I was debugging my why backup failed to run, and eventually found it was stuck on sync: 14080 18:18 btrfs_tree_read_lock sync
This was hung for hours on this lock. Strangely, it looks like taking my sysrq-w hung the machine pretty hard for close to 30sec, but this seems to have unhung sync and in the end btrfs send completed after that. Sysqrq-w is here: http://marc.merlins.org/tmp/sysrq-btrfs-sync-hang.txt Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
