From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754516AbeBWTRF (ORCPT ); Fri, 23 Feb 2018 14:17:05 -0500 Received: from mail-pg0-f42.google.com ([74.125.83.42]:39013 "EHLO mail-pg0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751801AbeBWTRB (ORCPT ); Fri, 23 Feb 2018 14:17:01 -0500 X-Google-Smtp-Source: AH8x227TG/uD7SmUmjt7eCZrCOz7w0aa4hn99/IRf534S9IwKmHPNpvpxleyXbHmhAQkD/h+5U991w== To: linux-pci , Linux Kernel Mailing List Cc: Bjorn Helgaas , sbodomerle@gmail.com, rjui@broadcom.com From: valmiki Subject: Affinity on non MSI-X interrupts Message-ID: <714a8d82-c4b0-9661-5b78-ed0d87a0a5fc@gmail.com> Date: Sat, 24 Feb 2018 00:47:00 +0530 User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Does multi MSI interrupts will also be set and routed by affinity ? In drivers/pci/host/pcie-iproc-msi.c interrupt handler there is do while loop. head = iproc_msi_read_reg(msi, IPROC_MSI_EQ_HEAD, eq) & IPROC_MSI_EQ_MASK; do { tail = iproc_msi_read_reg(msi, IPROC_MSI_EQ_TAIL, eq) & IPROC_MSI_EQ_MASK; ..... } */ } while (true); What happens if two multi MSI cards are connected and continuously running traffic ? Will this handler ever come out? wont this stall CPU ? Will the interrupts be routed to different CPU's in this case also? Regards, Valmiki --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus