Hallo, I wrote am 31.10.10 zum Thema btrfs-convert fails:
> I've tried to convert a 12 GByte ext2 partition (nearly full, 280 > MByte free) with btrfs-convert. > After about 15 minutes (700-MHz-CPU) the system tells > ... > creating ext2fs image file > cleaning up system chunk > btrfs-convert: extent-tree.c:2529: btrfs_reserve_extent: Assertion > `!(ret)' failed > Abgebrochen Next try: about 11 GByte data, about 690 MByte free: same crash. > "syslogd" tells > Oct 31 17:43:16 ElNath kernel: ------------[ cut here ]------------ > Oct 31 17:43:17 ElNath kernel: kernel BUG at fs/btrfs/volumes.c:2831! > Oct 31 17:43:17 ElNath kernel: invalid opcode: 0000 [#1] > Oct 31 17:43:17 ElNath kernel: last sysfs file: > /sys/devices/pci0000:00/0000:00:04.0/0000:08:02.0/0000:09:00.0/class [etc.] These syslogd messages come when I try to mount the incompletely converted partition. And then the system needs to be restarted ... mounting doesn't work, "halt" or "reboot" doesn't work. ------------------------------------------------ Another experiment: when the partition (about 11.7 GByte) is filled with about 9 GByte data, converting works fine. How much free space needs "btrfs-convert"? Does it need xx GByte, or does it need yy percent? Depends this free space on the number of files? I have filled my testing partition with *.iso images, 2 to 4 files. Viele Gruesse! Helmut -- 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
