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

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Date:   Mon, 06 Nov 2017 22:40:14 -0500
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Long Li <longli@...hange.microsoft.com>
Cc:     "K . Y . 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 K. Petersen	Oracle Linux Engineering