Re: [PATCHv2] scsi_dh_alua: skip RTPG for devices only supporting active/optimized

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To: Hannes Reinecke <hare@xxxxxxx>
Subject: Re: [PATCHv2] scsi_dh_alua: skip RTPG for devices only supporting active/optimized
From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Date: Wed, 10 Jan 2018 23:09:55 -0500
Cc: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, James Bottomley <james.bottomley@xxxxxxxxxxxxxxxxxxxxx>, Bart van Assche <bart.vanassche@xxxxxxx>, linux-scsi@xxxxxxxxxxxxxxx, Hannes Reinecke <hare@xxxxxxxx>
In-reply-to: <1513943573-35956-1-git-send-email-hare@suse.de> (Hannes Reinecke's message of "Fri, 22 Dec 2017 12:52:53 +0100")
Organization: Oracle Corporation
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux)

Hannes,

> For hardware only supporting active/optimized there's no point in
> ever re-issuing RTPG as the only new state we can possibly read is
> active/optimized.
> This avoid spurious errors during path failover on such arrays.

Applied to 4.16/scsi-queue. Thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering

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References:
- [PATCHv2] scsi_dh_alua: skip RTPG for devices only supporting active/optimized
  - From: Hannes Reinecke

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