Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753398AbaAVTCJ (ORCPT ); Wed, 22 Jan 2014 14:02:09 -0500 Received: from cmexedge1.ext.emulex.com ([138.239.224.99]:23052 "EHLO CMEXEDGE1.ext.emulex.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753260AbaAVTCH (ORCPT ); Wed, 22 Jan 2014 14:02:07 -0500 Message-ID: <52E015AA.6010104@emulex.com> Date: Wed, 22 Jan 2014 14:02:02 -0500 From: James Smart Reply-To: User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20121026 Thunderbird/16.0.2 MIME-Version: 1.0 To: James Bottomley CC: "Nicholas A. Bellinger" , , linux-scsi , LKML Subject: Re: [LSF/MM TOPIC] [ATTEND] scsi-mq References: <1389827148.5567.597.camel@haakon3.risingtidesystems.com> <52D808FD.9010007@dev.mellanox.co.il> In-Reply-To: <52D808FD.9010007@dev.mellanox.co.il> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org James, I'd like to attend to participate in the EH, MQ, and T10 PI RDMA discussions. -- james s On 1/16/2014 11:29 AM, Sagi Grimberg wrote: > On 1/16/2014 1:05 AM, Nicholas A. Bellinger wrote: >> Hi all, >> >> I'd like to discuss the current state of scsi-mq prototype code. >> >> And now that blk-mq is upstream for v3.13, exploring the remaining TODO >> items towards an initial scsi-mq merge sometime before 2015 is upon us. >> >> The benefits of scsi-mq remain unchanged: >> >> - Utilizes blk-mq's native per-cpu primitive + NUMA local friendly >> queuing of pre-allocated struct request descriptor memory >> - Eliminates all fast-path memory allocations in SCSI-core + >> optionally the underlying SCSI LLDs >> - Avoids fast-path Scsi_Host->host_lock + request_queue->queue_lock >> accesses in submission + completion paths >> >> These benefits have been discussed in greater detail in [1], and the >> latest alpha quality code is available at [2] below. >> >> The current TODO items include: >> >> - A plan for per device SCSI error handling >> - Proper scsi_device->sdev_gendev reference counting >> - Queuing fairness across multiple scsi-mq devices per host >> - Support for > 1 nr_hw_queues + conversion of qla2xxx + lpfc >> LLDs that support native hardware multiqueue >> >> Thank you, >> >> --nab >> >> References: >> >> [1]: >> [ATTEND] scsi-mq prototype discussion >> http://marc.info/?l=linux-scsi&m=137358831329753&w=2 >> >> [2]: >> scsi-mq WIP updated to v3.13-rc3 >> http://marc.info/?l=linux-scsi&m=138782535731722&w=2 >> > > +1 > I would be happy to join this discussion, I think it is also important > to think about the interaction with iSCSI and LLDs. > > Sagi. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/