On Wed, Nov 04, 2009 at 11:18:05AM +0900, KOSAKI Motohiro wrote: > > On Wed, Oct 07, 2009 at 01:14:10PM +1100, Daniel Pittman wrote: > > > For what it is worth, I would also be quite interested to know > > > /why/ XFS is bad in this regard. Is it just the previously > > > stated "XFS writes to disk despite freezing kernel threads" > > > issue, or something deeper? > > > > sync pushes out all data to disk, but in a journaling filesystem > > that might just but the log not the "normal" place on disk. For > > a boot loader to deal with it properly it actually needs to do > > an replay of the log. Grub does so for reiserfs but not for XFS > > for some reason. I don't know why problems don't trigger more > > often with ext3, though. > > I'm sorry for the long delayed and offtopic responce. I discussed > this issue with okuji-san (GRUB2 maintainer) at several month ago. > He really wish linux implement real sync. > > A bootloader has much constraint than OS (mainly caused by size > constraint). it can't implemnt jornal log replay logic for _all_ > filesystem. Why can't we implement storong sync syscall? I don't > think this is PM nor bootloader fault. We already have an ioctl that does what you want: FIFREEZE. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
