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Btrfs: add sanity test for outstanding_extents accounting

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I introduced a regression wrt outstanding_extents accounting.  These are tricky
areas that aren't easily covered by xfstests as we could change MAX_EXTENT_SIZE
at any time.  So add sanity tests to cover the various conditions that are
tricky in order to make sure we don't introduce regressions in the future.
Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
This commit is contained in:
Josef Bacik
2015-03-16 17:38:52 -04:00
parent bcb7e449ec
commit 6a3891c551
4 changed files with 217 additions and 1 deletions
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3
fs/btrfs/extent-tree.c
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@@ -5285,6 +5285,9 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes)
if (dropped > 0)
to_free += btrfs_calc_trans_metadata_size(root, dropped);
if (btrfs_test_is_dummy_root(root))
return;
trace_btrfs_space_reservation(root->fs_info, "delalloc",
btrfs_ino(inode), to_free, 0);
if (root->fs_info->quota_enabled) {