Re: Freezer Patches.

[Pavel Machek <pavel@ucw.cz>]

Hi!

> > Whatever you guys decide to do (I actually do sys_sync() before freezing
> > on pmac and yes, it takes sometimes way too long), to be uber-safe, we
> > could/should _also_ do sync after freezing userland processes and before
> > freezing kernel threads (that is, splitting here). In fact, that would
> > help also avoid deadlocks where a frozen kernel thread is holding a
> > semaphore preventing a process from freezing.
> > 
> > That way, if we sys_sync() once processes are sleeping and before kernel
> > threads are, we pretty-much make sure no new dirty buffer will appear.
> > 
> > Anyway, that's mostly food for thoughts at this point
> 
> I fully agree, and that's what I'm already doing. Nothing I can do about
> Pavel not seeing logic, so guess I just have to hope everyone else does
> :)

I think I see your logic, and it is wrong. Anyway, just do not touch
fork/exit hot paths.
								Pavel