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,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 8519AC3A5A4 for ; Tue, 27 Aug 2019 15:10:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 617EB217F5 for ; Tue, 27 Aug 2019 15:10:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727893AbfH0PKq (ORCPT ); Tue, 27 Aug 2019 11:10:46 -0400 Received: from mail-pg1-f194.google.com ([209.85.215.194]:44078 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726054AbfH0PKq (ORCPT ); Tue, 27 Aug 2019 11:10:46 -0400 Received: by mail-pg1-f194.google.com with SMTP id i18so12851346pgl.11; Tue, 27 Aug 2019 08:10:45 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=TLt4u7UGczeUqSMgyy+K1XoXpeQZCnRb2YnoO+BMfIo=; b=niRAbPOQI3zUkKnrNsbfzvsmHy7pHWg70NpUY3xDLh9thcNjn9OlluiMgP+qkNnei7 HmJvc4m42HmwxRM18odZ6vNQyPnJfRiwO0DCEfFAWBaA0Cf7NXxsQteFWNdTSUpZ97jh fTajeuDxJ94G9dyzwIB6JtPuCmek5cS4SyUMSeivtMh/Pgrk0NLu8X6oEIksYuP/hZBQ zrKCzydnoQocaIinNx9MeM5uvp/PSfNH0Mhd0LxaQBHCgC5R9h7zl2lWX7sl6QQwcGWV GcUNgxk+3Bgu+aUuGtUaJWfkMCeqCm3ITU3Mn+MwVvW7qb7OlC1pNxynWbq35Mm5eKWs boWQ== X-Gm-Message-State: APjAAAXu6RY7ShmHuWuyZW6CJFe/awnsBtDX5+TGx1/WDWk856Ry7LMU djWuRUzBXfQ3BcVsxkm65ok= X-Google-Smtp-Source: APXvYqyRLYTthx4jSSdw9WJK4sOVCArZyAET+t7jAdAauE0E/bhuVVphUQWChzR4Qx0djZAgygaw/w== X-Received: by 2002:a17:90a:3b4f:: with SMTP id t15mr26738525pjf.45.1566918645076; Tue, 27 Aug 2019 08:10:45 -0700 (PDT) Received: from desktop-bart.svl.corp.google.com ([2620:15c:2cd:202:4308:52a3:24b6:2c60]) by smtp.gmail.com with ESMTPSA id j11sm3174223pjb.11.2019.08.27.08.10.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 27 Aug 2019 08:10:44 -0700 (PDT) Subject: Re: [PATCH 3/4] nvme: pci: pass IRQF_RESCURE_THREAD to request_threaded_irq To: Ming Lei , Thomas Gleixner Cc: Jens Axboe , Hannes Reinecke , Sagi Grimberg , linux-scsi@vger.kernel.org, Peter Zijlstra , Long Li , John Garry , linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, Keith Busch , Ingo Molnar , Christoph Hellwig References: <20190827085344.30799-1-ming.lei@redhat.com> <20190827085344.30799-4-ming.lei@redhat.com> From: Bart Van Assche Message-ID: <7cdb9dbb-46e5-b66a-ddf1-c7ecceb28d7a@acm.org> Date: Tue, 27 Aug 2019 08:10:42 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190827085344.30799-4-ming.lei@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org On 8/27/19 1:53 AM, Ming Lei wrote: > If one vector is spread on several CPUs, usually the interrupt is only > handled on one of these CPUs. Is that perhaps a limitation of x86 interrupt handling hardware? See also the description of physical and logical destination mode of the local APIC in the Intel documentation. Does that limitation also apply to other platforms than x86? Thanks, Bart.