Re: [Qemu-devel] resetting a stale VNC connection

[Avi Kivity <avi@redhat.com>]

David Ahern wrote:
> This patch enables TCP keepalives on VNC connections. After 60-seconds
> of idle time, probes are sent every 2 seconds with the connection
> resetting after 4 failed probes. This might be a rather aggressive
> setting -- 8 seconds until connection is reset.
>
>   

I think you are right, it's too aggressive.  Maybe reduce it so it takes 
a minute until we give up.

> Also, I believe this is a linux-specific way of doing this; not sure
> what the posix/windows method is. Open to suggestions.
>   

At the very least, you need to wrap this in a #if defined(...) && 
defined (...) ... so it doesn't break compilation on hosts that don't 
support those socket options.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.