linux-kernel - Re: [PATCH 0/3] Provide more fine grained control over multipathing

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Message-ID: <20180529072240.np5c62akbr7jqelr@linux-x5ow.site>
Date:   Tue, 29 May 2018 09:22:40 +0200
From:   Johannes Thumshirn <jthumshirn@...e.de>
To:     Mike Snitzer <snitzer@...hat.com>
Cc:     "Martin K. Petersen" <martin.petersen@...cle.com>,
        Linux NVMe Mailinglist <linux-nvme@...ts.infradead.org>,
        Laurence Oberman <loberman@...hat.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        James Smart <james.smart@...adcom.com>,
        Ewan Milne <emilne@...hat.com>,
        Linux Kernel Mailinglist <linux-kernel@...r.kernel.org>,
        Keith Busch <keith.busch@...el.com>,
        Hannes Reinecke <hare@...e.de>,
        Martin George <marting@...app.com>,
        Christoph Hellwig <hch@....de>,
        John Meneghini <John.Meneghini@...app.com>
Subject: Re: [PATCH 0/3] Provide more fine grained control over multipathing

On Mon, May 28, 2018 at 11:02:36PM -0400, Mike Snitzer wrote:
> No, what both Red Hat and SUSE are saying is: cool let's have a go at
> "Plan A" but, in parallel, what harm is there in allowing "Plan B" (dm
> multipath) to be conditionally enabled to coexist with native NVMe
> multipath?

For a "Plan B" we can still use the global knob that's already in
place (even if this reminds me so much about scsi-mq which at least we
haven't turned on in fear of performance regressions).

Let's drop the discussion here, I don't think it leads to something
else than flamewars.

     Johannes
-- 
Johannes Thumshirn                                          Storage
jthumshirn@...e.de                                +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
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