[issue11999] sporadic failure in test_mailbox on FreeBSD

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

Isn't this a bit out of scope for the mailbox module, though?  Mailbox is getting called at irregular intervals, and a clock monitor really wants to be a polling daemon of some sort, I think.  In which case a complete application system that used the mailbox library could adjust the _skewtime appropriately based on the output of a daemon, if it really cares that much.

I think we're well into YAGNI territory, though.  We are only concerned about how long one second is to the filesystem, and a filesystem that skews or jitters more than a tenth of a second over one second is probably pathological anyway.

As for the two second filesystem, my understanding is that is the FAT file system, and I say we just declare using maildir on FAT to be unsupported.  (But I suppose that should be documented).

(As a side note, atime on FAT has a resolution of 1 day, which kind of screws up your "new mail" signal....)

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