Am Tue, 17 Jan 2012 17:51:59 +0800 schrieb Liu Bo <liubo2...@cn.fujitsu.com>:
> 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. > > Signed-off-by: Liu Bo <liubo2...@cn.fujitsu.com> > --- > fs/btrfs/extent-tree.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c > index 8603ee4..77ea23c 100644 > --- a/fs/btrfs/extent-tree.c > +++ b/fs/btrfs/extent-tree.c > @@ -3979,7 +3979,7 @@ static u64 calc_global_metadata_size(struct > btrfs_fs_info *fs_info) num_bytes += div64_u64(data_used + meta_used, > 50); > if (num_bytes * 3 > meta_used) > - num_bytes = div64_u64(meta_used, 3); > + num_bytes = div64_u64(meta_used, 3) * 2; > > return ALIGN(num_bytes, fs_info->extent_root->leafsize << > 10); } This patch breakes my system. With this applied all services fail on boot with "no space left" messages. -- 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
