linux-kernel - Re: [RESEND 3/3] coccicheck: add parallel execution

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Message-ID: <14fc89a6d23764081dc4e94490fdb8ed@farmergreg.com>
Date:	Thu, 12 Jan 2012 11:20:11 -0600
From:	Greg Dietsche <gregory.dietsche@....edu>
To:	Michal Marek <mmarek@...e.cz>
Cc:	<julia@...u.dk>, <gilles.muller@...6.fr>, <npalix.work@...il.com>,
	<rdunlap@...otime.net>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <cocci@...u.dk>
Subject: Re: [RESEND 3/3] coccicheck: add parallel execution

On 12-11-11 02:48pm, Michal Marek wrote:
> On 6.11.2011 03:14, Gregory.Dietsche@....edu wrote:
>> +		coccinelle $f>/tmp/cocci_parallel_$$_$PARALLEL_ID 2>&1 &
>
> This opens a symlink race.
>
> And this whole parallel execution should be done by make. Just have a
> generic rule for getting result from a single check, make the default
> target depend on the list of the wanted results and concatenate the
> results there. make -j will then take of parallelizing it.

Michal,
Sorry for the slow response - my mail filters weren't behaving well at 
all...

For now, lets just drop this patch. I don't have the time to fix it up.
A few months ago I did take a look at what it would mean to use make's 
-j option
and it seemed to me that doing so would require completely changing how 
the coccinelle
script works.

I would like to see my M= patch set merged though:
https://lkml.org/lkml/2011/11/5/94

Thanks,
Greg


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