Messages in this thread | | | Date | Wed, 22 Jan 2014 14:02:02 -0500 | From | James Smart <> | Subject | Re: [LSF/MM TOPIC] [ATTEND] scsi-mq |
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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 > >
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