From: Pavel Machek <pavel@ucw.cz>
To: Akinobu Mita <akinobu.mita@gmail.com>
Cc: linux-block@vger.kernel.org, linux-leds@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org,
Frank Steiner <fsteiner-mail1@bio.ifi.lmu.de>,
Jacek Anaszewski <jacek.anaszewski@gmail.com>,
Dan Murphy <dmurphy@ti.com>, Jens Axboe <axboe@kernel.dk>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Hannes Reinecke <hare@suse.com>
Subject: Re: [PATCH v3 4/6] block: introduce LED block device activity trigger
Date: Tue, 13 Aug 2019 12:33:13 +0200 [thread overview]
Message-ID: <20190813103313.GC26337@amd> (raw)
In-Reply-To: <1565459703-30513-5-git-send-email-akinobu.mita@gmail.com>
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On Sun 2019-08-11 02:55:01, Akinobu Mita wrote:
> This allows LEDs to be controlled by block device activity.
>
> We already have ledtrig-disk (LED disk activity trigger), but the lower
> level disk drivers need to utilize ledtrig_disk_activity() to make the
> LED blink.
>
> The LED block device trigger doesn't require the lower level drivers to
> have any instrumentation. The activity is collected by polling the disk
> stats.
>
> Example:
>
> echo block-nvme0n1 > /sys/class/leds/diy/trigger
Some machines have lots of block devices... Should we perhaps have
"echo block > trigger; echo nvme0n1 > device"?
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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next prev parent reply other threads:[~2019-08-13 10:33 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-10 17:54 [PATCH v3 0/6] introduce LED block device activity trigger Akinobu Mita
2019-08-10 17:54 ` [PATCH v3 1/6] block: umem: rename LED_* macros to MEMCTRL_LED_* Akinobu Mita
2019-08-13 10:11 ` Pavel Machek
2019-08-10 17:54 ` [PATCH v3 2/6] scsi: mvsas: rename LED_* enums to SGPIO_LED_* Akinobu Mita
2019-08-13 10:12 ` Pavel Machek
2019-08-10 17:55 ` [PATCH v3 3/6] scsi: nsp32: rename LED_* macros to EXT_PORT_LED_* Akinobu Mita
2019-08-10 17:55 ` [PATCH v3 4/6] block: introduce LED block device activity trigger Akinobu Mita
2019-08-12 19:28 ` Jacek Anaszewski
2019-08-13 10:33 ` Pavel Machek [this message]
2019-08-13 15:40 ` Akinobu Mita
2019-08-10 17:55 ` [PATCH v3 5/6] ledtrig-blk: add interface to stop and restart polling disk stats Akinobu Mita
2019-08-12 19:31 ` Jacek Anaszewski
2019-08-13 15:37 ` Akinobu Mita
2019-08-10 17:55 ` [PATCH v3 6/6] scsi: sd: stop polling disk stats by ledtrig-blk during runtime suspend Akinobu Mita
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