Re: [RFC PATCH] powerpc: ideas to improve page table frag allocator

2022-09-06 Thread Nicholas Piggin
On Tue Sep 6, 2022 at 4:36 AM AEST, Christophe Leroy wrote: > > > Le 05/09/2022 à 10:50, Nicholas Piggin a écrit : > > The page table fragment allocator is a simple per-mm slab allocator. > > It can be quite wasteful of space for small processes, as well as being > > expensive to initialise. It do

Re: [RFC PATCH] powerpc: ideas to improve page table frag allocator

2022-09-05 Thread Christophe Leroy
Le 05/09/2022 à 10:50, Nicholas Piggin a écrit : > The page table fragment allocator is a simple per-mm slab allocator. > It can be quite wasteful of space for small processes, as well as being > expensive to initialise. It does not do well at NUMA awareness. > > This is a quick hack at address

[RFC PATCH] powerpc: ideas to improve page table frag allocator

2022-09-05 Thread Nicholas Piggin
The page table fragment allocator is a simple per-mm slab allocator. It can be quite wasteful of space for small processes, as well as being expensive to initialise. It does not do well at NUMA awareness. This is a quick hack at addressing some of those problems, but it's not complete. It doesn't