linux-kernel - Re: [GIT PULL 00/38] perf/core improvements and fixes

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Message-ID: <20131205110530.GD21600@krava.brq.redhat.com>
Date:	Thu, 5 Dec 2013 12:05:30 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...radead.org>,
	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	David Ahern <dsahern@...il.com>,
	Dongsheng Yang <yangds.fnst@...fujitsu.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [GIT PULL 00/38] perf/core improvements and fixes

On Thu, Dec 05, 2013 at 11:53:44AM +0100, Ingo Molnar wrote:

SNIP

> 
> I saw it again on a system by running two parallel build jobs:
> 
>   D=/tmp/perf-1; mkdir -p $D; while make O=$D install; do make O=$D clean; done
>   D=/tmp/perf-2; mkdir -p $D; while make O=$D install; do make O=$D clean; done
> 
> one failed with:
> 
>   BUILD    PLUGIN plugin_kmem.so
> make[2]: *** [sub-make] Error 2
> make[1]: *** [/tmp/perf-1/libtraceevent.a] Error 2
> make[1]: *** Waiting for unfinished jobs....
>   BUILD    PLUGIN plugin_kvm.so
> 
> the other with:
> 
>   CC FPIC  plugin_cfg80211.o
>   CC       /tmp/perf-2/builtin-help.o
>   CC       /tmp/perf-2/builtin-sched.o
> plugin_sched_switch.o: file not recognized: File truncated
> collect2: error: ld returned 1 exit status
> make[3]: *** [plugin_sched_switch.so] Error 1  BUILD    PLUGIN plugin_function.so
> 
> 
> and that's clearly the new plugin code.

yes, I reproduced... looks like 'plugins' target is racing
with 'install_plugins' target.. both ending up building
same objects at the same time

working on fix

thanks,
jirka
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