From patchwork Thu Feb 13 12:37:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Halil Pasic X-Patchwork-Id: 11380273 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B095E921 for ; Thu, 13 Feb 2020 12:37:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9A50D24649 for ; Thu, 13 Feb 2020 12:37:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729511AbgBMMhz (ORCPT ); Thu, 13 Feb 2020 07:37:55 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:49656 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729526AbgBMMhz (ORCPT ); Thu, 13 Feb 2020 07:37:55 -0500 Received: from pps.filterd (m0127361.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 01DCXaxd128660 for ; Thu, 13 Feb 2020 07:37:54 -0500 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0a-001b2d01.pphosted.com with ESMTP id 2y1ucnp7ja-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 13 Feb 2020 07:37:54 -0500 Received: from localhost by e06smtp05.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 13 Feb 2020 12:37:51 -0000 Received: from b06cxnps4074.portsmouth.uk.ibm.com (9.149.109.196) by e06smtp05.uk.ibm.com (192.168.101.135) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 13 Feb 2020 12:37:48 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 01DCbkJR12583112 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 13 Feb 2020 12:37:46 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BBF0852054; Thu, 13 Feb 2020 12:37:46 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 3FBE052057; Thu, 13 Feb 2020 12:37:46 +0000 (GMT) From: Halil Pasic To: "Michael S. Tsirkin" , Jason Wang Cc: Halil Pasic , Paolo Bonzini , Stefan Hajnoczi , Jens Axboe , virtualization@lists.linux-foundation.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, Christian Borntraeger , Viktor Mihajlovski , Cornelia Huck , Ram Pai , Thiago Jung Bauermann , "Lendacky, Thomas" Subject: [PATCH 0/2] virtio-blk: improve handling of DMA mapping failures Date: Thu, 13 Feb 2020 13:37:26 +0100 X-Mailer: git-send-email 2.17.1 X-TM-AS-GCONF: 00 x-cbid: 20021312-0020-0000-0000-000003A9C68C X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20021312-0021-0000-0000-00002201B132 Message-Id: <20200213123728.61216-1-pasic@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-02-13_04:2020-02-12,2020-02-13 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 phishscore=0 impostorscore=0 adultscore=0 lowpriorityscore=0 mlxscore=0 mlxlogscore=969 priorityscore=1501 suspectscore=0 spamscore=0 clxscore=1011 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002130098 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Two patches are handling new edge cases introduced by doing DMA mappings (which can fail) in virtio core. I stumbled upon this while stress testing I/O for Protected Virtual Machines. I deliberately chose a tiny swiotlb size and have generated load with fio. With more than one virtio-blk disk in use I experienced hangs. The goal of this series is to fix those hangs. Halil Pasic (2): virtio-blk: fix hw_queue stopped on arbitrary error virtio-blk: improve virtqueue error to BLK_STS drivers/block/virtio_blk.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) base-commit: 39bed42de2e7d74686a2d5a45638d6a5d7e7d473 Reviewed-by: Stefan Hajnoczi