdlnjhv6bzDB4SmwdKMmuV PL/hHeAXTbILw7bKYaqEAFvfFh01NRmplZC44bUphqKv1nx6F/g3jC+4Xgooy0XPZr2K gMMN2oj4EqdxBbx7SUepzw42rpqvtB/bMbRdbQWxTP5Gptzi6NfECgDGDqqerVwtahpm yFYw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id il12si302954pjb.87.2021.04.14.11.14.30; Wed, 14 Apr 2021 11:14:42 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350243AbhDNR02 (ORCPT + 99 others); Wed, 14 Apr 2021 13:26:28 -0400 Received: from mga09.intel.com ([134.134.136.24]:47069 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234215AbhDNR01 (ORCPT ); Wed, 14 Apr 2021 13:26:27 -0400 IronPort-SDR: gGPiRgeYxKTu8ZDXfrkypIS182dZKfqBeTGCvKhvNHUp5H9Q2gsEDvUwTxmeC0URdGxtyJosfY JEZoTv13UOhg== X-IronPort-AV: E=McAfee;i="6200,9189,9954"; a="194799797" X-IronPort-AV: E=Sophos;i="5.82,222,1613462400"; d="scan'208";a="194799797" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2021 10:26:05 -0700 IronPort-SDR: aCgK6sJ6v3Sd9JwBKp2NvJfbWrjZ03o3vlE6FpkJ3IC5d9jYjwIBCCIuKlRQYoMYNH81qdJ5CV qTbLp4TDfmGg== X-IronPort-AV: E=Sophos;i="5.82,222,1613462400"; d="scan'208";a="522065580" Received: from tassilo.jf.intel.com ([10.54.74.11]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2021 10:26:03 -0700 Date: Wed, 14 Apr 2021 10:26:02 -0700 From: Andi Kleen To: Waiman Long Cc: Alex Kogan , linux@armlinux.org.uk, Peter Zijlstra , Ingo Molnar , will.deacon@arm.com, arnd@arndb.de, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, bp@alien8.de, hpa@zytor.com, x86@kernel.org, guohanjun@huawei.com, jglauber@marvell.com, steven.sistare@oracle.com, daniel.m.jordan@oracle.com, dave.dice@oracle.com Subject: Re: [External] : Re: [PATCH v14 4/6] locking/qspinlock: Introduce starvation avoidance into CNA Message-ID: <20210414172602.GW3762101@tassilo.jf.intel.com> References: <20210401153156.1165900-1-alex.kogan@oracle.com> <20210401153156.1165900-5-alex.kogan@oracle.com> <87mtu2vhzz.fsf@linux.intel.com> <4a9dbfa7-db68-a2dc-9018-a5b74f0f421c@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4a9dbfa7-db68-a2dc-9018-a5b74f0f421c@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > The CNA code, if enabled, will be in vmlinux, not in a kernel module. As a > result, I think a module parameter will be no different from a kernel > command line parameter in this regard. You can still change it in /sys at runtime, even if it's in the vmlinux. -Andi