Re: [PATCH] perf: Introduce function to report unsupported syscall attribute flags

[Andi Kleen]

Peter Zijlstra <peterz@xxxxxxxxxxxxx> writes:

> On Wed, 2012-09-12 at 13:01 +0200, Robert Richter wrote:
>> +       if (notsup)
>> +               pr_warn("perf: unsupported attribute flags: %016llx\n", notsup); 
>
> This is a dmesg DoS..
>
> I'm also not sure dmesg is the right way.. could we not somehow change
> the attrs to provide better diagnostic?

Have a output argument for a string, that is then printed by the user tool?

I agree it's a problem today, i usually have to resort to ftrace to
figure out what'swrong.

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only
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