On Mon, May 27, 2019 at 12:22:04PM +0800, Qu Wenruo wrote: > There is a bug report of BUG_ON() which is caused by __free_extent() > failed to lookup a backref extent: > Failed to find [1429288337408, 168, 16384] > btrfs unable to find ref byte nr 1429288583168 parent 0 root 2 owner 0 offset 0 > convert/source-ext2.c:834: ext2_copy_inodes: BUG_ON ret triggered, value -5 > ./btrfs-convert[0x410941] > ./btrfs-convert(main+0x1fdc)[0x40d3b8] > /lib64/libc.so.6(__libc_start_main+0xf3)[0x7f93bb7d2f33] > ./btrfs-convert(_start+0x2e)[0x40a96e] > > It's still uncertain how this bug can be triggered, but adding such > debug output will provide more info for us to debug. > > Signed-off-by: Qu Wenruo <wqu@xxxxxxxx> Added to devel, thanks.
