linux-kernel - Re: [PATCHv2] nvme: Assign subsy instance from first ctrl

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Date:   Sat, 07 Sep 2019 15:13:49 +0900
From:   Minwoo Im <minwoo.im@...sung.com>
To:     Keith Busch <kbusch@...nel.org>, Minwoo Im <minwoo.im@...sung.com>
CC:     Christoph Hellwig <hch@....de>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        Sagi Grimberg <sagi@...mberg.me>,
        Hannes Reinecke <hare@...e.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jens Axboe <axboe@...com>,
        Logan Gunthorpe <logang@...tatee.com>
Subject: Re: [PATCHv2] nvme: Assign subsy instance from first ctrl

> Subject: [PATCHv2] nvme: Assign subsy instance from first ctrl

I'm not sure but, I have not seen 'subsy' thing before.  Maybe
s/sybsy/subsys/ ?

> 
> The namespace disk names must be unique for the lifetime of the
> subsystem. This was accomplished by using their parent subsystems'
> instances which were allocated independently from the controllers
> connected to that subsystem. This allowed name prefixes assigned to
> namespaces to match a controller from an unrelated subsystem, and has
> created confusion among users examining device nodes.
> 
> Ensure a namespace's subsystem instance never clashes with a controller
> instance of another subsystem by transferring the instance ownership
> to the parent subsystem from the first controller discovered in that
> subsystem.
> 
> Reviewed-by: Logan Gunthorpe <logang@...tatee.com>
> Signed-off-by: Keith Busch <kbusch@...nel.org>

Keith, Thanks for this patch.  I really like this concept which can
avoid from instance mistakes.

Otherwise looks good to me.

Reviewed-by: Minwoo Im <minwoo.im@...sung.com>