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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 93EBAC43142 for ; Fri, 22 Jun 2018 08:41:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4423823F1C for ; Fri, 22 Jun 2018 08:41:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4423823F1C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751336AbeFVIlk (ORCPT ); Fri, 22 Jun 2018 04:41:40 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:8723 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751187AbeFVIlj (ORCPT ); Fri, 22 Jun 2018 04:41:39 -0400 Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 55D079BD0004F; Fri, 22 Jun 2018 16:41:25 +0800 (CST) Received: from [127.0.0.1] (10.177.19.219) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.382.0; Fri, 22 Jun 2018 16:39:42 +0800 From: Yang Yingliang To: Marc Zyngier CC: Hanjun Guo , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Subject: Supporting more IRQs than NR_IRQS + 8196 on ARM64 server Message-ID: <5B2CB5C7.1020801@huawei.com> Date: Fri, 22 Jun 2018 16:39:35 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.19.219] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Marc Current system only supports (NR_IRQS + 8196) interrupts. It's not enough on ARM64 server, on D06 we have several pcie devices and each device supports 256 VMs and each VM uses 64 interrupts. Can we set NR_IRQS to a bigger value to support more interrupts ? Thanks, Yang