xfs: add log recovery tracepoint for head/tail
Torn write detection and tail overwrite detection can shift the log
head and tail respectively in the event of CRC mismatch or
corruption errors. Add a high-level log recovery tracepoint to dump
the final log head/tail and make those values easily attainable in
debug/diagnostic situations.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 43d5df3..a362399 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -5598,6 +5598,8 @@ xlog_do_recover(
xfs_buf_t *bp;
xfs_sb_t *sbp;
+ trace_xfs_log_recover(log, head_blk, tail_blk);
+
/*
* First replay the images in the log.
*/