On Tue, Jan 17, 2012 at 05:51:59PM +0800, Liu Bo wrote: > I've kept hitting enospc warnings of global_rsv while running defragment on > files: > btrfs: block rsv returned -28 > WARNING: at fs/btrfs/extent-tree.c:5984 btrfs_alloc_free_block+0x333/0x340 [btrfs]() > ... > > I used a fio jobs to create a file with lots of fragments: > $ filefrag /mnt/btrfs/foobar > /mnt/btrfs/foobar: 66964 extents found > > and then "btrfs fi defrag /mnt/btrfs/foobar && sync" would pop the warnings. > > I found that the global_rsv size is just not enough for defragment, and didn't > find any space leak in using global_rsv, so double it and go ahead. I haven't pulled this one in yet, mostly because I think we need to take a step back and look harder at the numbers. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
