thread_pthread.c:1948

• The compile-time check for PTHREAD_STACK_DEFAULT size has been removed; please ensure that the default thread stack size is validated elsewhere or that this removal won't allow insufficient stack sizes in some environments.

# if PTHREAD_STACK_DEFAULT < RUBY_STACK_SPACE*5

thread_pthread.c:2054

• By eliminating the reserved space calculation, the thread now uses the full stack size; please verify that this change does not increase the risk of stack overflow or negatively interfere with stack overflow detection logic.

nt->machine_stack_maxsize = stack_size;

thread_pthread.c:3150

• The removal of the division by RUBY_STACK_SPACE_RATIO in the stack overflow detection may affect overflow behavior; confirm that the modified logic still correctly detects stack overflows.

size /= RUBY_STACK_SPACE_RATIO;