Re: [PATCH bpf-next v1 4/9] bpf: Introduce sleepable tracepoints

[Yonghong Song]

On 3/2/22 1:30 PM, Alexei Starovoitov wrote:
> On Wed, Mar 2, 2022 at 1:23 PM Yonghong Song <yhs@xxxxxx> wrote:
> > On 2/25/22 3:43 PM, Hao Luo wrote:
> > > Add a new type of bpf tracepoints: sleepable tracepoints, which allows
> > > the handler to make calls that may sleep. With sleepable tracepoints, a
> > > set of syscall helpers (which may sleep) may also be called from
> > > sleepable tracepoints.
> >
> > There are some old discussions on sleepable tracepoints, maybe
> > worthwhile to take a look.
> >
> > https://lore.kernel.org/bpf/20210218222125.46565-5-mjeanson@xxxxxxxxxxxx/T/
>
> Right. It's very much related, but obsolete too.
> We don't need any of that for sleeptable _raw_ tps.
> I prefer to stay with "sleepable" name as well to
> match the rest of the bpf sleepable code.
> In all cases it's faultable.

sounds good to me. Agree that for the bpf user case, Hao's 
implementation should be enough.