linux-kernel - Re: [PATCH 22/24] perf tools: Build programs to copy 32-bit compatibility VDSOs

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Message-ID: <5417DFD5.2090707@intel.com>
Date:	Tue, 16 Sep 2014 09:59:33 +0300
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
CC:	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 22/24] perf tools: Build programs to copy 32-bit compatibility
 VDSOs

On 09/15/2014 06:50 PM, Arnaldo Carvalho de Melo wrote:
> Em Mon, Sep 15, 2014 at 12:47:52PM -0300, Arnaldo Carvalho de Melo escreveu:
>> Em Fri, Aug 15, 2014 at 10:08:57PM +0300, Adrian Hunter escreveu:
>>
>>> perf tools copy VDSO out of memory.  However, on 64-bit machines there
>>> may be 32-bit compatibility VDOs also.  To copy those requires
>>> separate 32-bit executables.  This patch adds to the build additional
>>> programs perf-read-vdso32 and perf-read-vdsox32 for 32-bit and x32
>>> respectively.
>>  
>>> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
>> <SNIP>
>>>  tools/perf/config/feature-checks/test-compile.c |  4 +++
>> <SNIP>
>>>  8 files changed, 149 insertions(+), 37 deletions(-)
>> <SNIP>
>>>  create mode 100644 tools/perf/config/feature-checks/test-compile.c
>> <SNIP>
>>
>>
>> In resolving conflicts that happen because I haven't merged some other
>> files (thread_stack, etC) I noticed that this patch introduces something
>> that is explicitely listed in a .gitignore file:
>>
>> [acme@zoo linux]$ git show d316f16dddd8c7780c727bbd507338e4147c9280
>> commit d316f16dddd8c7780c727bbd507338e4147c9280
>> Author: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
>> Date:   Fri Aug 15 22:08:59 2014 +0300
>>
>>     perf tools: Add feature checks to .gitignore
>>
>> <SNIP>
>>
>> +++ b/tools/perf/.gitignore
>> @@ -24,3 +24,4 @@ config.mak.autogen
>>  *-flex.*
>>  *.pyc
>>  *.pyo
>> +config/feature-checks/test-*
>> [acme@zoo linux]$
>>
>>
>> So I think we should use some different name for this test-compile.c
>> file?

The name is ok.

>>
>> I'll leave those two csets out of this pull req, so that you can rebase
>> what is left on top of what is being merged and we can do one more
>> progress step in having all this merged, ok?
> 
> Since we can't ignore all test- prefixed files there, I'm removing the
> patch that added it to .gitignore as well:
> 
> commit d316f16dddd8c7780c727bbd507338e4147c9280
> Author: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
> Date:   Fri Aug 15 22:08:59 2014 +0300
> 
> Aftewards I'll revisit this, because without this .gitignore patch I
> think your patch will be ok.

The .gitignore patch is wrong.  I picked it up because Alex had it in
his tree but it must be very old because it was superseded by:

commit 56560ec692c142bb9ee404764e3b67999031ad19
Author: Chunwei Chen <tuxoko@...il.com>
Date:   Sat Dec 21 13:48:11 2013 +0800

    perf config: Ignore generated files in feature-checks
    
    1. Rename the test-* binary files to test-*.bin for easier pattern matching as
       suggested by Ingo.
    2. Ignore *.bin and *.d files.
    
    Signed-off-by: Chunwei Chen <tuxoko@...il.com>
    Reviewed-by: Ingo Molnar <mingo@...nel.org>
    Acked-by: Jiri Olsa <jolsa@...hat.com>
    Cc: Ingo Molnar <mingo@...nel.org>
    Cc: Jiri Olsa <jolsa@...hat.com>
    Link: http://lkml.kernel.org/r/52B52B9B.50708@gmail.com
    Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>



> 
> - Arnaldo
>  
>> I mean:
>>
>>>> Up-to-date versions can be found from 15 August:
>>>>
>>>>      patchwork:
>>>>
>>>>              https://patchwork.kernel.org/patch/4729131/
>>>>              https://patchwork.kernel.org/patch/4729111/
>>
>>
>> - Arnaldo
> 
> 

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