From: Christoph Hellwig <hch@lst.de>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Christoph Hellwig <hch@lst.de>,
Akinobu Mita <akinobu.mita@gmail.com>,
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 14:46:42 +0100 [thread overview]
Message-ID: <20191031134642.GC4763@lst.de> (raw)
In-Reply-To: <2931487e-2720-fd42-fda0-e47cf89c90c9@roeck-us.net>
On Wed, Oct 30, 2019 at 07:54:47PM -0700, Guenter Roeck wrote:
> On 10/30/19 7:05 AM, Christoph Hellwig wrote:
>> 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?
>>
> Depends on the requirements. Unlike hwmon/iio, we don't have clear
> guidelines describing when thermal vs. hwmon would be a better choice.
> There is some interconnect between thermal and hwmon, but quite often
> it is a one-way street (hwmon devices can easily register thermal
> zones, for thermal zone devices it is a bit more difficult to register
> associated hwmon devices).
I'd like to hear from Akinobu-san if this also solves the thermal zone
use case. If so I'd be much happier as we at least solve two use cases
with one patch.
next prev 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 [this message]
2019-10-31 13:46 ` Akinobu Mita
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20191031134642.GC4763@lst.de \
--to=hch@lst.de \
--cc=akinobu.mita@gmail.com \
--cc=axboe@fb.com \
--cc=cphealy@gmail.com \
--cc=kbusch@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nvme@lists.infradead.org \
--cc=linux-pm@vger.kernel.org \
--cc=linux@roeck-us.net \
--cc=sagi@grimberg.me \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).