* Re: [PATCH RFC v1 0/5] Add SCSI per device tagsets
[not found] <20220218184157.176457-1-melanieplageman@gmail.com>
@ 2022-02-19 7:37 ` Christoph Hellwig
0 siblings, 0 replies; only message in thread
From: Christoph Hellwig @ 2022-02-19 7:37 UTC (permalink / raw)
To: Melanie Plageman (Microsoft)
Cc: tyreld, linux-hyperv, mst, benh, mikelley,
R-QLogic-Storage-Upstream, paulus, wei.liu, sthemmin, linux-scsi,
mpe, sathya.prakash, decui, kashyap.desai, njavali,
MPT-FusionLinux.pdl, haiyangz, mpi3mr-linuxdrv.pdl,
suganath-prabu.subramani, jejb, john.garry, stefanha, storagedev,
virtualization, megaraidlinux.pdl, sreekanth.reddy,
martin.petersen, shivasharan.srikanteshwara, linuxppc-dev,
linux-kernel, sumit.saxena, andres, pbonzini, don.brace
On Fri, Feb 18, 2022 at 06:41:52PM +0000, Melanie Plageman (Microsoft) wrote:
> Currently a single blk_mq_tag_set is associated with a Scsi_Host. When SCSI
> controllers are limited, attaching multiple devices to the same controller is
> required. In cloud environments with relatively high latency persistent storage,
> requiring all devices on a controller to share a single blk_mq_tag_set
> negatively impacts performance.
So add more controllers instead of completely breaking the architecture.
_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
^ permalink raw reply [flat|nested] only message in thread