Re: fanotify - overall design before I start sending patches

Pavel Machek
2009-08-06T10:23:00Z

On Thu 2009-08-06 11:20:57, Douglas Leeder wrote:
> Pavel Machek wrote:
> > On Wed 2009-08-05 17:46:16, Tvrtko Ursulin wrote:
> >> On Wednesday 05 August 2009 03:05:34 Pavel Machek wrote:
>
> >> Just to make sure you haven't missed this - it is not that they have to
> >> complete the whole operation before the timeout period (since you mention
> >> realtime/mlock I suspect this is what you think?), but _during_ the operation
> >> they have to show that they are active by sending something like keep alive
> >> messages.
> >>
> >> Or you are worried about failing to meet even that on a loaded system? There
> >> has to be something like this otherwise hung userspace client would kill the
> >> whole system.
> >
> > Of course, I'm worried about failing to meet this on loaded
> > system. And the fact that I _have_ to worry about that means that
> > interface is ugly/broken.
>
> You mean that in 5 seconds, you won't have any point when you can tell
> the kernel, "I'm still working"?

Yes. Try make -j on your machine one day.
Pavel
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