mmc: block: bonnie++ runs with errors on arc/hsdk board

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Hi Vineet,

On Thu, 2018-03-15 at 09:38 -0700, Vineet Gupta wrote:
> On 03/15/2018 02:27 AM, Adrian Hunter wrote:
> > Please try:
> > 
> > 	perf record -a -e mmc:* -- bonnie++ -u root -r 256 -s 512 -x 1 -d /mnt
> > 
> > and share the resulting perf.data file when you are able
> > to reproduce the hung task message.
> > 
> > You may want to add this patch first:
> > 
> > 	https://marc.info/?l=linux-mmc&m=152110580324200
> 
> While this SoC has perf counters, Unfortunately the overflow interrupts are not 
> wired up. We can do perf stats but not sampling.

I guess here Adrian was asking for pure software MMC-related events which are
orthogonal to CPU's perf interrupts.

Adrian?

-Alexey


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