RFR: 8263236: runtime/os/TestTracePageSizes.java fails on old kernels [v6]

[Thomas Stuefe]

On Thu, 6 May 2021 18:15:29 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> See the bug report for details. On some kernels, we have trouble parsing madvise tags from `/proc/smaps`.
>> 
>> Additional testing:
>>  - [x] Test with kernel 5.4.0 (still passes)
>>  - [x] Test with kernel 4.9.0 (used to fail, now passes)
>>  - [x] Test with kernel 4.15 (still passes)
>>  - [x] Test with kernel 4.14.17 (used to fail, now passes)
>
> Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Even simpler patch

Hah. Beautiful. And somewhat ironic, what are the odds that the offending patch was actually a workaround for a hotspot issue.

+1.

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PR: https://git.openjdk.java.net/jdk/pull/3415