Re: [RFC] Yield in netlink_broadcast when congested

[Thomas Graf <tgraf@xxxxxxx>]

* Herbert Xu <20041017073957.GA21632@xxxxxxxxxxxxxxxxxxx> 2004-10-17 17:39
> On Sun, Oct 17, 2004 at 01:51:37AM +0200, Thomas Graf wrote:
> > > So here is my proposal: if we detect signs of impending congestion
> > > in netlink_broadcast(), and that we're in a sleepable context, then
> > > we yield().
> > 
> > Up to how many receivers does that work? We would still see the
> > effect if too many receivers are registered, right?
> 
> Assuming the scheduler is fair then every listener should get their
> time slice to receive the messages.

Assuming there is only a few listeners per process. I tried it out and
my UP system could handle 7 listeners in the same process but would
sporadically overrun above. I couldn't reproduce it with 1 listener
per process anymore.

Therefore I guess this is fine for now, the problem might appear again
if someone finally writes the netlink daemon to solve the locking
problems.