Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758163AbcJYH32 (ORCPT ); Tue, 25 Oct 2016 03:29:28 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:48675 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752418AbcJYH3Z (ORCPT ); Tue, 25 Oct 2016 03:29:25 -0400 Subject: Re: [patch] zfcp: spin_lock_irqsave() is not nestable To: "Martin K. Petersen" , Steffen Maier References: <20161013085358.GH16198@mwanda> <409dfaed-85eb-01ba-539d-df95f008a6bf@linux.vnet.ibm.com> <63c024b9-8662-e521-62e0-e0ebe980b217@de.ibm.com> Cc: Dan Carpenter , linux-scsi@vger.kernel.org, "James E . J . Bottomley" , Martin Schwidefsky , Heiko Carstens , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, =?UTF-8?Q?Hendrik_Br=c3=bcckner?= , Gerald Schaefer From: Christian Borntraeger Date: Tue, 25 Oct 2016 09:28:29 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <63c024b9-8662-e521-62e0-e0ebe980b217@de.ibm.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16102507-0036-0000-0000-0000024AACBB X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16102507-0037-0000-0000-000012FCD5F9 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-10-25_02:,, 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=8.0.1-1609300000 definitions=main-1610250126 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 693 Lines: 17 On 10/24/2016 10:18 AM, Christian Borntraeger wrote: > On 10/14/2016 10:21 PM, Martin K. Petersen wrote: >>>>>>> "Steffen" == Steffen Maier writes: >> >> Steffen> could you please queue this as fix for one of my patches that >> Steffen> went into the 4.9 merge window, so for 4.9-rc I guess? >> >> Applied to 4.9/scsi-fixes. >> > > FWIW, I do see rcu stall errors with 4.9-rc1 from time to time, so I assume > that this fix is not only theoretical but fixes a real life issue. Yes, with that patch the rcu stalls are gone, I assume its already on a branch that does not rebase, otherwise feel free to add Tested-by: Christian Borntraeger