eturned; this was echan's idea on this topic. Once the grace period is reached, it would act as-if they got returned then (so in the above scenario the arena could get jemalloc-deinitialized and all). If program needs to exit, it could either block until the end of the grace period or... who knows? 2, something similar could be done about the SHM-internal-use channel: do not close it but add it to some list of such channels; they would be finally closed upon detection of the other side's <code><a class="el"