Received: by 2002:a05:6a10:6744:0:0:0:0 with SMTP id w4csp5411424pxu; Thu, 22 Oct 2020 01:17:06 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzCXLCfDb36Mfy70lTeu87ZNYT9LPaa+799b/xv94lbrRFcdd5TOODHsh2yDRmSPDXdLlX/ X-Received: by 2002:a50:9b5b:: with SMTP id a27mr1132153edj.374.1603354626218; Thu, 22 Oct 2020 01:17:06 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1603354626; cv=none; d=google.com; s=arc-20160816; b=P3D7cKjoJPxoHqyKSLZ0WI2ZW0Ap5prBnzXx/NR703G/GmZzf8oHVLs4EG0Ww5Sq/z ccgsM0WIQD/bEm1EDbMqY2mh6YpuF0Dc/RWJeslnrcfnqfu+7h5Pg4TYKIt7cSZHh/Qs 0Lw/KZpZMMykZjwXqzEEHTwJvMLuZVYfJUXAadsGSo5LEXttphbHnlwxtR2HuVRHn0C0 TuSqYT+nNmymqXqsC6gcXjOqeoq4DvDS3XV/IBO5j3+0DE6f1L1CNafaN8dM1S9civU9 mHFQX8E/F05qC4NnoFwhQuBgnthzCMgtJMi4Kx3loEpNIxznUBiSU/tXTOtFuvgX2B94 T1Lw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:references:message-id:in-reply-to :subject:cc:to:from:date; bh=8PFmRw0wDC7QuU4Id7h3I1pqCEW/ij9HwmXIAJ30M9Q=; b=EL7xkVjGPbRkkar0s0Q3WSAYhp8teGDq0/FwkZWV+LFbdNAxMXIWCcYG3wgGD73sQU gcaPQpHjQ7w2ekZTCMEFQ4ULAeo49NkAbr65GPeHQtvzOfaxByroRA2o/pfw7VR5xYpq 4BoS2geMPyIRLi6IQv+jgqj2YQEypuFToFdLPP0LlS2J7XhOicPeqVnLnx/iBS7L0Ysk 6b0NuG++tn1wJYsp3qvBWJfZ9M1viGl7WtNeZTXpaNaFjPee4lQI9nl7ZVipk3KdA6aS 4qC4koyCvD/ucDNRzymAilSOXAmltR0H4Xckm3DNEcS5JKusmT8JezbZy9TS29uYcEJV x9XA== 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id q25si479911edw.184.2020.10.22.01.16.44; Thu, 22 Oct 2020 01:17:06 -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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2895396AbgJVD3L (ORCPT + 99 others); Wed, 21 Oct 2020 23:29:11 -0400 Received: from kvm5.telegraphics.com.au ([98.124.60.144]:47162 "EHLO kvm5.telegraphics.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2443905AbgJVD3K (ORCPT ); Wed, 21 Oct 2020 23:29:10 -0400 Received: from localhost (localhost.localdomain [127.0.0.1]) by kvm5.telegraphics.com.au (Postfix) with ESMTP id BA0682287E; Wed, 21 Oct 2020 23:29:07 -0400 (EDT) Date: Thu, 22 Oct 2020 14:29:16 +1100 (AEDT) From: Finn Thain To: Tianxianting cc: "kashyap.desai@broadcom.com" , "sumit.saxena@broadcom.com" , "shivasharan.srikanteshwara@broadcom.com" , "jejb@linux.ibm.com" , "martin.petersen@oracle.com" , "megaraidlinux.pdl@broadcom.com" , "linux-scsi@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH] scsi: megaraid_sas: use spin_lock() in hard IRQ In-Reply-To: <9923f28dd2b34499a17c53e8fa33f1ca@h3c.com> Message-ID: References: <20201021064502.35469-1-tian.xianting@h3c.com> <9923f28dd2b34499a17c53e8fa33f1ca@h3c.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 22 Oct 2020, Tianxianting wrote: > Do you mean Megasas raid can be used in m68k arch? m68k is one example of an architecture on which the unstated assumptions in your patch would be invalid. Does this help to clarify what I wrote? If Megasas raid did work on m68k, I'm sure it could potentially benefit from the theoretical performance improvement from your patch. So perhaps you would consider adding support for slower CPUs like m68k.