On Tue, Oct 3, 2017 at 5:20 PM, Luis R. Rodriguez <mcg...@kernel.org> wrote: > the ordering devised currently there is: > > o device driver pm ops called > o notifier for suspend issued - *going to suspend* > o userspace frozen > o filesystem freeze > > On the way back up this order is inverted: > > o filesystem freeze > o userspace frozen > o notifier for suspend issued - *going to suspend* > o device driver pm ops called
Fortunately I had it a tad bit wrong, but in a good way. Our ordering on our way down is: o notifier for suspend issued - *going to suspend* o userspace frozen o filesystem freeze (new, being proposed) o device driver pm ops called Then on our way up: o device driver pm ops called o filesystem thaw o userspace thaw o notifier for resume issued - *thawing* So the driver callbacks get called *later*, so anything called in notifiers do get a chance to quiesce things properly. Luis
