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SubjectRe: [PATCH V7 1/4] perf/core: Add PERF_SAMPLE_DATA_PAGE_SIZE
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On 9/17/2020 6:02 PM, Dave Hansen wrote:
>> The problem is that the warning from the perf tool usually includes some
>> hints regarding the cause of the warning or possible solution to
>> workaround/fix the warning. What message should we deliver to the users?
>> "Warning: Too many error page size. Address space isolation feature may
>> be enabled, please check"?
> That's not particularly actionable for an end user. Do any of the perf
> errors just tell them to submit a bug report? "Excessive number of page
> size lookup errors, please report to..."

Yes, found some perf tool warnings end with "Consider reporting to
linux-kernel@vger.kernel.org."

I will add a warning "Excessive number of page size lookup errors,
please report to linux-kernel@vger.kernel.org.", if 90% of the samples
have the page size 0.

Thanks,
Kan

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