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btrfs: qgroup: Re-arrange tracepoint timing to co-operate with reserved space tracepoint

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Newly introduced qgroup reserved space trace points are normally nested
into several common qgroup operations.

While some other trace points are not well placed to co-operate with
them, causing confusing output.

This patch re-arrange trace_btrfs_qgroup_release_data() and
trace_btrfs_qgroup_free_delayed_ref() trace points so they are triggered
before reserved space ones.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2017-03-13 15:52:09 +08:00 committed by David Sterba
parent 3159fe7bae
commit d51ea5dd22
2 changed files with 6 additions and 10 deletions
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10
fs/btrfs/qgroup.c
View File

@ -2857,14 +2857,14 @@ static int __btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len,
if (ret < 0)
goto out;
if (free) {
if (free)
trace_op = QGROUP_FREE;
trace_btrfs_qgroup_release_data(inode, start, len,
changeset.bytes_changed, trace_op);
if (free)
btrfs_qgroup_free_refroot(BTRFS_I(inode)->root->fs_info,
BTRFS_I(inode)->root->objectid,
changeset.bytes_changed);
trace_op = QGROUP_FREE;
}
trace_btrfs_qgroup_release_data(inode, start, len,
changeset.bytes_changed, trace_op);
out:
ulist_release(&changeset.range_changed);
return ret;

6
fs/btrfs/qgroup.h
View File

@ -230,15 +230,11 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
struct btrfs_qgroup_inherit *inherit);
void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
u64 ref_root, u64 num_bytes);
/*
* TODO: Add proper trace point for it, as btrfs_qgroup_free() is
* called by everywhere, can't provide good trace for delayed ref case.
*/
static inline void btrfs_qgroup_free_delayed_ref(struct btrfs_fs_info *fs_info,
u64 ref_root, u64 num_bytes)
{
btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes);
trace_btrfs_qgroup_free_delayed_ref(fs_info, ref_root, num_bytes);
btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes);
}
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS