RFR: 8333871: check sysinfo return values [v2]

[David Holmes]

On Fri, 14 Nov 2025 11:07:20 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> In the review of [JDK-8333522](https://bugs.openjdk.org/browse/JDK-8333522) it has been discussed that we might run into issues because of failing sysinfo.
>> However we miss checking the return values at some places, this might need adjustment.
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   0 - terminate not needed

I think this is completely unnecessary - `sysinfo`  on Linux can't really fail, the only error possible is EFAULT if you pass a bad pointer for the struct - so don't do that.

Replacing numbers with words in the logging could break external parsing scripts.

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PR Comment: https://git.openjdk.org/jdk/pull/28317#issuecomment-3539576209