From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Akinobu Mita <akinobu.mita@gmail.com>
Cc: linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org,
"Rafael J. Wysocki" <rafael@kernel.org>,
Jacek Anaszewski <jacek.anaszewski@gmail.com>,
Pavel Machek <pavel@ucw.cz>, Dan Murphy <dmurphy@ti.com>
Subject: Re: [PATCH 1/5] leds: remove PAGE_SIZE limit of /sys/class/leds/<led>/trigger
Date: Sun, 8 Sep 2019 14:18:26 +0100 [thread overview]
Message-ID: <20190908131826.GA10679@kroah.com> (raw)
In-Reply-To: <1567946472-10075-2-git-send-email-akinobu.mita@gmail.com>
On Sun, Sep 08, 2019 at 09:41:08PM +0900, Akinobu Mita wrote:
> Reading /sys/class/leds/<led>/trigger returns all available LED triggers.
> However, the size of this file is limited to PAGE_SIZE because of the
> limitation for sysfs attribute.
>
> Enabling LED CPU trigger on systems with thousands of CPUs easily hits
> PAGE_SIZE limit, and makes it impossible to see all available LED triggers
> and which trigger is currently activated.
>
> This converts /sys/class/leds/<led>/trigger to bin attribute and removes
> the PAGE_SIZE limitation.
Can you also put the "this really is not a good idea" type wording here
in the changelog text as well? Just want to try to make it explicitly
clear that this should never be copied by anyone else.
thanks,
greg k-h
next prev parent reply other threads:[~2019-09-08 13:18 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-08 12:41 [PATCH 0/5] leds: fix /sys/class/leds/<led>/trigger and add new api Akinobu Mita
2019-09-08 12:41 ` [PATCH 1/5] leds: remove PAGE_SIZE limit of /sys/class/leds/<led>/trigger Akinobu Mita
2019-09-08 13:10 ` Greg Kroah-Hartman
2019-09-11 15:25 ` Akinobu Mita
2019-09-11 15:36 ` Greg Kroah-Hartman
2019-09-11 17:25 ` Akinobu Mita
2019-09-08 13:18 ` Greg Kroah-Hartman [this message]
2019-09-08 12:41 ` [PATCH 2/5] leds: make sure leds_class is initialized before triggers are registered Akinobu Mita
2019-09-08 13:07 ` Greg Kroah-Hartman
2019-09-08 12:41 ` [PATCH 3/5] driver core: class: add function to create /sys/class/<class>/foo directory Akinobu Mita
2019-09-08 13:08 ` Greg Kroah-Hartman
2019-09-08 13:11 ` Greg Kroah-Hartman
2019-09-08 20:26 ` Pavel Machek
2019-09-08 12:41 ` [PATCH 4/5] leds: add /sys/class/triggers/ that contains trigger sub-directories Akinobu Mita
2019-09-08 13:21 ` Greg Kroah-Hartman
2019-09-08 12:41 ` [PATCH 5/5] leds: add /sys/class/leds/<led>/current-trigger Akinobu Mita
2019-09-08 13:10 ` Greg Kroah-Hartman
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