Messages in this thread | | | Subject | Re: [PATCH] leds: remove PAGE_SIZE limit of /sys/class/leds/<led>/trigger | From | Jacek Anaszewski <> | Date | Thu, 12 Sep 2019 19:15:53 +0200 |
| |
Hi Akinobu,
Please bump patch version each time you send an update of the patch with the same subject.
Best regards, Jacek Anaszewski
On 9/12/19 4:39 PM, 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. > > We work around it here by converting /sys/class/leds/<led>/trigger to > binary attribute, which is not limited by length. This is _not_ good > design, do not copy it.
| |