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SubjectRe: [PATCH] perf stat: Fix default logfd to use stderr
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Hi, Robert

On Mon, 18 Jun 2012 16:51:08 +0200, Robert Richter wrote:
> On 29.09.11 18:48:01, Arnaldo Carvalho de Melo wrote:
>> From: Jim Cromie <jim.cromie@gmail.com>
>>
>> This perf stat option emulates valgrind's --log-fd option, allowing the
>> user to send perf results elsewhere, and leaving stderr for use by the
>> program under test. This complements --output file option, and is
>> mutually exclusive with it.
>>
>> 3>results perf stat --log-fd 3 -- $cmd
>> 3>>results perf stat --log-fd 3 --append -- $cmd
>>
>> The perl distro's make test.valgrind target uses valgrind's --log-fd
>> option, I've adapted it to invoke perf also, and tested this patch
>> there.
>>
>> Link: http://lkml.kernel.org/r/1315437244-3788-2-git-send-email-jim.cromie@gmail.com
>> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
>> Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
>> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
>
> With certain shell redirections this (56f3bae) fails with a log fd
> setup failure. Fix below.
>

It looks somewhat related to Stephane's patch. Can you we check it too?

http://lkml.indiana.edu/hypermail/linux/kernel/1205.1/04232.html

Thanks,
Namhyung


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