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From: "Martin K. Petersen" <>
Cc: "K. Y. Srinivasan" <>,
	Haiyang Zhang <>,
	Stephen Hemminger <>,
	Sasha Levin <>,
	"James E.J. Bottomley" <>,
	"Martin K. Petersen" <>,,,, Long Li <>
Subject: Re: [Patch v2] scsi: storvsc: Correctly set number of hardware queues for IDE disk
Date: Wed, 15 Jan 2020 23:03:05 -0500
Message-ID: <> (raw)
In-Reply-To: <> ('s message of "Mon, 13 Jan 2020 16:08:36 -0800")


> Commit 0ed881027690 ("scsi: storvsc: setup 1:1 mapping between
> hardware queue and CPU queue") introduced a regression for disks
> attached to IDE. For these disks the host VSP only offers one VMBUS
> channel. Setting multiple queues can overload the VMBUS channel and
> result in performance drop for high queue depth workload on system
> with large number of CPUs.

Applied to 5.5/scsi-fixes, thanks!

Martin K. Petersen	Oracle Linux Engineering

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Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-14  0:08 longli
2020-01-16  4:03 ` Martin K. Petersen [this message]

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