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btrfs: add tracepoints for outstanding extents mods

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This is handy for tracing problems with modifying the outstanding
extents counters.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2017-10-19 14:15:56 -04:00 committed by David Sterba
parent 8b62f87bad
commit dd48d4072e
2 changed files with 23 additions and 0 deletions
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2
fs/btrfs/btrfs_inode.h
View File

@ -274,6 +274,8 @@ static inline void btrfs_mod_outstanding_extents(struct btrfs_inode *inode,
inode->outstanding_extents += mod; inode->outstanding_extents += mod;
if (btrfs_is_free_space_inode(inode)) if (btrfs_is_free_space_inode(inode))
return; return;
trace_btrfs_inode_mod_outstanding_extents(inode->root, btrfs_ino(inode),
mod);
} }
static inline void btrfs_mod_reserved_extents(struct btrfs_inode *inode, int mod) static inline void btrfs_mod_reserved_extents(struct btrfs_inode *inode, int mod)

21
include/trace/events/btrfs.h
View File

@ -1695,6 +1695,27 @@ DEFINE_EVENT(btrfs__prelim_ref, btrfs_prelim_ref_insert,
TP_ARGS(fs_info, oldref, newref, tree_size) TP_ARGS(fs_info, oldref, newref, tree_size)
); );
TRACE_EVENT(btrfs_inode_mod_outstanding_extents,
TP_PROTO(struct btrfs_root *root, u64 ino, int mod),
TP_ARGS(root, ino, mod),
TP_STRUCT__entry_btrfs(
__field( u64, root_objectid )
__field( u64, ino )
__field( int, mod )
),
TP_fast_assign_btrfs(root->fs_info,
__entry->root_objectid = root->objectid;
__entry->ino = ino;
__entry->mod = mod;
),
TP_printk_btrfs("root=%llu(%s) ino=%llu mod=%d",
show_root_type(__entry->root_objectid),
(unsigned long long)__entry->ino, __entry->mod)
);
#endif /* _TRACE_BTRFS_H */ #endif /* _TRACE_BTRFS_H */
/* This part must be outside protection */ /* This part must be outside protection */