[FS#252] Memory leak in pppoe connection initialization

[LEDE Bugs]

The following task has a new comment added:

FS#252 - Memory leak in pppoe connection initialization
User who did this - Felix Fietkau (nbd)

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>From what I can see, this is not a real memleak. It appears that some filesystem data gets cached, and that should get cleaned up automatically when more memory is needed.
Please run 'echo 3 > /proc/sys/vm/drop_caches' and check if the memory usage goes back to normal.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=252#comment1438