On Tue, 17 Apr 2018, Mikulas Patocka wrote: > > > The slub subsystem does actual fallback to low-order when the allocation > > > fails (it allows different order for each slab in the same cache), but > > > slab doesn't fallback and you get NULL if higher-order allocation fails. > > > So, SLAB_MINIMIZE_WASTE is needed for slab because it will just randomly > > > fail with higher order. > > > > Fix Slab instead of adding a flag that is only useful for one allocator? > > Slab assumes that all slabs have the same order, so it's not so easy to > fix it. Well since SLAB uses compound pages one could easily determine the order of the page and thus also support multiple page orders there.
