I.MX6ULL FEC Memory Leak

[Sungkyun]

Hi,
I am using I.MX6ULL BSP 4.1.15_2.0.0ga. A memory leak occurs when monitoring using the free command while LAN is connected. Free memory decreases little by little. Is there a memory leak in the FEC driver?
(When I unplug the LAN connector, the memory leak stops.)
However, after 4 days of testing, it seems to converge.
Is this normal? I would appreciate it if you could tell me the reason for this phenomenon.

# while true; do echo 3 > /proc/sys/vm/drop_caches ; free -b | grep 'buffers/cache' | awk '{ print $4 }'; sleep 1;  done

Sungkyun_0-1624437325674.png

Thanks.

[igorpadykov]

Hi Sungkyun

L4.1.15_2.0.0 BSP is not more supported as outdated, recommended to migrate to

latest nxp releases described on

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applicat...

Best regards
igor

[Sungkyun]

Hi,

The kernel cannot be upgraded because this product is already on sale. Could you explain whether this phenomenon is normal or not?

If it is normal for free memory to decrease for a certain period of time, could it be because of the Ring Buffer?

Thanks.