At 02/19/2017 09:30 PM, Goldwyn Rodrigues wrote:
From: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
These commits show the current value of qg->reserved and
the amount modified. Though these are frequently called function,
we may require to monitor qg->reserved for some operations.
I have submitted similar patch for it before, while still not merged yet.
https://patchwork.kernel.org/patch/9453873/
And the latest version can be found in my qgroup fixes patchset.
https://github.com/adam900710/linux/tree/qgroup_fixes
Thanks,
Qu
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
---
fs/btrfs/qgroup.c | 4 ++++
include/trace/events/btrfs.h | 40 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 44 insertions(+)
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index dfd9986..4700cac 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -2159,6 +2159,8 @@ static int qgroup_reserve(struct btrfs_root *root, u64 num_bytes)
qg = u64_to_ptr(unode->aux);
+ trace_btrfs_qgroup_reserve(fs_info, qg->qgroupid, qg->reserved, num_bytes);
+
qg->reserved += num_bytes;
}
@@ -2204,6 +2206,8 @@ void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
qg = u64_to_ptr(unode->aux);
+ trace_btrfs_qgroup_free_refroot(fs_info, qg->qgroupid, qg->reserved, num_bytes);
+
qg->reserved -= num_bytes;
list_for_each_entry(glist, &qg->groups, next_group) {
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index 6d7fe11..f6a9f8c 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -1472,6 +1472,46 @@ TRACE_EVENT(qgroup_update_counters,
__entry->cur_new_count)
);
+DECLARE_EVENT_CLASS(btrfs_qgroup_reserved,
+
+ TP_PROTO(struct btrfs_fs_info *fs_info, u64 qgid,
+ u64 reserved, u64 num_bytes),
+
+ TP_ARGS(fs_info, qgid, reserved, num_bytes),
+
+ TP_STRUCT__entry_btrfs(
+ __field( u64, qgid )
+ __field( u64, reserved )
+ __field( u64, num_bytes )
+ ),
+
+ TP_fast_assign_btrfs(fs_info,
+ __entry->qgid = qgid;
+ __entry->reserved = reserved;
+ __entry->num_bytes = num_bytes;
+ ),
+
+ TP_printk_btrfs("qgid = %llu, reserved = %llu, num_bytes = %llu",
+ __entry->qgid,
+ __entry->reserved,
+ __entry->num_bytes)
+);
+
+
+DEFINE_EVENT(btrfs_qgroup_reserved, btrfs_qgroup_reserve,
+
+ TP_PROTO(struct btrfs_fs_info *fs_info, u64 qgid, u64 reserved, u64 num_bytes),
+
+ TP_ARGS(fs_info, qgid, reserved, num_bytes)
+);
+
+DEFINE_EVENT(btrfs_qgroup_reserved, btrfs_qgroup_free_refroot,
+
+ TP_PROTO(struct btrfs_fs_info *fs_info, u64 qgid, u64 reserved, u64 num_bytes),
+
+ TP_ARGS(fs_info, qgid, reserved, num_bytes)
+);
+
#endif /* _TRACE_BTRFS_H */
/* This part must be outside protection */
--
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