xfs: trace in-memory freecounter reservations

Add two tracepoints when the freecounter dips into the reserved pool
and when it is entirely out of space.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 01f387784039..a77a2de11278 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -1341,6 +1341,7 @@ xfs_dec_freecounter(
 			goto fdblocks_enospc;
 		}
 		counter->res_avail -= delta;
+		trace_xfs_freecounter_reserved(mp, ctr, delta, _RET_IP_);
 		spin_unlock(&mp->m_sb_lock);
 	}
 
@@ -1348,6 +1349,7 @@ xfs_dec_freecounter(
 	return 0;
 
 fdblocks_enospc:
+	trace_xfs_freecounter_enospc(mp, ctr, delta, _RET_IP_);
 	spin_unlock(&mp->m_sb_lock);
 	return -ENOSPC;
 }