btrfs: prefix fsid to all trace events
When using trace events to debug a problem, it's impossible to determine which file system generated a particular event. This patch adds a macro to prefix standard information to the head of a trace event. The extent_state alloc/free events are all that's left without an fs_info available. Signed-off-by:Jeff Mahoney <jeffm@suse.com> Signed-off-by:
David Sterba <dsterba@suse.com>
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