> From: Alexei Starovoitov <ast@xxxxxxxxxx> > > Introduce any context BPF specific memory allocator. > > Tracing BPF programs can attach to kprobe and fentry. Hence they > run in unknown context where calling plain kmalloc() might not be safe. > Front-end kmalloc() with per-cpu per-bucket cache of free elements. > Refill this cache asynchronously from irq_work. GFP_ATOMIC etc is not going to work for you?
