Yonghong Song wrote:
>
> On 12/11/23 12:34 AM, Hou Tao wrote:
> > From: Hou Tao <houtao1@xxxxxxxxxx>
> >
> > Since commit 638e4b825d52 ("bpf: Allows per-cpu maps and map-in-map in
> > sleepable programs"), sleepable BPF program can also use map-in-map, but
> > maybe_wait_bpf_programs() doesn't handle it accordingly. The main reason
> > is that using synchronize_rcu_tasks_trace() to wait for the completions
> > of these sleepable BPF programs may incur a very long delay and
> > userspace may think it is hung, so the wait for sleepable BPF programs
> > is skipped. Update the comments in maybe_wait_bpf_programs() to reflect
> > the reason.
> >
> > Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx>
>
> Acked-by: Yonghong Song <yonghong.song@xxxxxxxxx>
>
>
Useful info if you are needing this property.
Acked-by: John Fastabend <john.fastabend@xxxxxxxxx>
