Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753212AbdDGEih convert rfc822-to-8bit (ORCPT ); Fri, 7 Apr 2017 00:38:37 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:46631 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751996AbdDGEia (ORCPT ); Fri, 7 Apr 2017 00:38:30 -0400 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 10.2 \(3259\)) Subject: Re: WARN @lib/refcount.c:128 during hot unplug of I/O adapter. From: Sachin Sant In-Reply-To: Date: Fri, 7 Apr 2017 10:08:23 +0530 Cc: linuxppc-dev@ozlabs.org, "nfont >> Nathan Fontenot" , LKML Content-Transfer-Encoding: 8BIT References: To: Tyrel Datwyler X-Mailer: Apple Mail (2.3259) X-TM-AS-MML: disable x-cbid: 17040704-0020-0000-0000-000000E20285 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17040704-0021-0000-0000-000002A13392 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-04-07_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1702020001 definitions=main-1704070040 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 638 Lines: 23 > On 07-Apr-2017, at 2:14 AM, Tyrel Datwyler wrote: > > On 04/06/2017 03:27 AM, Sachin Sant wrote: >> On a POWER8 LPAR running 4.11.0-rc5, a hot unplug operation on >> any I/O adapter results in the following warning > > I remember you mentioning this when the issue was brought up for CPUs. I > assume the case is the same here where the issue is only seen with > adapters that were hot-added after boot (ie. hot-remove of adapter > present at boot doesn't trip the warning)? > Correct, can be recreated only with adapters that were hot-added after boot. > -Tyrel > >> >> Thanks >> -Sachin >> >> >