Commit 5500cdbe authored Feb 23, 2012 by Liu Bo Committed by Chris Mason Feb 23, 2012

Btrfs: increase the global block reserve estimates



When doing IO with large amounts of data fragmentation, the global block
reserve calulations are too low.  This increases them to avoid
ENOSPC crashes.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

parent 50653190

fs/btrfs/extent-tree.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -4108,7 +4108,7 @@ 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);
		}