[Bug 217138] head (e.g.) -r314638 for arm64: sh vs. jemalloc asserts: include/jemalloc/internal/tsd.h:687: Failed assertion: "tsd_booted" once swapped in after being swapped out (comment 10)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217138

--- Comment #29 from Mark Millard <markmi at dsl-only.net> ---
Created attachment 181044
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=181044&action=edit
Program showing posix_madvise with POSIX_MADV_WILLNEED can prevent the failure

posix_madvise(.,.,POSIX_MADV_WILLNEED) in the child process
after the fork but before the sleep/swap-out avoids the failure.

In the parent process it makes no difference.

The .,. is the address and size for a memory region that is
to avoid the problem.

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