Re: [RFC PATCH 03/10] perf workqueue: add threadpool start and stop functions

From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Riccardo Mancini <rickyman7@gmail.com>
Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>,
	Ian Rogers <irogers@google.com>,
	Namhyung Kim <namhyung@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Mark Rutland <mark.rutland@arm.com>, Jiri Olsa <jolsa@redhat.com>,
	linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Subject: Re: [RFC PATCH 03/10] perf workqueue: add threadpool start and stop functions
Date: Thu, 15 Jul 2021 17:43:58 -0300	[thread overview]
Message-ID: <YPCeDjYxVHXSInZJ@kernel.org> (raw)
In-Reply-To: <b758e519c0fe1336ce01d741b2340734faac7af2.camel@gmail.com>

Em Thu, Jul 15, 2021 at 06:42:16PM +0200, Riccardo Mancini escreveu:
> Hi Arnaldo,
> 
> On Wed, 2021-07-14 at 12:15 -0300, Arnaldo Carvalho de Melo wrote:
> > Em Tue, Jul 13, 2021 at 02:11:14PM +0200, Riccardo Mancini escreveu:
> > > +++ b/tools/perf/util/workqueue/threadpool.c
> > > @@ -4,12 +4,23 @@
> > >  #include <unistd.h>
> > >  #include <errno.h>
> > >  #include <string.h>
> > > +#include <pthread.h>
> > > +#include <signal.h>
> > > +#include <syscall.h>
> > >  #include "debug.h"
> > >  #include "asm/bug.h"
> > >  #include "threadpool.h"
> > >  
> > > +#ifndef HAVE_GETTID
> > > +static inline pid_t gettid(void)
> > > +{
> > > +       return (pid_t)syscall(__NR_gettid);
> > > +}
> > > +#endif

> > Isn't this defined elsewhere? Yeah, when we decide to move it to
> > tools/lib/workqueue/ we'll need it, but for now, reduce patch size.

> No, it's just statically defined in tools/perf/jvmti/jvmti_agent.c.
> I saw there is a libc_compat.h header in tools/include/tools, I could put this
> definition there, and remove the one from jvmti_agent.c.

Please, do it as a prep patch.

Thanks,

- Arnaldo