[Dovecot] 1.0rc_15 - imap-login disappearing

[Timo Sirainen]

On Wed, 2007-02-28 at 16:15 -0500, Ben Winslow wrote:
> > http://dovecot.org/list/dovecot-cvs/2007-February/007906.html
> >
> > Way too much trouble to try to handle it correctly.
> 
> What about logging a warning and iterating through ioloop->timeouts
> and subtracting (ioloop_time - ioloop_timeval.tv_sec) from each
> next_run.tv_sec?  That way, the absolute worst case would be a
> doubled timeout (e.g. a poll starts with 2 timeouts, one with 9
> seconds remaining, and one with 10 seconds remaining, the time time
> goes backwards, the poll times out, and each timer has 9 seconds
> added to it.)
> 
> Given how infrequently the clock is likely to go
> backwards, the impact would probably be unnoticable, and a doubled
> timeout seems a lot more graceful than dying...  however, there
> might be other things that could break that I don't know about...

Yes, if only the timeouts were the problem that would be easy to fix.
But there exists a lot of code that compares timestamps, and I think
some of that code can break pretty badly.

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