> 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. _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
