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linux-next: build failure after merge of the tip tree

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  linux-next: build failure after merge of the tip tree Stephen Rothwell <sfr@canb.auug.org.au> - 2016-12-07 02:40 +0100
    Re: linux-next: build failure after merge of the tip tree Ingo Molnar <mingo@kernel.org> - 2016-12-07 08:50 +0100
      Re: linux-next: build failure after merge of the tip tree Jiri Olsa <jolsa@redhat.com> - 2016-12-07 09:20 +0100
        Re: linux-next: build failure after merge of the tip tree Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-12-07 16:00 +0100
          Re: linux-next: build failure after merge of the tip tree Ingo Molnar <mingo@kernel.org> - 2016-12-07 20:00 +0100
            Re: linux-next: build failure after merge of the tip tree Stephen Rothwell <sfr@canb.auug.org.au> - 2016-12-07 21:50 +0100

#1537405 — linux-next: build failure after merge of the tip tree

Hi all,

After merging the tip tree, today's linux-next build (powerpc64le perf)
failed like this:

  LINK     /home/sfr/next/perf/fixdep
/bin/sh: 1: /home/sfr/next/perf//fixdep: Permission denied
tools/build/Makefile.build:91: recipe for target '/home/sfr/next/perf/pmu-events/jevents.o' failed

$ ls -l /home/sfr/next/perf/fixdep
-rwxr-xr-x 1 sfr users 71104 Dec  7 12:26 /home/sfr/next/perf/fixdep

I am not sure what caused this, but redoing the build succeeded, so I
have just filed this report and left it for today.

-- 
Cheers,
Stephen Rothwell

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#1537588

Cc:-ing Arnaldo, Jiri, Wang Nan and Peter Foley - bug report quoted below.

This bug/race might have been introduced in the latest tooling bits:

  34c4a42791bb Merge tag 'perf-core-for-mingo-20161205' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Which included these build system changes:

triton:~/tip> gll 78987584de42..perf/core
34c4a42791bb Merge tag 'perf-core-for-mingo-20161205' of 
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
bec60e50af83 perf annotate: Show raw form for jump instruction with indirect target
d4dcadec43de perf tools: Add non config targets
207da4739e3e perf tools: Cleanup build directory before each test
0b4d4b076251 perf tools: Move python/perf.so target into rules area
5c319a67b13d perf tools: Move install-gtk target into rules area
2fedf79b69cf tools build: Move tabs to spaces where suitable
a5ba0a1a5af3 tools build: Make the .cmd file more readable
edd695b032ba perf clang: Compile BPF script using builtin clang support
5e08a76525b8 perf clang: Support compile IR to BPF object and add testcase
e67d52d411c3 perf clang: Update test case to use real BPF script
a9495fe9dc63 perf clang: Allow passing CFLAGS to builtin clang
77dfa84a843c perf clang: Use real file system for #include
00b86691c77c perf clang: Add builtin clang support ant test case
d58ac0bf8d1e perf build: Add clang and llvm compile and linking support
c7fb4f62e2a9 tools build: Add feature detection for clang
cb40d55b595c tools build: Add feature detection for LLVM
2bd42de0e196 perf llvm: Extract helpers in llvm-utils.c
8ad85e9e6fda perf tools: Pass context to perf hook functions
baa1973ebcf6 tools build: Fix objtool build with clang
1cd6472e3f8d tools build: Make fixdep parsing wait for last target

Thanks,

	Ingo


* Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Hi all,
> 
> After merging the tip tree, today's linux-next build (powerpc64le perf)
> failed like this:
> 
>   LINK     /home/sfr/next/perf/fixdep
> /bin/sh: 1: /home/sfr/next/perf//fixdep: Permission denied
> tools/build/Makefile.build:91: recipe for target '/home/sfr/next/perf/pmu-events/jevents.o' failed
> 
> $ ls -l /home/sfr/next/perf/fixdep
> -rwxr-xr-x 1 sfr users 71104 Dec  7 12:26 /home/sfr/next/perf/fixdep
> 
> I am not sure what caused this, but redoing the build succeeded, so I
> have just filed this report and left it for today.

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#1537597

On Wed, Dec 07, 2016 at 08:45:14AM +0100, Ingo Molnar wrote:

SNIP

> * Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> 
> > Hi all,
> > 
> > After merging the tip tree, today's linux-next build (powerpc64le perf)
> > failed like this:
> > 
> >   LINK     /home/sfr/next/perf/fixdep
> > /bin/sh: 1: /home/sfr/next/perf//fixdep: Permission denied
> > tools/build/Makefile.build:91: recipe for target '/home/sfr/next/perf/pmu-events/jevents.o' failed
> > 
> > $ ls -l /home/sfr/next/perf/fixdep
> > -rwxr-xr-x 1 sfr users 71104 Dec  7 12:26 /home/sfr/next/perf/fixdep
> > 
> > I am not sure what caused this, but redoing the build succeeded, so I
> > have just filed this report and left it for today.

this seems to be the rare race issue caused by missing fixdep dependency,
caused probably by recompiling of fixdep because of its change in the merge

Arnaldo already carries a fix for this in his latest perf/core, where
we moved the fixdep compilation on top of everything to kill any future
race due to missing fixdep dependency

thanks,
jirka

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#1537792

Em Wed, Dec 07, 2016 at 09:12:15AM +0100, Jiri Olsa escreveu:
> On Wed, Dec 07, 2016 at 08:45:14AM +0100, Ingo Molnar wrote:
> 
> SNIP
> 
> > * Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> > 
> > > Hi all,
> > > 
> > > After merging the tip tree, today's linux-next build (powerpc64le perf)
> > > failed like this:
> > > 
> > >   LINK     /home/sfr/next/perf/fixdep
> > > /bin/sh: 1: /home/sfr/next/perf//fixdep: Permission denied
> > > tools/build/Makefile.build:91: recipe for target '/home/sfr/next/perf/pmu-events/jevents.o' failed
> > > 
> > > $ ls -l /home/sfr/next/perf/fixdep
> > > -rwxr-xr-x 1 sfr users 71104 Dec  7 12:26 /home/sfr/next/perf/fixdep
> > > 
> > > I am not sure what caused this, but redoing the build succeeded, so I
> > > have just filed this report and left it for today.
> 
> this seems to be the rare race issue caused by missing fixdep dependency,
> caused probably by recompiling of fixdep because of its change in the merge
> 
> Arnaldo already carries a fix for this in his latest perf/core, where
> we moved the fixdep compilation on top of everything to kill any future
> race due to missing fixdep dependency

I'll push it today, will stop processing other stuff now and prepare a
pull request,

- Arnaldo
 
> thanks,
> jirka

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#1538003

* Arnaldo Carvalho de Melo <acme@kernel.org> wrote:

> Em Wed, Dec 07, 2016 at 09:12:15AM +0100, Jiri Olsa escreveu:
> > On Wed, Dec 07, 2016 at 08:45:14AM +0100, Ingo Molnar wrote:
> > 
> > SNIP
> > 
> > > * Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> > > 
> > > > Hi all,
> > > > 
> > > > After merging the tip tree, today's linux-next build (powerpc64le perf)
> > > > failed like this:
> > > > 
> > > >   LINK     /home/sfr/next/perf/fixdep
> > > > /bin/sh: 1: /home/sfr/next/perf//fixdep: Permission denied
> > > > tools/build/Makefile.build:91: recipe for target '/home/sfr/next/perf/pmu-events/jevents.o' failed
> > > > 
> > > > $ ls -l /home/sfr/next/perf/fixdep
> > > > -rwxr-xr-x 1 sfr users 71104 Dec  7 12:26 /home/sfr/next/perf/fixdep
> > > > 
> > > > I am not sure what caused this, but redoing the build succeeded, so I
> > > > have just filed this report and left it for today.
> > 
> > this seems to be the rare race issue caused by missing fixdep dependency,
> > caused probably by recompiling of fixdep because of its change in the merge
> > 
> > Arnaldo already carries a fix for this in his latest perf/core, where
> > we moved the fixdep compilation on top of everything to kill any future
> > race due to missing fixdep dependency
> 
> I'll push it today, will stop processing other stuff now and prepare a
> pull request,

Thanks - I pushed the fixes towards linux-next, so tomorrow's (today's) linux-next 
build should not trigger this build race.

Thanks,

	Ingo

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#1538069

Hi all,

On Wed, 7 Dec 2016 19:56:32 +0100 Ingo Molnar <mingo@kernel.org> wrote:
>
> * Arnaldo Carvalho de Melo <acme@kernel.org> wrote:
> 
> > I'll push it today, will stop processing other stuff now and prepare a
> > pull request,  
> 
> Thanks - I pushed the fixes towards linux-next, so tomorrow's (today's) linux-next 
> build should not trigger this build race.

Thanks for the quick response.

-- 
Cheers,
Stephen Rothwell

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