Hi! > > > OTOH I have no idea _how_ we can tell xfs that the processes have been > > > frozen. Should we introduce a global flag for that or something? > > > > I guess XFS should just do all the writes from process context, and > > refuse any writing when its threads are frozen... I actually still > > believe it is doing the right thing, because you can't really write to > > disk from timer. > > As per the recent thread about this, XFS threads suspend correctly > and XFS doesn't issue I/O from timers. > > The problem appears to be per-cpu workqueues that don't get > suspended because suspend does not shut down workqueue threads. You Workqueues should be easy to handle. current->flags &= ~PF_NONFREEZE, and problem should be solved. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
