On Mon, Dec 16, 2013 at 8:45 PM, Tejun Heo <t...@kernel.org> wrote: > Hello, > > On Mon, Dec 16, 2013 at 08:12:07PM +0800, Ming Lei wrote: >> Looks we should guarantee that I/O queue is emptied before system sleep, >> otherwise it may be a bug, since battery may be drained up to cause >> data loss or block devices may be disconnected during sleep. > > It's a bit beside the point as that's what journaling is for. Power > loss during suspend isn't all that different from power loss while > suspended. Also, the filesystems are already synced before entering > suspend, so it shouldn't be an issue. However, that doesn't guarantee > there aren't no pending bdi work items. We *hope* to control the
You mean there are still some write I/O scheduled after processes are frozen? by unfreezable kernel threads? > sources with freezer but there's no guarantee about the coverage and > no way to verify that either. Thanks, -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
