linux-kernel - Re: [Linux-nvdimm] [PATCH v2 10/20] pmem: use ida

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Message-ID: <CAPcyv4jeYnMxvAgVnuOvS8P7L3AftpRQ6trOCPuOEEHa8pSkMA@mail.gmail.com>
Date:	Wed, 29 Apr 2015 14:36:47 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	Linda Knippers <linda.knippers@...com>
Cc:	Toshi Kani <toshi.kani@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@....de>,
	"linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>
Subject: Re: [Linux-nvdimm] [PATCH v2 10/20] pmem: use ida

On Wed, Apr 29, 2015 at 1:49 PM, Linda Knippers <linda.knippers@...com> wrote:
> On 4/29/2015 2:53 PM, Toshi Kani wrote:
> What's the right answer for this in the long run?

Short term, /dev/disk/by-uuid to take a stable identifier from the
contents of the device.

Longer term teach udev to populate /dev/disk/by-id with stable names
for libnd devices.  The trick is identifiers for interleaved PMEM
ranges comprised of multiple physical devices.  I'm thinking something
like /dev/disk/by-id/nd-<set_cookie>
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