linux-kernel - RE: [PATCH] storvsc: Avoid excessive host scan on controller change

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Date:   Tue, 7 Nov 2017 07:22:52 +0000
From:   Long Li <longli@...rosoft.com>
To:     "Martin K. Petersen" <martin.petersen@...cle.com>
CC:     KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "James E . J . Bottomley" <JBottomley@...n.com>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] storvsc: Avoid excessive host scan on controller change

> From: Martin K. Petersen [mailto:martin.petersen@...cle.com]
> Sent: Monday, November 6, 2017 7:40 PM
> To: Long Li <longli@...rosoft.com>
> Cc: KY Srinivasan <kys@...rosoft.com>; Haiyang Zhang
> <haiyangz@...rosoft.com>; Stephen Hemminger
> <sthemmin@...rosoft.com>; James E . J . Bottomley
> <JBottomley@...n.com>; Martin K . Petersen
> <martin.petersen@...cle.com>; devel@...uxdriverproject.org; linux-
> scsi@...r.kernel.org; linux-kernel@...r.kernel.org; Long Li
> <longli@...rosoft.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