RFR: 8333522: JFR SwapSpace event might read wrong free swap space size

[Matthias Baesken]

On Thu, 6 Jun 2024 09:57:10 GMT, Severin Gehwolf <sgehwolf at openjdk.org> wrote:

> I see that if `sysinfo()` fails the return value might be negative. Should we account for that?


There are a number of places where sysinfo return value check is omitted.  I see 3 places in os_linux.cpp alone.  probably it would be better to check this, but I am not sure why it was omitted and how often those failures occur in practise .

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PR Comment: https://git.openjdk.org/jdk/pull/19574#issuecomment-2152273754