Re: [PATCH bpf-next 2/2] bpf: Skip rcu_barrier() if rcu_trace_implies_rcu_gp() is true

[Yonghong Song <yhs@xxxxxxxx>]

On 12/5/22 8:29 PM, Hou Tao wrote:
> From: Hou Tao <houtao1@xxxxxxxxxx>
>
> If there are pending rcu callback, free_mem_alloc() will use
> rcu_barrier_tasks_trace() and rcu_barrier() to wait for the pending
> __free_rcu_tasks_trace() and __free_rcu() callback.
>
> If rcu_trace_implies_rcu_gp() is true, there will be no pending
> __free_rcu(), so it will be OK to skip rcu_barrier() as well.
>
> Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx>

Acked-by: Yonghong Song <yhs@xxxxxx>