On Tue, 2015-12-15 at 18:43 +0100, Willy Tarreau wrote:

> Ah ? but what does it bring in this case ? I'm not seeing it used
> anywhere on a listening socket. The code took care of not breaking
> them though (ie they still accept if no other socket shows up with
> a higher score). Otherwise we'll have to switch to Tolga's patch,
> unless we find another socket option that can safely be combined
> and which makes sense (I often find it better not to make userland
> depend on new updates of includes when possible).

Socket options set on the listener before the accept() are inherited.

Applications wanting SO_LINGER special settings on all their sockets can
use a single system call right before listen().

Some servers having to deal with TIME_WAIT proliferation very often use
SO_LINGER with timeout 0

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