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Wed, 12 Aug 2026 08:07:16 +0000 (GMT) Received: from [9.61.0.237] (unknown [9.61.0.237]) by smtpav04.dal12v.mail.ibm.com (Postfix) with ESMTP; Wed, 12 Aug 2026 08:07:15 +0000 (GMT) Message-ID: Date: Wed, 12 Aug 2026 13:37:14 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 0/9] nvme-multipath: introduce latency I/O policy To: John Garry , linux-nvme@lists.infradead.org Cc: hare@suse.de, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, dwagner@suse.de, kanie@linux.alibaba.com, jmeneghi@redhat.com, randyj@purestorage.com, martin.petersen@oracle.com, gjoyce@linux.ibm.com References: <20260809100825.2014133-1-nilay@linux.ibm.com> <35c99788-ad97-420d-b16d-5ba8f6a28f82@oracle.com> <52332d80-95b2-4aae-8dd7-313b6e76f5fc@oracle.com> Content-Language: en-US From: Nilay Shroff In-Reply-To: <52332d80-95b2-4aae-8dd7-313b6e76f5fc@oracle.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=RsP16imK c=1 sm=1 tr=0 ts=6a7c29ba cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=NEAV23lmAAAA:8 a=t34BQtHZ46P9W9PX5DYA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: YeD-0_nOeKWGZJaT_c3At7rn4d8P4q44 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODEyMDA2MyBTYWx0ZWRfX02Jr0VxYqEGQ mkTOQGj9nEuqHlMhDH1x0eqj8d4iPBVd+qBSxPIB5wqgSBh5q1atqj1VAWvtInkCEI74OKa0Biy APnfVaYF+QFlogGt9FnCQ9spQ2XS+cin0+p0IjPsRFeBqgWVnNdMEWnxNr2S1urXNDQqzk1jIE9 vvpYnThIxQB1OyGiZalhF7ywijRL/eBTWQDelIQ7sgGLEc2AHjBBJ8R5kZQXlPI4NBq3ZCtT3Sd A8hmV3tdGC4+x1XOboejGjetwgzrDWIMAgJOoIgekPpMOh8MTUeEnuEkMLZ+eR1c5NEAEd18V/6 m9+yGKOIU0bZvTB1CPrKJjPGkDq0HhoO1S46TPnfa2AA1lqgwqC3ZvSV+xs07RDHB2ypTYRxGj7 aMyDAkAAemDv7z1uuIgAqeJ1Z5l+JZfNaqPsvHhB/7lsR9HDIRM371VEtzP9rmVywBjrUeTuder lGMD+3SJahTIzJsUo+w== X-Proofpoint-ORIG-GUID: KAtZUNnurAtFERdM_4m-jmU4fR8zw1db X-Proofpoint-Spam-Info: AW1haW4tMjYwODEyMDA2MyBTYWx0ZWRfX4xdE5cbLbBRI +vlJbX5GOHJCD26V4td9v/XM5sQDTErgNACAQrbKxKm6lb2exy9jK7MXkiiyy2wogsoM91srZhz WoJHNfO6vF64xtrwFl2TdQ6P78AP79s= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-12_02,2026-08-10_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 suspectscore=0 clxscore=1015 malwarescore=0 phishscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608120063 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260812_010730_816564_5BA14ED0 X-CRM114-Status: GOOD ( 10.17 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 8/11/26 3:07 PM, John Garry wrote: > JFYI, on another topic, I did a quick port of this to libmultipath as a PoC: > > https://github.com/johnpgarry/linux/commits/scsi-multipath-v7.2-v7-latency-v7/ > > It's really just a direct symbol-for-symbol change. This is great! Thanks, --Nilay