From: "Luis R. Rodriguez" <mcgrof@kernel.org>
To: Julia Lawall <julia.lawall@lip6.fr>
Cc: "Luis R. Rodriguez" <mcgrof@kernel.org>,
Gilles Muller <Gilles.Muller@lip6.fr>,
nicolas.palix@imag.fr, mmarek@suse.com,
linux-kernel@vger.kernel.org, cocci@systeme.lip6.fr
Subject: Re: [PATCH 4/4] coccicheck: add indexing enhancement options
Date: Wed, 15 Jun 2016 17:36:37 +0200 [thread overview]
Message-ID: <20160615153637.GK11948@wotan.suse.de> (raw)
In-Reply-To: <alpine.DEB.2.10.1606150937540.2887@hadrien>
On Wed, Jun 15, 2016 at 09:39:49AM +0200, Julia Lawall wrote:
>
>
> On Wed, 15 Jun 2016, Luis R. Rodriguez wrote:
>
> > On Tue, Jun 14, 2016 at 11:17:13PM +0200, Julia Lawall wrote:
> > >
> > >
> > > On Tue, 14 Jun 2016, Luis R. Rodriguez wrote:
> > >
> > > > On Tue, Jun 14, 2016 at 10:47:32PM +0200, Julia Lawall wrote:
> > > > >
> > > > >
> > > > > On Tue, 14 Jun 2016, Luis R. Rodriguez wrote:
> > > > >
> > > > > > On Tue, Jun 14, 2016 at 07:22:03AM +0200, Julia Lawall wrote:
> > > > > > >
> > > > > > >
> > > > > > > On Mon, 13 Jun 2016, Luis R. Rodriguez wrote:
> > > > > > >
> > > > > > > > On Mon, Jun 13, 2016 at 09:50:15PM +0200, Julia Lawall wrote:
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > On Mon, 13 Jun 2016, Luis R. Rodriguez wrote:
> > > > > > > > > >
> > > > > > > > > > I'll redirect stderr to stdout by default when parmap support is used then.
> > > > > > > > >
> > > > > > > > > Usually I put them in different files.
> > > > > > > >
> > > > > > > > We can do that as well but I would only want to deal with parmap support
> > > > > > > > case. Any preference? How about .coccicheck.stderr.$PID where PID would
> > > > > > > > be the PID of the shell script?
> > > > > > >
> > > > > > > I don't understand the connection with parmap.
> > > > > >
> > > > > > When parmap support is not available the cocciscript will currently
> > > > > > disregard stderr, output is provided as it comes to stdout from each
> > > > > > thread I guess.
> > > > >
> > > > > Deepa's recent patch to coccicheck made apparent that Coccicheck uses
> > > > > --very-quiet, so there is standard error.
> > > >
> > > > OK I'm disegarding the redirect for non-parmap for now but we'd have to
> > > > determine if we want to append or add one per PID... I rather leave that
> > > > stuff as-is and encourage folks to upgrade coccinelle.
> > >
> > > If coccicheck is using --very-quiet, there will not be much stderr of
> > > interest when using parmap either.
> >
> > OK I don't follow. Does coccinelle only direct error to stderr when --very-quiet
> > is used ? Or does using --very-quiet suppress stderr ?
>
> --very-quiet suppresses most administrative messages that go to stderr.
> There are still actual errors. Bu you don't see eg what file is being
> currently processed.
OK thanks. I remove --very-quiet now if --profile is used within SPFLAGS, I'll extend
this to also avoid --very-quiet if --show-trying is used. SPFLAGS is where you can
specify extra options that the script doesn't specifically support.
> > > > > > > Originally our use of parmap made output, specia files based on pids. Maybe this
> > > > > > > is the default for parmap. I found this completely unusable. I guess one
> > > > > > > could look at the dates to see which file is the most recent one, but it
> > > > > > > seems tedious. If you are putting the standard output in x.out, then put
> > > > > > > the standard error in x.err.
> > > > > >
> > > > > > I'll use ${DIR}/coccicheck.$$.err for stderr.
> > > > >
> > > > > What is ${DIR}? and what is $$?
> > > >
> > > > When you run scripts/coccicheck we take the absolute directory
> > > > of it and then go down one level of directory, so in this case it
> > > > would be the base directory of the Linux kernel.
> > > >
> > > > $$ is the PID of the bash script.
> > >
> > > OK. I still don't find PIDs useful, but I guess if we are talking about
> > > the entire output of coccicheck, there is not much else to do. Normally,
> > > I don't want these files accumulating, and just write over the old ones.
> >
> > Which is why I would much prefer to instead just redirect in coccicheck
> > case stderr to stdout from coccinelle. Is that preferred?
>
> Then things will be merged in strange ways.
>
> Why not just let the user decide what to do with these things?
Sure, what should be the default?
Luis
next prev parent reply other threads:[~2016-06-15 15:36 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-10 20:42 [PATCH 0/4] scripts/coccicheck: add paramap and indexing options Luis R. Rodriguez
2016-06-10 20:42 ` [PATCH 1/4] coccicheck: move spatch binary check up Luis R. Rodriguez
2016-06-10 20:42 ` [PATCH 2/4] coccicheck: enable paramap support Luis R. Rodriguez
2016-06-11 5:45 ` [Cocci] " SF Markus Elfring
2016-06-11 5:55 ` Julia Lawall
2016-06-10 20:42 ` [PATCH 3/4] scripts: add glimpse.sh for indexing the kernel Luis R. Rodriguez
2016-06-11 17:09 ` [Cocci] " SF Markus Elfring
2016-06-10 20:42 ` [PATCH 4/4] coccicheck: add indexing enhancement options Luis R. Rodriguez
2016-06-10 21:02 ` Julia Lawall
2016-06-10 21:18 ` Luis R. Rodriguez
2016-06-10 21:21 ` Julia Lawall
2016-06-10 21:43 ` [Cocci] " Wolfram Sang
2016-06-10 21:49 ` Luis R. Rodriguez
2016-06-10 21:51 ` Wolfram Sang
2016-06-10 22:08 ` Luis R. Rodriguez
2016-06-10 22:25 ` Luis R. Rodriguez
2016-06-11 5:46 ` Wolfram Sang
2016-06-11 5:54 ` Julia Lawall
2016-06-11 6:09 ` Wolfram Sang
2016-06-13 18:37 ` Luis R. Rodriguez
2016-06-13 18:55 ` Wolfram Sang
2016-06-13 19:48 ` Julia Lawall
2016-06-13 21:22 ` Luis R. Rodriguez
2016-06-14 5:08 ` Julia Lawall
2016-06-11 5:18 ` Julia Lawall
2016-06-11 5:58 ` Wolfram Sang
2016-06-11 6:05 ` Julia Lawall
2016-06-11 5:24 ` Julia Lawall
2016-06-13 18:39 ` Luis R. Rodriguez
2016-06-11 5:17 ` Julia Lawall
2016-06-13 19:35 ` Luis R. Rodriguez
2016-06-13 19:50 ` Julia Lawall
2016-06-13 21:28 ` Luis R. Rodriguez
2016-06-14 5:22 ` Julia Lawall
2016-06-14 19:27 ` Luis R. Rodriguez
2016-06-14 20:47 ` Julia Lawall
2016-06-14 21:10 ` Luis R. Rodriguez
2016-06-14 21:17 ` Julia Lawall
2016-06-14 22:02 ` Luis R. Rodriguez
2016-06-15 7:39 ` Julia Lawall
2016-06-15 15:36 ` Luis R. Rodriguez [this message]
2016-06-15 15:44 ` Julia Lawall
2016-06-15 17:53 ` Luis R. Rodriguez
2016-06-11 5:55 ` [Cocci] " SF Markus Elfring
2016-06-11 5:27 ` [Cocci] [PATCH 0/4] scripts/coccicheck: add paramap and indexing options SF Markus Elfring
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