linux-kernel - Re: [PATCH v4 12/16] libnvdimm, nfit: enable support for volatile ranges

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Date:   Thu, 29 Jun 2017 15:58:48 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Linda Knippers <linda.knippers@....com>
Cc:     "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        Jan Kara <jack@...e.cz>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        X86 ML <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v4 12/16] libnvdimm, nfit: enable support for volatile ranges

On Thu, Jun 29, 2017 at 3:49 PM, Linda Knippers <linda.knippers@....com> wrote:
>> The parent region of the namespace will have a 'volatile' type:
>>
>> # cat /sys/bus/nd/devices/region0/devtype
>> nd_volatile
>
>
> If all I know is the /dev/pmem device name, how do I find that?
>

    cat $(readlink -f /sys/block/pmem0/device)/../devtype

...this is where 'ndctl list' will get the information.