Re: SO_KEEPALIVE - a solution for where X servers are shut down?

by default the keepalive interval is 2 hours (rfc1122) I doubt this is what 
you are looking for.
----- Original Message ----- 
From: "Nick Hill" <[email protected]>
To: <[email protected]>
Sent: Friday, June 10, 2005 8:52 AM
Subject: SO_KEEPALIVE - a solution for where X servers are shut down?


> The problem:
> When running X programs to a remote X server, if the remote X server
> stops being available, the programs which were being displayed often
> stay running. This results in many stale programs running and using
> resources.
>
> It appears that by default, xlibs opens TCP sockets to remote X servers
> without setting SO_KEEPALIVE.
>
> If SO_KEEPALIVE is set, the kernel will send periodic pings through the
> TCP connection. If the other end fails to respond for some time, the TCP
> socket is closed.
>
> If the TCP socket is closed by the kernel, will X apps also close,
> thereby freeing redundant resources?
>
> If this would work, can anyone consider a reason not to enable 
> SO_KEEPALIVE?
>
> Are there run-time options for SO_KEEPALIVE or will the option need to
> be set at source level or compile time?
>
> If editing source code is required, is there one function responsible
> for opening all X TCP sockets, or would it be a complex task to edit
> Xlibs to enable SO_KEEPALIVE?
>
> _______________________________________________
> Devel mailing list
> [email protected]
> http://XFree86.Org/mailman/listinfo/devel
>