tree 959616cec5bd6df02c1c2574b70e2dceb62aa72d
parent b6a7a535b32a3298db5b3518bc1f52fccc1597a6
author Alex Lapenkou <lapenkov@fb.com> 1635893796 -0700
committer Alexander Lapenkov <lapenkov.a@yandex.ru> 1635987350 -0700

San: Unguard guarded slabs during arena destruction

When opt_retain is on, slab extents remain guarded in all states, even
retained. This works well if arena is never destroyed, because we
anticipate those slabs will be eventually reused. But if the arena is
destroyed, the slabs must be unguarded to prevent leaking guard pages.