Hi!
From: Johannes Weiner <hannes@xxxxxxxxxxx>
[ Upstream commit 204cb79ad42f015312a5bbd7012d09c93d9b46fb ]
Currently, the drop_caches proc file and sysctl read back the last value
written, suggesting this is somehow a stateful setting instead of a
one-time command. Make it write-only, like e.g. compact_memory.
I have no problem with that, but is it good idea for stable?
Plus, I seem to recall that drop_caches was somehow dangerous,
debugging-only stuff, one should not use on production system. Did
that get fixed in the meantime?