On Tuesday 26 January 2010, Pavel Machek wrote: > Hi! > > > > I noticed when we enter sleep states, it seems there's always a > > > sys_sync given. > > > > > > When having an embedded system doing WOL (already in laptop mode to > > > cache > > > all the writes), it reasonable to wake up dozens of times of day and > > > quickly go back to sleep. If the disk is not spun up, > > > and there's some work to be done, won't the sys_sync spin up the disk > > > before going to sleep? > > > > > > It would be good to have a knob (in /sys) you can tweak from usespace to > > > > > > configure the behavior of whether you want to do a sync when entering > > > sleep. > > > > > > The ideal behavior would be: > > > > > > if(disk is spun up) > > > then let the sync happen > > > > I'm not against that. Patch welcome. :-) > > I'd say such knob would be ugly. Define "ugly", please. > But maybe acceptable way would be echo mem-nosync > power, or maybe it can > already be done using s2disk ioctl interface...? Nope. Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
