[PATCH 1/4] xfs_buflock: ignore if buffer already locked

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From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

If the trace data says we ran trylock but we were already locked, don't
record another lock.

Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
 tools/xfsbuflock.py |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)


diff --git a/tools/xfsbuflock.py b/tools/xfsbuflock.py
index 82b6e01f..cc15f582 100755
--- a/tools/xfsbuflock.py
+++ b/tools/xfsbuflock.py
@@ -87,7 +87,8 @@ class Buffer:
 		self.waiters = set()
 
 	def trylock(self, process, time):
-		self.lockdone(process, time)
+		if not self.locked:
+			self.lockdone(process, time)
 
 	def lockdone(self, process, time):
 		if self.locked:

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