[issue4681] mmap offset should be off_t instead of ssize_t, and size calculation needs corrected

[Ross Lagerwall]

Ross Lagerwall <rosslagerwall at gmail.com> added the comment:

> will this patch support off_t for "mmap.resize" as well?
> ftruncate uses off_t for the length of a file as well.

No, it doesn't because resize() resizes the amount mmapped in memory which can't be more than ssize_t anyway. However, resizing does work on a 12GiB file with a large offset, e.g. 6GiB.

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