RFR: 8284950: CgroupV1 detection code should consider memory.swappiness

[xpbob]

On Wed, 20 Apr 2022 06:53:39 GMT, Ioi Lam <iklam at openjdk.org> wrote:

>> set memory.swappiness to 0,swap space will not be used 
>> determine the value of memory.swappiness
>> https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt
>> 
>> 
>>     Memory Limit: 50.00M
>>     Memory Soft Limit: Unlimited
>>     Memory & Swap Limit: 100.00M
>>     Maximum Processes Limit: 4194305 
>> 
>> =>
>> 
>>     Memory Limit: 50.00M
>>     Memory Soft Limit: Unlimited
>>     Memory & Swap Limit: 50.00M
>>     Maximum Processes Limit: 4194305
>
> I changed the [JBS issue](https://bugs.openjdk.java.net/browse/JDK-8284900) summary to "CgroupV1 detection code should consider memory.swappiness"

@iklam , are you also fine with the latest change? Thanks.

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PR: https://git.openjdk.java.net/jdk/pull/8285