linux-kernel - Re: [PATCH] nvme-multipath: implement active-active round-robin path selector

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Message-ID: <20180328080646.GB20373@lst.de>
Date:   Wed, 28 Mar 2018 10:06:46 +0200
From:   Christoph Hellwig <hch@....de>
To:     Baegjae Sung <baegjae@...il.com>
Cc:     keith.busch@...el.com, axboe@...com, hch@....de, sagi@...mberg.me,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nvme-multipath: implement active-active round-robin
        path selector

For PCIe devices the right policy is not a round robin but to use
the pcie device closer to the node.  I did a prototype for that
long ago and the concept can work.  Can you look into that and
also make that policy used automatically for PCIe devices?