There is a small window near the end of md_do_sync where mddev->curr_resync
can be equal to MaxSector.
If status_resync is called during this window, the resulting /proc/mdstat
output contains a HUGE number of = signs due to the very large curr_resync:
Personalities : [raid1]
md123 : active raid1 sdd3[2] sdb3[0]
204736 blocks super 1.0 [2/1] [U_]
[=====================================================================
... (82 MB more) ...
================>] recovery =429496729.3% (9223372036854775807/204736)
finish=0.2min speed=12796K/sec
bitmap: 0/1 pages [0KB], 65536KB chunk
Modify status_resync to ensure the resync variable doesn't exceed
the array's max_sectors.
Signed-off-by: Nate Dailey <nate.dailey@xxxxxxxxxxx>
---
drivers/md/md.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 41c050b59ec4..4e4dee0ec2de 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7605,7 +7605,9 @@ static int status_resync(struct seq_file *seq, struct mddev *mddev)
if (test_bit(MD_RECOVERY_DONE, &mddev->recovery))
/* Still cleaning up */
resync = max_sectors;
- } else
+ } else if (resync > max_sectors)
+ resync = max_sectors;
+ else
resync -= atomic_read(&mddev->recovery_active);
if (resync == 0) {
--
2.14.1
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