On Wed, Mar 30, 2022 at 8:25 AM Lukas Wunner <lukas@xxxxxxxxx> wrote: > > On Tue, Mar 29, 2022 at 08:07:51PM -0600, Keith Busch wrote: > > Thanks, I agree we should improve shutdown times. I tried a while ago, but > > lost track to follow up at the time. Here's the reference, fwiw, though it > > may be out of date :): > > > > http://lists.infradead.org/pipermail/linux-nvme/2014-May/000826.html > > > > The above solution is similiar to how probe waits on an async domain. > > Maybe pci can schedule the async shutdown instead of relying on low-level > > drivers so that everyone implicitly benefits instead of just nvme? I'll > > double-check if that's reasonable, but I'll look through this series too. > > Using the async API seems much more reasonable than adding new callbacks. > > However I'd argue that it shouldn't be necessary to amend any drivers, > this should all be doable in the driver core: Basically a device needs > to wait for its children and device links consumers to shutdown, apart > from that everything should be able to run asynchronously. Well, this is done already in the system-wide and hibernation paths. It should be possible to implement asynchronous shutdown analogously.
