On 2024-11-16 08:01:49-0800, Alexei Starovoitov wrote: > On Sat, Nov 16, 2024 at 1:21 AM Sebastian Andrzej Siewior > <bigeasy@xxxxxxxxxxxxx> wrote: > > > > On 2024-11-15 23:29:31 [+0100], Thomas Gleixner wrote: > > > IIRC, BPF has it's own allocator which can be used everywhere. > > > > Thomas Weißschuh made something. It appears to work. Need to take a > > closer look. > > Any more details? > bpf_mem_alloc is a stop gap. It is indeed using bpf_mem_alloc. It is a fairly straightforward conversion, using one cache for intermediate and one for non-intermediate nodes. I'll try to send it early next week. > As Vlastimil Babka suggested long ago: > https://lwn.net/Articles/974138/ > "...next on the target list is the special allocator used by the BPF > subsystem. This allocator is intended to succeed in any calling > context, including in non-maskable interrupts (NMIs). BPF maintainer > Alexei Starovoitov is evidently in favor of this removal if SLUB is > able to handle the same use cases..." > > Here is the first step: > https://lore.kernel.org/bpf/20241116014854.55141-1-alexei.starovoitov@xxxxxxxxx/
