[PATCH] storvsc: Avoid excessive host scan on controller change

Long Li longli at microsoft.com
Tue Nov 7 07:22:52 UTC 2017


> From: Martin K. Petersen [mailto:martin.petersen at oracle.com]
> Sent: Monday, November 6, 2017 7:40 PM
> To: Long Li <longli at microsoft.com>
> Cc: KY Srinivasan <kys at microsoft.com>; Haiyang Zhang
> <haiyangz at microsoft.com>; Stephen Hemminger
> <sthemmin at microsoft.com>; James E . J . Bottomley
> <JBottomley at odin.com>; Martin K . Petersen
> <martin.petersen at oracle.com>; devel at linuxdriverproject.org; linux-
> scsi at vger.kernel.org; linux-kernel at vger.kernel.org; Long Li
> <longli at microsoft.com>
> Subject: Re: [PATCH] storvsc: Avoid excessive host scan on controller change
> 
> 
> Long,
> 
> > When there are multiple disks attached to the same SCSI controller,
> > the host may send several VSTOR_OPERATION_REMOVE_DEVICE or
> > VSTOR_OPERATION_ENUMERATE_BUS messages in a row, to indicate
> there is
> > a change on the SCSI controller. In response, storvsc rescans the SCSI
> > host.
> 
> Applied to 4.15/scsi-queue with some fuzz. Please verify, thanks!

Martin, thank you! All looking good.

Long

> 
> --
> Martin K. Petersen	Oracle Linux Engineering


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