Re: [PATCH bpf-next 3/3] bpf: verifier: allocate idmap scratch in verifier env

From: Edward Cree
Date: Thu Apr 29 2021 - 10:52:53 EST

On 29/04/2021 14:46, Lorenz Bauer wrote:
> func_states_equal makes a very short lived allocation for idmap,
> probably because it's too large to fit on the stack. However the
> function is called quite often, leading to a lot of alloc / free
> churn. Replace the temporary allocation with dedicated scratch
> space in struct bpf_verifier_env.
> Signed-off-by: Lorenz Bauer <lmb@xxxxxxxxxxxxxx>
Acked-by: Edward Cree <ecree.xilinx@xxxxxxxxx>