From: Brian Foster <bfoster@redhat.com>
Date: Mon, 8 Jan 2018 10:41:35 -0800
Subject: xfs: print transaction log reservation on overrun
Git-commit: 2c8f6265397642bb150d933fa46b1f7c294f4ffe
Patch-mainline: v4.16-rc1
References: bsc#1145235

The transaction dump code displays the content and reservation
consumption of a particular transaction in the event of an overrun.
It currently displays the reservation associated with the
transaction ticket, but not the original reservation attached to the
transaction.

The latter value reflects the original transaction reservation
calculation before additional reservation overhead is assigned, such
as for the CIL context header and potential split region headers.

Update xlog_print_trans() to also print the original transaction
reservation in the event of overrun. This provides a reference point
to identify how much reservation overhead was added to a particular
ticket by xfs_log_calc_unit_res().

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Acked-by: Nikolay Borisov <nborisov@suse.com>
---
 fs/xfs/xfs_log.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index a503af96d780..047df85528b0 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -2117,7 +2117,9 @@ xlog_print_trans(
 
 	/* dump core transaction and ticket info */
 	xfs_warn(mp, "transaction summary:");
-	xfs_warn(mp, "  flags	= 0x%x", tp->t_flags);
+	xfs_warn(mp, "  log res   = %d", tp->t_log_res);
+	xfs_warn(mp, "  log count = %d", tp->t_log_count);
+	xfs_warn(mp, "  flags     = 0x%x", tp->t_flags);
 
 	xlog_print_tic_res(mp, tp->t_ticket);