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btrfs: backref, add tracepoints for prelim_ref insertion and merging

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This patch adds a tracepoint event for prelim_ref insertion and
merging.  For each, the ref being inserted or merged and the count
of tree nodes is issued.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Jeff Mahoney
2017-07-12 16:20:08 -06:00
committed by David Sterba
parent 6c336b212b
commit 00142756e1
4 changed files with 131 additions and 58 deletions
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fs/btrfs/super.c
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@@ -61,6 +61,7 @@
#include "tests/btrfs-tests.h"
#include "qgroup.h"
#include "backref.h"
#define CREATE_TRACE_POINTS
#include <trace/events/btrfs.h>