On Sat, Nov 09, 2019 at 11:16:28PM +0000, Christopher Lameter wrote: > On Sat, 9 Nov 2019, Yu Zhao wrote: > > > > struct page *page, *h; > > > + unsigned long *map = bitmap_alloc(oo_objects(s->max), GFP_KERNEL); > > > + > > > + if (!map) > > > + return; > > > > What would happen if we are trying to allocate from the slab that is > > being shut down? And shouldn't the allocation be conditional (i.e., > > only when CONFIG_SLUB_DEBUG=y)? > > Kmalloc slabs are never shut down. Maybe I'm not thinking straight -- isn't it what caused the deadlock in the first place? Kmalloc slabs can be shut down when memcg is on.
