From b18df768ebf71196c3620d1e5f23f064c1ba1485 Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@gmail.com>
Date: Sun, 6 Dec 2020 16:29:13 -0500
Subject: [PATCH] bcachefs: Prevent journal reclaim from spinning

Without checking if we actually flushed anything, journal reclaim could
still go into an infinite loop while trying ot shut down.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---
 fs/bcachefs/journal_reclaim.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/bcachefs/journal_reclaim.c b/fs/bcachefs/journal_reclaim.c
index 5ab147e94167..e8fd11abe4c3 100644
--- a/fs/bcachefs/journal_reclaim.c
+++ b/fs/bcachefs/journal_reclaim.c
@@ -610,7 +610,7 @@ static int __bch2_journal_reclaim(struct journal *j, bool direct)
 		else
 			j->nr_background_reclaim += nr_flushed;
 		trace_journal_reclaim_finish(c, nr_flushed);
-	} while (min_nr);
+	} while (min_nr && nr_flushed);
 
 	memalloc_noreclaim_restore(flags);