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Petersen" , Hannes Reinecke , Bart Van Assche , Ming Lei , Linux SCSI Mailinglist , Linux Kernel Mailinglist Subject: Re: [PATCH] scsi: switch to scsi-mq by default From: "Martin K. Petersen" Organization: Oracle Corporation References: <20180704085356.10888-1-jthumshirn@suse.de> Date: Tue, 10 Jul 2018 22:52:21 -0400 In-Reply-To: <20180704085356.10888-1-jthumshirn@suse.de> (Johannes Thumshirn's message of "Wed, 4 Jul 2018 10:53:56 +0200") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8950 signatures=668706 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=408 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1807110026 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Johannes, > It has been more than one year since we tried to change the default > from legacy to multi queue in SCSI with commit c279bd9e406 ("scsi: > default to scsi-mq"). But due to issues with suspend/resume and > performance problems it had been reverted again with commit > cbe7dfa26eee ("Revert "scsi: default to scsi-mq""). > > In the meantime there have been a substantial amount of performance > improvements and suspend/resume got fixed as well, thus we can > re-enable scsi-mq without a significant performance penalty. Applied to 4.19/scsi-queue, thanks! -- Martin K. Petersen Oracle Linux Engineering