linux-kernel - Re: [PATCH v2 07/18] rtla: Introduce common

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Message-ID: <CAP4=nvTeFtHF+K0h0FkWMh6uLb5Qwy6LnYPcrbrbNOM6M6kFNA@mail.gmail.com>
Date: Wed, 7 Jan 2026 14:47:07 +0100
From: Tomas Glozar <tglozar@...hat.com>
To: Wander Lairson Costa <wander@...hat.com>
Cc: Steven Rostedt <rostedt@...dmis.org>, Crystal Wood <crwood@...hat.com>, 
	Ivan Pravdin <ipravdin.official@...il.com>, Costa Shulyupin <costa.shul@...hat.com>, 
	John Kacur <jkacur@...hat.com>, Tiezhu Yang <yangtiezhu@...ngson.cn>, 
	"open list:Real-time Linux Analysis (RTLA) tools" <linux-trace-kernel@...r.kernel.org>, 
	"open list:Real-time Linux Analysis (RTLA) tools" <linux-kernel@...r.kernel.org>, 
	"open list:BPF [MISC]:Keyword:(?:b|_)bpf(?:b|_)" <bpf@...r.kernel.org>
Subject: Re: [PATCH v2 07/18] rtla: Introduce common_restart() helper

st 7. 1. 2026 v 13:43 odesílatel Wander Lairson Costa
<wander@...hat.com> napsal:
> >
> > The deduplication idea is good, but I find the name of the helper
> > quite confusing. The main function of the helper is not to restart
> > tracing, it is to handle a latency threshold overflow - restarting
> > tracing is only one of possible effects, and one that is only applied
> > when using --on-threshold continue which is not the most common use
> > case. Could something like common_handle_stop_tracing() perhaps be
> > better?
> >
>
> Sure, I will change the name in v3.
>

Thanks.

> > > +enum restart_result {
> > > +       RESTART_OK,
> > > +       RESTART_STOP,
> > > +       RESTART_ERROR = -1,
> > > +};
> >
> > Do we really need a separate return value enum just for this one helper?
> >
>
> If it was success/failure type of return value, we wouldn't need.
> However, a three state code, I think it is worth for code readiness.
> Do you have something else in mind?
>

The main loop can simply use the continue flag, just like in the old
version, no need to duplicate that information into the return value
of common_restart().

Tomas