[oi-dev] /usr/libexec/dovecot/anvil crashes immediately

[Till Wegmueller]

Hello

A quick quote I want to have people keep in mind from the epoll manpage 
'man epoll'

tl;dr epool is for compatibility purposes it is not intended as a full 
features replacement. Please do not use it if possible. It works but 
there will be dragons.

```
The epoll facility is implemented for purposes of offering
        compatibility to and portability of Linux-borne applications; native
        applications should continue to prefer using event ports via the
        port_create(3C), port_associate(3C) and port_getn(3C) 
interfaces.  In
        particular, use of epoll in a multithreaded environment is 
fraught with
        peril; even when using EPOLLONESHOT for one-shot events, there 
are race
        conditions with respect to close(2) that are unresolvable.  (For 
more
        details, see the aborted effort in Linux to resolve this via the
        proposed EPOLL_CTL_DISABLE operation.)  The event port facility 
-- like
        the BSD kqueue facility that inspired it -- is designed to deal with
        such issues via explicit event source dissociation.
```

Greetings
Till

On 12.02.22 17:37, Bob Friesenhahn wrote:
> On Sat, 12 Feb 2022, Stephan Althaus wrote:
>>
>> In the snipplet that Mr Al Slater communicated, it looks like there 
>> are linux-specific epoll details that are not working with illumos. 
>> Apples and apples can be different :-)
> 
> This is quite possible. I should mention that I am running Dovecot in a 
> zone.  I am not quite sure if I am actually using chroot.
> 
>> Have a nice day !
>> P.S. After several weeks of cloudy misty weather the sun is back again 
>> here in Germany. Welcome!!
> 
> Nice to hear.
> 
> Bob