On Tue, 27 Mar 2018, Shakeel Butt wrote: > The kasan quarantine is designed to delay freeing slab objects to catch > use-after-free. The quarantine can be large (several percent of machine > memory size). When kmem_caches are deleted related objects are flushed > from the quarantine but this requires scanning the entire quarantine > which can be very slow. We have seen the kernel busily working on this > while holding slab_mutex and badly affecting cache_reaper, slabinfo > readers and memcg kmem cache creations. Acked-by: Christoph Lameter <cl@xxxxxxxxx>
