All it takes is one systemd bug, or any number of other conditions that prevent a proper umount. I have seen various kernel bugs cause it, I have seen the hw operating the disks stop working. In general using ext4+journal and/or xfs under the exact wrong conditions can result in an unbootable system. And those exact wrong conditions happen way too often, the hardware is not perfect, VM datastores fill up, arrays and storage controllers go offline randomly, nodes crash and/or power off and/or lose power and/or overheat suddenly from both kernel bugs and bad hardware and/or missed alarms. If you design a system to fail too often in these cases eventually the system will be abandoned for more robust setups. Saying worked as designed too many times for common conditions results in a system that is not robust, and results in no one wanting to use a given system. On Tue, May 12, 2020 at 7:02 PM Samuel Sieb <samuel@xxxxxxxx> wrote: > > On 5/12/20 4:38 PM, John Mellor wrote: > > Hi Samuel, > > But that's the point. A default install uses LVM, and therefore > > constructs a separate /boot partition running EXT4 with a journal. You > > may of course decide to do your own partitions, but that setup is highly > > unusual and rare. Most people will have the default partitioning, and > > therefore have the kernel upgrade bug. > > Except that I've never heard anyone complain about that. It should not > happen with ext4. If it does, there's a problem. Apparently btrfs is a > little more lax about flushing the journal which has caused problems, > but ext4 is not. If you unmount or remount RO an ext4 filesystem, it > will flush the journal before finishing. So if you're finding that the > journal has not been flushed, then you had an unclean unmount and need > to find out why that's happening. > _______________________________________________ > users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
