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btrfs: tracepoints: add trace event for log_conflicting_inodes()

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log_conflicting_inodes() is an important step called during a fsync, as
well as during rename and link operations on inodes that were previously
logged. Add trace events for when entering and exiting that function.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2026-05-07 13:03:13 +01:00
parent aa0487b003
commit aba309b893
2 changed files with 62 additions and 0 deletions
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9
fs/btrfs/tree-log.c
View File

@ -6261,7 +6261,15 @@ static int log_conflicting_inodes(struct btrfs_trans_handle *trans,
if (ctx->logging_conflict_inodes)
return 0;
/*
* Avoid any work if no conflicting inodes and emitting the trace event
* which only adds noise and it's useless if there are no inodes.
*/
if (list_empty(&ctx->conflict_inodes))
return 0;
ctx->logging_conflict_inodes = true;
trace_btrfs_log_conflicting_inodes_enter(trans, ctx);
/*
* New conflicting inodes may be found and added to the list while we
@ -6355,6 +6363,7 @@ static int log_conflicting_inodes(struct btrfs_trans_handle *trans,
ctx->logging_conflict_inodes = false;
if (ret)
free_conflicting_inodes(ctx);
trace_btrfs_log_conflicting_inodes_exit(trans, ctx, ret);
return ret;
}

53
include/trace/events/btrfs.h
View File

@ -1294,6 +1294,59 @@ TRACE_EVENT(btrfs_add_conflicting_inode_exit,
__entry->conflict_ino_parent, __entry->ret)
);
TRACE_EVENT(btrfs_log_conflicting_inodes_enter,
TP_PROTO(const struct btrfs_trans_handle *trans,
const struct btrfs_log_ctx *ctx),
TP_ARGS(trans, ctx),
TP_STRUCT__entry_btrfs(
__field( u64, root_objectid )
__field( u64, transid )
__field( u64, ctx_ino )
),
TP_fast_assign(
TP_fast_assign_fsid(trans->fs_info);
__entry->root_objectid = btrfs_root_id(ctx->inode->root);
__entry->transid = trans->transid;
__entry->ctx_ino = btrfs_ino(ctx->inode);
),
TP_printk_btrfs("root=%llu(%s) transid=%llu ctx_ino=%llu",
show_root_type(__entry->root_objectid), __entry->transid,
__entry->ctx_ino)
);
TRACE_EVENT(btrfs_log_conflicting_inodes_exit,
TP_PROTO(const struct btrfs_trans_handle *trans,
const struct btrfs_log_ctx *ctx,
int ret),
TP_ARGS(trans, ctx, ret),
TP_STRUCT__entry_btrfs(
__field( u64, root_objectid )
__field( u64, transid )
__field( u64, ctx_ino )
__field( int, ret )
),
TP_fast_assign(
TP_fast_assign_fsid(trans->fs_info);
__entry->root_objectid = btrfs_root_id(ctx->inode->root);
__entry->transid = trans->transid;
__entry->ctx_ino = btrfs_ino(ctx->inode);
__entry->ret = ret;
),
TP_printk_btrfs("root=%llu(%s) transid=%llu ctx_ino=%llu ret=%d",
show_root_type(__entry->root_objectid), __entry->transid,
__entry->ctx_ino, __entry->ret)
);
TRACE_EVENT(btrfs_sync_fs,
TP_PROTO(const struct btrfs_fs_info *fs_info, int wait),