linux-kernel - Re: kernfs: can read/write method grow buffer size?

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Message-ID: <20190329094823.426d7ed8@nic.cz>
Date:   Fri, 29 Mar 2019 09:48:23 +0100
From:   Marek Behun <marek.behun@....cz>
To:     Pavel Machek <pavel@....cz>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org,
        Jacek Anaszewski <jacek.anaszewski@...il.com>
Subject: Re: kernfs: can read/write method grow buffer size?

> pavel@amd:~/cip$ cat /sys/power/state
> freeze mem disk
> pavel@amd:~/cip$ cat /sys/class/leds/phy0-led/trigger
> none bluetooth-power rfkill-any rfkill-none kbd-scrolllock kbd-numlock
> kbd-capslock kbd-kanalock kbd-shiftlock kbd-altgrlock kbd-ctrllock
> kbd-altlock kbd-shiftllock kbd-shiftrlock kbd-ctrlllock kbd-ctrlrlock
> AC-online BAT0-charging-or-full BAT0-charging BAT0-full
> BAT0-charging-blink-full-solid rfkill0 phy0rx phy0tx phy0assoc
> phy0radio [phy0tpt] mmc0 timer heartbeat audio-mute audio-micmute
> rfkill1 hci0-power rfkill8
> pavel@amd:~/cip$
> 

Yes, and cpufreq governors too list available governosrs as space
separated list.
Maybe the "one value per file" rule was thought-of only after these
were merged?

Marek