Re: [PATCH 1/1] block: Add discard to stats.

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On Thu, May 5, 2016 at 11:29 AM, Jeff Moyer <jmoyer@xxxxxxxxxx> wrote:
> Michael Callahan <coder.callahan@xxxxxxxxx> writes:
>
>> Tested iostat more and it appears to work fine with this patch.
>
> What exactly did you test?  I've got sysstat 10.1.5 here, and with your
> patch, I get no statistics output from iostat -x:
>
> # iostat -x
> Linux 4.6.0-rc5+ (slayer.lab.bos.redhat.com)    05/05/16        _x86_64_        (4 CPU)
>
> avg-cpu:  %user   %nice %system %iowait  %steal   %idle
>            0.31    0.00    0.17    0.52    0.00   99.00
>
> Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s avgrq-sz avgqu-sz   await r_await w_await  svctm  %util
>
> #
>
> I just grabbed 11.3.4, and it also shows the same behavior.
>
> Cheers,
> Jeff

I tried 'iostat -p ALL' with and without the x.  I suppose the code
that automatically determines which devices to display could be
broken.

  Michael
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