RFR: 8334564: VM startup: fatal error: FLAG_SET_ERGO cannot be used to set an invalid value for NonNMethodCodeHeapSize [v2]

[Lutz Schmidt]

> CodeHeap segment sizes are aligned to page size multiples. This can result in the non-nmethod segment receiving size 0 (zero). Range checking during FLAG_SET_ERGO processing detects that and raises an error, preventing the vm from starting.
> 
> This fix increases the minimum size of the non-nmethod segment to page size, preventing it from being rounded down to zero.
> 
> Verified by manual testing. Nightly tests (mainly to discover unexpected side effects) pending.

Lutz Schmidt has updated the pull request incrementally with one additional commit since the last revision:

  8334564: Remove extra whitespace.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19812/files
  - new: https://git.openjdk.org/jdk/pull/19812/files/53f32a14..585db1b7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19812&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19812&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/19812.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19812/head:pull/19812

PR: https://git.openjdk.org/jdk/pull/19812