Writing LED brightness value to /sys/class/leds/gl-ar150:lan/brightness

[souravndp]

I know that I can switch on/off the LEDs on my device (GL-AR150) using echo 1 > /sys/class/leds/gl-ar150:lan/brightness or echo 0 > /sys/class/leds/gl-ar150:lan/brightness . Now, I have a script which checks my upstream connectivity and updates the LED status quite frequently. But I have read that we need to avoid writing on flash too often. For frequent updates, we need to use the /tmp directory (ie., writing on the RAM).

Thus my question is, Doesn't the above operation write on the flash? If yes, Is there any other way to switch on/off the LED?

[mbo2o]

No, it is not on flash.

df .
Filesystem           1K-blocks      Used Available Use% Mounted on
sysfs                        0         0         0   0% /sys

sysfs

[souravndp]

Thank you for your reply. Now my confusion is cleared.

From kernel.org:

sysfs is a ram -based filesystem initially based on ramfs