Messages in this thread | | | Subject | Re: [PATCH V7 1/4] perf/core: Add PERF_SAMPLE_DATA_PAGE_SIZE | From | "Liang, Kan" <> | Date | Thu, 17 Sep 2020 18:16:15 -0400 |
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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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