On Mon, 16 Apr 2018, Mikulas Patocka wrote: > > > > Or an increase in slab_max_order > > But that will increase it for all slabs (often senselessly - i.e. > kmalloc-4096 would have order 4MB). 4MB? Nope.... That is a power of two slab so no wasted space even with order 0. Its not a senseless increase. The more objects you fit into a slab page the higher the performance of the allocator. > I need to increase it just for dm-bufio slabs. If you do this then others will want the same...
