Re: [Qemu-devel] PATCH: enabling TCP keepalives - v3

[Paul Brook]

> I don't think an option is very useful.  If you lose your connection and
> now have a bunch of orphan connections, it's too late to have the
> foresight to have used an option on startup.  In that case, it would be
> much better to just be able to close existing connections.
>
> I think there's a very, very small number of people that would have the
> foresight to always use keepalive=60 or whatever the option would be.

In that case we should do nothing. Users with a flakey net connection can 
tweak their kernel (via /proc/sys) to use lower timeouts. AFAICS There's no 
way qemu can know what a "better" value is. As a concrete example my ADSL 
connection takes between 90 and 180 seconds to resync after a noise spike, so 
60 seconds is absolutely the wrong timeout value here.

Paul