From mboxrd@z Thu Jan 1 00:00:00 1970 From: Balbir Singh Subject: Re: [next-20170217] WARN @/arch/powerpc/include/asm/xics.h:124 .icp_hv_eoi+0x40/0x140 Date: Mon, 20 Feb 2017 14:44:21 +1100 Message-ID: <1487562261.10535.8.camel@gmail.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Return-path: Received: from mail-pg0-f51.google.com ([74.125.83.51]:34452 "EHLO mail-pg0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751897AbdBTDoi (ORCPT ); Sun, 19 Feb 2017 22:44:38 -0500 Received: by mail-pg0-f51.google.com with SMTP id z67so34539435pgb.1 for ; Sun, 19 Feb 2017 19:44:27 -0800 (PST) In-Reply-To: Sender: linux-next-owner@vger.kernel.org List-ID: To: Sachin Sant , linux-next@vger.kernel.org Cc: linuxppc-dev@ozlabs.org On Sun, 2017-02-19 at 20:39 +0530, Sachin Sant wrote: > While booting next-20170217 on a POWER6 box, I ran into following > warning. This is a full system lpar. Previous next tree was good. > I will try a bisect tomorrow. >  > ipr: IBM Power RAID SCSI Device Driver version: 2.6.3 (October 17, 2015) > ipr 0200:00:01.0: Found IOA with IRQ: 305 > ------------[ cut here ]------------ > WARNING: CPU: 12 PID: 1 at ./arch/powerpc/include/asm/xics.h:124 .icp_hv_eoi+0x40/0x140 This indicates that the CPPR stack underflow'd (we don't know the CPPR value at the time of the interrupt that we are going to do an EOI for).  The problem could have occured elsewhere, but shows up at the first interrupt after the real cause. Could you past the full dmesg and config and follow Michael's suggestion for debugging SHIRQ's Balbir