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Date:   Fri, 16 Aug 2019 10:24:09 -0700
From:   Andi Kleen <ak@linux.intel.com>
To:     Theodore Ts'o <tytso@mit.edu>
Cc:     Omar Sandoval <osandov@fb.com>, linux-block@vger.kernel.org
Subject: Re: [REGRESSION] commit c2b3c170db610 causes blktests block/002
 failure
Message-ID: <20190816172409.GA3216@tassilo.jf.intel.com>
References: <20190609181423.GA24173@mit.edu>
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> The git bisect log (see attached) pointed at this commit:

bisect must be wrong. The commit only changes the perf tool, so cannot
break anything in the kernel.

-Andi

> 
> commit c2b3c170db610896e4e633cba2135045333811c2 (HEAD, refs/bisect/bad)
> Author: Andi Kleen <ak@linux.intel.com>
> Date:   Tue Mar 26 15:18:20 2019 -0700
> 
>     perf stat: Revert checks for duration_time
>     
>     This reverts e864c5ca145e ("perf stat: Hide internal duration_time
>     counter") but doing it manually since the code has now moved to a
>     different file.
>     
>     The next patch will properly implement duration_time as a full event, so
>     no need to hide it anymore.
>     
>     Signed-off-by: Andi Kleen <ak@linux.intel.com>
>     Acked-by: Jiri Olsa <jolsa@kernel.org>
>     Link: http://lkml.kernel.org/r/20190326221823.11518-2-andi@firstfloor.org
>     Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> 
> Is this a known issue?