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From: Akinobu Mita <akinobu.mita@gmail.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Guenter Roeck <linux@roeck-us.net>,
	Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@fb.com>,
	Sagi Grimberg <sagi@grimberg.me>,
	LKML <linux-kernel@vger.kernel.org>,
	linux-nvme@lists.infradead.org,
	Linux PM <linux-pm@vger.kernel.org>,
	Chris Healy <cphealy@gmail.com>
Subject: Re: [PATCH v2] nvme: Add hardware monitoring support
Date: Thu, 31 Oct 2019 22:46:46 +0900	[thread overview]
Message-ID: <CAC5umyg-QAvyKdSYQnVdST=p7CAGCQjmWpfc=rnK3dau36Y+mg@mail.gmail.com> (raw)
In-Reply-To: <20191030140511.GA14252@lst.de>

2019年10月30日(水) 23:05 Christoph Hellwig <hch@lst.de>:
>
> On Wed, Oct 30, 2019 at 08:16:48PM +0900, Akinobu Mita wrote:
> > The nvme_init_identify() can be called multiple time in nvme ctrl's
> > lifetime (e.g 'nvme reset /dev/nvme*' or suspend/resume paths), so
> > should we need to prevent nvme_hwmon_init() from registering hwmon
> > device more than twice?
> >
> > In the nvme thermal zone patchset[1], thernal zone is registered in
> > nvme_init_identify and unregistered in nvme_stop_ctrl().
>
> So Guenter said above the thermal subsystem could use the information
> from hwmon as well.  Does this mean this patch would solve your needs
> as well?

The main reason I chose thermal framework was to utilize the temperature
threshold feature for notification on crossing a trip point temperature
without polling for smart log.

But the device I used for testing doesn't seem to report asynchronous
event immediately, so I'm not fully sure that's useful for now.

I have no problem with this nvme hwmon patch.  Maybe we can integrate
the temperature threshold feature into the nvme hwmon afterward.

  parent reply	other threads:[~2019-10-31 13:46 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-29 22:32 [PATCH v2] nvme: Add hardware monitoring support Guenter Roeck
2019-10-30  0:53 ` Keith Busch
2019-11-06 21:29   ` Pavel Machek
2019-11-06 22:30     ` Guenter Roeck
2019-11-06 23:58     ` Chris Healy
2019-10-30 11:16 ` Akinobu Mita
2019-10-30 14:05   ` Christoph Hellwig
2019-10-31  2:54     ` Guenter Roeck
2019-10-31 13:46       ` Christoph Hellwig
2019-10-31 13:46     ` Akinobu Mita [this message]
2019-10-31  2:20   ` Guenter Roeck
2019-10-31 13:44     ` Akinobu Mita
2019-10-31 13:45     ` Christoph Hellwig
2019-10-31 17:54       ` Guenter Roeck
2019-10-30 14:12 ` Christoph Hellwig
2019-10-30 23:40 ` Chris Healy

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