linux-kernel - Re: [PATCH v5] nvme: Add hardware monitoring support

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Message-ID: <20191108010237.GA904@redsun51.ssa.fujisawa.hgst.com>
Date:   Fri, 8 Nov 2019 10:02:37 +0900
From:   Keith Busch <kbusch@...nel.org>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Chris Healy <cphealy@...il.com>, Jens Axboe <axboe@...com>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>, linux-kernel@...r.kernel.org,
        linux-nvme@...ts.infradead.org,
        Akinobu Mita <akinobu.mita@...il.com>, linux-pm@...r.kernel.org
Subject: Re: [PATCH v5] nvme: Add hardware monitoring support

On Wed, Nov 06, 2019 at 06:35:18AM -0800, Guenter Roeck wrote:
> nvme devices report temperature information in the controller information
> (for limits) and in the smart log. Currently, the only means to retrieve
> this information is the nvme command line interface, which requires
> super-user privileges.
> 
> At the same time, it would be desirable to be able to use NVMe temperature
> information for thermal control.
> 
> This patch adds support to read NVMe temperatures from the kernel using the
> hwmon API and adds temperature zones for NVMe drives. The thermal subsystem
> can use this information to set thermal policies, and userspace can access
> it using libsensors and/or the "sensors" command.
> 
> Example output from the "sensors" command:
> 
> nvme0-pci-0100
> Adapter: PCI adapter
> Composite:    +39.0°C  (high = +85.0°C, crit = +85.0°C)
> Sensor 1:     +39.0°C
> Sensor 2:     +41.0°C
> 
> Reviewed-by: Christoph Hellwig <hch@....de>
> Signed-off-by: Guenter Roeck <linux@...ck-us.net>

Thanks, applied for 5.5