Commit 9a82ca65 authored Oct 05, 2011 by Josef Bacik

Btrfs: take overflow into account in reserving space

My overcommit stuff can be a little racy when we're filling up the disk with
fs_mark and we overcommit into things that quickly get used up for data. So use
num_bytes to see if we have enough available space so we're less likely to
overcommit ourselves out of the ability to make reservations. Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>

parent 549b4fdb

fs/btrfs/extent-tree.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -3521,7 +3521,7 @@ again:
	avail >>= 1;		avail >>= 1;
	spin_unlock(&root->fs_info->free_chunk_lock);		spin_unlock(&root->fs_info->free_chunk_lock);

	if (used + orig_bytes < space_info->total_bytes + avail) {		if (used + num_bytes < space_info->total_bytes + avail) {
	space_info->bytes_may_use += orig_bytes;		space_info->bytes_may_use += orig_bytes;
	ret = 0;		ret = 0;
	}		}