From: "Marek Behún" <kabel@kernel.org>
To: Ian Pilcher <arequipeno@gmail.com>, pali@kernel.org
Cc: axboe@kernel.dk, kernelnewbies@kernelnewbies.org,
linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
pavel@ucw.cz, linux-leds@vger.kernel.org
Subject: Re: [RFC PATCH v2 00/10] Add configurable block device LED triggers
Date: Mon, 9 Aug 2021 20:56:33 +0200 [thread overview]
Message-ID: <20210809205633.4300bbea@thinkpad> (raw)
In-Reply-To: <20210809033217.1113444-1-arequipeno@gmail.com>
Hello Ian,
thank you for your proposal. Some comments below:
On Sun, 8 Aug 2021 22:32:07 -0500
Ian Pilcher <arequipeno@gmail.com> wrote:
> One thing that has not changed is that associations between block
> devices and LEDs are still set via an attribute on the device, rather
> than the LED. This is much simpler, as the device attribute only has
> to handle a single value (the name of the associated LED), rather than
> potentially handling multiple device names.
It may be simpler, but it is in contrast to how the netdev trigger
works, which already is in upstream for many years. I really think we
should try to have similar sysfs ABIs here. (I understand that the
netdev trigger is currently unable to handle multiple network
interfaces - but it is possible to extend it so.)
> I have modeled the interface for the /sys/block/<DEVICE>/led
> attribute on the sysfs interface used for selecting a trigger. All
> available LEDs (all LEDs associated with the blkdev trigger) are
> shown when the attribute is read, with the currently selected LED
> enclosed in square brackets ([]).
I think it is reasonable to be able to set something like this:
led0 : blink on activity on any of [sda, sdb, sdc]
led1 : blink on activity on sda
led2 : blink on activity on sdb
led3 : blink on activity on sdc
If I am reading your code correctly, it looks that only one LED can be
configured for a block device. Is this true? If so, then the above
configuration cannot be set.
Also you are blinking the LED on any request to the block device. I
would rather expect to be able to set the LED to blink on read and on
write. (And possibly on other functions, like discard, or critical
temperature, or error, ...) I would like to know what other people
think about this.
Marek
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next prev parent reply other threads:[~2021-08-09 18:57 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 3:32 [RFC PATCH v2 00/10] Add configurable block device LED triggers Ian Pilcher
2021-08-09 3:32 ` [RFC PATCH v2 01/10] docs: Add block device LED trigger documentation Ian Pilcher
2021-08-10 13:49 ` Pavel Machek
2021-08-09 3:32 ` [RFC PATCH v2 02/10] block: Add file (blk-ledtrig.c) for block device LED trigger implementation Ian Pilcher
2021-08-09 3:32 ` [RFC PATCH v2 03/10] block: Add block device LED trigger fields to gendisk structure Ian Pilcher
2021-08-09 3:32 ` [RFC PATCH v2 04/10] block: Add functions to set & clear block device LEDs Ian Pilcher
2021-08-09 3:32 ` [RFC PATCH v2 05/10] block: Add block device sysfs attribute to set/clear/show LED Ian Pilcher
2021-08-09 4:21 ` Jackie Liu
2021-08-09 15:44 ` Ian Pilcher
2021-08-09 3:32 ` [RFC PATCH v2 06/10] block: Add activate and deactivate functions for block device LED trigger Ian Pilcher
2021-08-09 3:32 ` [RFC PATCH v2 07/10] block: Add sysfs attributes to LEDs associated with blkdev trigger Ian Pilcher
2021-08-09 3:32 ` [RFC PATCH v2 08/10] block: Add init function for block device LED trigger Ian Pilcher
2021-08-09 3:32 ` [RFC PATCH v2 09/10] block: Blink device LED (if any) when request is sent to its driver Ian Pilcher
2021-08-09 3:32 ` [RFC PATCH v2 10/10] block: Add config option to enable block device LED triggers Ian Pilcher
2021-08-09 18:56 ` Marek Behún [this message]
2021-08-09 19:07 ` [RFC PATCH v2 00/10] Add configurable " Pali Rohár
2021-08-09 19:54 ` Ian Pilcher
2021-08-09 22:43 ` Marek Behún
2021-08-09 23:50 ` Ian Pilcher
2021-08-10 6:35 ` Greg KH
2021-08-10 13:38 ` Marek Behún
2021-08-10 14:48 ` Greg KH
2021-08-10 15:55 ` Ian Pilcher
2021-08-10 16:24 ` Greg KH
2021-08-10 16:39 ` Marek Behún
2021-08-10 16:43 ` Ian Pilcher
2021-08-11 6:26 ` Christoph Hellwig
2021-08-11 10:50 ` Marek Behún
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