[issue21116] Failure to create multiprocessing shared arrays larger than 50% of memory size under linux

[Antoine Pitrou]

Antoine Pitrou added the comment:

Actually, recent POSIX states unconditionally that:

« If the file previously was smaller than this size, ftruncate() shall increase the size of the file. If the file size is increased, the extended area shall appear as if it were zero-filled. »

(from http://pubs.opengroup.org/onlinepubs/9699919799/functions/ftruncate.html)

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