On Wed, Apr 14, 2021 at 9:25 PM Alexei Starovoitov
[off-list ref] wrote:

As I said earlier:
"
If prog refers such hmap as above during prog free the kernel does
for_each_map_elem {if (elem->opaque) del_timer().}
"

This goes back to our previous discussion. Forcing timer deletions on
prog exit is not what we want. The whole point of using a map is to
extend the lifetime of a timer, that is, as long as the map exists, the
timers within it could be still running too.

Thanks.