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Petersen" , "Michael Kelley \(EOSG\)" , Long Li , KY Srinivasan , Haiyang Zhang , Stephen Hemminger , "James E . J . Bottomley" , "devel\@linuxdriverproject.org" , "linux-scsi\@vger.kernel.org" , "linux-kernel\@vger.kernel.org" Subject: Re: [PATCH v2] storvsc: Set up correct queue depth values for IDE devices From: "Martin K. Petersen" Organization: Oracle Corporation References: <20180322214718.29547-1-longli@linuxonhyperv.com> Date: Fri, 20 Apr 2018 15:36:45 -0400 In-Reply-To: (Long Li's message of "Thu, 19 Apr 2018 04:59:12 +0000") 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=8869 signatures=668698 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=494 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1711220000 definitions=main-1804200197 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Long, > If num_cpus=1, we don't have any sub channels. > > The host offers one sub channel for VM with 5 CPUs, after that it offers > an additional sub channel every 4 CPUs. > > The primary channel is always offered. Applied to 4.17/scsi-fixes. Thanks! -- Martin K. Petersen Oracle Linux Engineering