On Mon, May 29, 2017 at 7:40 AM, Hyunchul Lee <hyc.lee@xxxxxxxxx> wrote: > > and I missed the following case. > > in some embedded systems, clean-up for shutdown should be fast. > during this clean-up, freeze file system to guarantee integrity. > umount with MNT_DETACH is not suitable because of not killing tasks. > Interesting point. It seems that good old "sync; reboot" does not cut it anymore. Not even emergency remount read-only sysrq trigger. Some of you may have been following this thread on fsdevel: https://www.spinics.net/lists/linux-xfs/msg06953.html Probably less have been following this longer thread on xfs list: https://www.spinics.net/lists/linux-xfs/msg06883.html
